Merge branch 'hotfix/fix-nil-tag'

Conflicts:
	CHANGELOG.md

.gitignore

@@ -1,2 +0,0 @@
-constants.rb
-*.md

.travis.yml

@@ -0,0 +1,15 @@
+language: ruby
+before_install:
+  - gem update --system
+  - gem --version
+rvm:
+  - 2.1.0
+gemfile:
+  - Gemfile
+
+notifications:
+  email:
+    recipients:
+      - sky4winder+githubchangeloggenerator@gmail.com
+    on_success: never # [always|never|change]
+    on_failure: change # [always|never|change]

CHANGELOG.md

@@ -0,0 +1,269 @@
+# Change Log
+
+## [1.3.5](https://github.com/skywinder/Github-Changelog-Generator/tree/1.3.5) (2015-03-04)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.3.4...1.3.5)
+
+**Fixed bugs:**
+
+- Pull Requests in Wrong Tag [\#60](https://github.com/skywinder/Github-Changelog-Generator/issues/60)
+
+## [1.3.4](https://github.com/skywinder/Github-Changelog-Generator/tree/1.3.4) (2015-03-03)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.3.3...1.3.4)
+
+**Fixed bugs:**
+
+- --no-issues appears to break PRs [\#59](https://github.com/skywinder/Github-Changelog-Generator/issues/59)
+
+## [1.3.3](https://github.com/skywinder/Github-Changelog-Generator/tree/1.3.3) (2015-03-03)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.3.2...1.3.3)
+
+**Closed issues:**
+
+- Add \# character to encapsulate list. [\#58](https://github.com/skywinder/Github-Changelog-Generator/issues/58)
+
+## [1.3.2](https://github.com/skywinder/Github-Changelog-Generator/tree/1.3.2) (2015-03-03)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.3.1...1.3.2)
+
+**Fixed bugs:**
+
+- generation failed if github commit api return `404 Not Found` [\#57](https://github.com/skywinder/Github-Changelog-Generator/issues/57)
+
+## [1.3.1](https://github.com/skywinder/Github-Changelog-Generator/tree/1.3.1) (2015-02-27)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.3.0...1.3.1)
+
+## [1.3.0](https://github.com/skywinder/Github-Changelog-Generator/tree/1.3.0) (2015-02-26)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.2.8...1.3.0)
+
+**Implemented enhancements:**
+
+- Do not show `Unreleased` section, when it's empty. [\#55](https://github.com/skywinder/Github-Changelog-Generator/issues/55)
+
+- Separate list exclude and include labels [\#52](https://github.com/skywinder/Github-Changelog-Generator/issues/52)
+
+- Unreleased issues in separate section [\#47](https://github.com/skywinder/Github-Changelog-Generator/issues/47)
+
+- Separate by lists: Enhancements, Bugs, Pull requests. [\#31](https://github.com/skywinder/Github-Changelog-Generator/issues/31)
+
+**Fixed bugs:**
+
+- Test pull request with invalid label \(\#26\) in changelog appeared. [\#44](https://github.com/skywinder/Github-Changelog-Generator/issues/44)
+
+**Merged pull requests:**
+
+- Implement filtering of Pull Requests by milestones [\#50](https://github.com/skywinder/Github-Changelog-Generator/pull/50) ([skywinder](https://github.com/skywinder))
+
+## [1.2.8](https://github.com/skywinder/Github-Changelog-Generator/tree/1.2.8) (2015-02-17)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.2.7...1.2.8)
+
+**Closed issues:**
+
+- Bugs, that closed simultaneously with push not appeared in correct version. [\#37](https://github.com/skywinder/Github-Changelog-Generator/issues/37)
+
+**Merged pull requests:**
+
+- Feature/fix 37 [\#49](https://github.com/skywinder/Github-Changelog-Generator/pull/49) ([skywinder](https://github.com/skywinder))
+
+- Prettify output [\#48](https://github.com/skywinder/Github-Changelog-Generator/pull/48) ([skywinder](https://github.com/skywinder))
+
+## [1.2.7](https://github.com/skywinder/Github-Changelog-Generator/tree/1.2.7) (2015-01-26)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.2.6...1.2.7)
+
+**Merged pull requests:**
+
+- Add compare link between older version and newer version [\#46](https://github.com/skywinder/Github-Changelog-Generator/pull/46) ([sue445](https://github.com/sue445))
+
+## [1.2.6](https://github.com/skywinder/Github-Changelog-Generator/tree/1.2.6) (2015-01-21)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.2.5...1.2.6)
+
+**Merged pull requests:**
+
+- fix link tag format [\#45](https://github.com/skywinder/Github-Changelog-Generator/pull/45) ([sugamasao](https://github.com/sugamasao))
+
+## [1.2.5](https://github.com/skywinder/Github-Changelog-Generator/tree/1.2.5) (2015-01-15)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.2.4...1.2.5)
+
+**Implemented enhancements:**
+
+- Use milestone to specify in which version bug was fixed [\#22](https://github.com/skywinder/Github-Changelog-Generator/issues/22)
+
+**Fixed bugs:**
+
+- Error when trying to generate log for repo without tags [\#32](https://github.com/skywinder/Github-Changelog-Generator/issues/32)
+
+**Merged pull requests:**
+
+- PrettyPrint class is included using lowercase 'pp' [\#43](https://github.com/skywinder/Github-Changelog-Generator/pull/43) ([schwing](https://github.com/schwing))
+
+- support enterprise github via command line options [\#42](https://github.com/skywinder/Github-Changelog-Generator/pull/42) ([glenlovett](https://github.com/glenlovett))
+
+## [1.2.4](https://github.com/skywinder/Github-Changelog-Generator/tree/1.2.4) (2014-12-16)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.2.3...1.2.4)
+
+**Fixed bugs:**
+
+- Sometimes user is NULL during merges [\#41](https://github.com/skywinder/Github-Changelog-Generator/issues/41)
+
+- Crash when try generate log for rails [\#35](https://github.com/skywinder/Github-Changelog-Generator/issues/35)
+
+## [1.2.3](https://github.com/skywinder/Github-Changelog-Generator/tree/1.2.3) (2014-12-16)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.2.2...1.2.3)
+
+**Implemented enhancements:**
+
+- Add ability to run with one parameter instead -u -p [\#38](https://github.com/skywinder/Github-Changelog-Generator/issues/38)
+
+- Detailed output [\#33](https://github.com/skywinder/Github-Changelog-Generator/issues/33)
+
+**Fixed bugs:**
+
+- Docs lacking or basic behavior not as advertised [\#30](https://github.com/skywinder/Github-Changelog-Generator/issues/30)
+
+**Merged pull requests:**
+
+- Implement async fetching [\#39](https://github.com/skywinder/Github-Changelog-Generator/pull/39) ([skywinder](https://github.com/skywinder))
+
+- Fix crash when user is NULL [\#40](https://github.com/skywinder/Github-Changelog-Generator/pull/40) ([skywinder](https://github.com/skywinder))
+
+## [1.2.2](https://github.com/skywinder/Github-Changelog-Generator/tree/1.2.2) (2014-12-10)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.2.1...1.2.2)
+
+**Fixed bugs:**
+
+- Encapsulate \[ \> \* \_ \ \] signs in issues names [\#34](https://github.com/skywinder/Github-Changelog-Generator/issues/34)
+
+**Merged pull requests:**
+
+- Add a Bitdeli Badge to README [\#36](https://github.com/skywinder/Github-Changelog-Generator/pull/36) ([bitdeli-chef](https://github.com/bitdeli-chef))
+
+## [1.2.1](https://github.com/skywinder/Github-Changelog-Generator/tree/1.2.1) (2014-11-22)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.2.0...1.2.1)
+
+**Fixed bugs:**
+
+- Script fills changelog only for first 30 tags. [\#20](https://github.com/skywinder/Github-Changelog-Generator/issues/20)
+
+**Merged pull requests:**
+
+- Issues for last tag not in list [\#29](https://github.com/skywinder/Github-Changelog-Generator/pull/29) ([skywinder](https://github.com/skywinder))
+
+- Disable default --filter-pull-requests option. [\#28](https://github.com/skywinder/Github-Changelog-Generator/pull/28) ([skywinder](https://github.com/skywinder))
+
+## [1.2.0](https://github.com/skywinder/Github-Changelog-Generator/tree/1.2.0) (2014-11-19)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.1.4...1.2.0)
+
+**Merged pull requests:**
+
+- Add filter for pull-requests labels. \(option --filter-pull-requests\) [\#27](https://github.com/skywinder/Github-Changelog-Generator/pull/27) ([skywinder](https://github.com/skywinder))
+
+- Add ability to insert authors of pull-requests \(--\[no-\]author option\) [\#25](https://github.com/skywinder/Github-Changelog-Generator/pull/25) ([skywinder](https://github.com/skywinder))
+
+- Don't receive issues in case of --no-isses flag specied [\#24](https://github.com/skywinder/Github-Changelog-Generator/pull/24) ([skywinder](https://github.com/skywinder))
+
+## [1.1.4](https://github.com/skywinder/Github-Changelog-Generator/tree/1.1.4) (2014-11-18)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.1.2...1.1.4)
+
+**Implemented enhancements:**
+
+- Implement ability to retrieve GitHub token from ENV variable \(to not put it to script directly\) [\#19](https://github.com/skywinder/Github-Changelog-Generator/issues/19)
+
+**Merged pull requests:**
+
+- Sort tags by date [\#23](https://github.com/skywinder/Github-Changelog-Generator/pull/23) ([skywinder](https://github.com/skywinder))
+
+## [1.1.2](https://github.com/skywinder/Github-Changelog-Generator/tree/1.1.2) (2014-11-12)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.1.1...1.1.2)
+
+**Merged pull requests:**
+
+- Fix bug with dot signs in project name [\#18](https://github.com/skywinder/Github-Changelog-Generator/pull/18) ([skywinder](https://github.com/skywinder))
+
+- Fix bug with dot signs in user name [\#17](https://github.com/skywinder/Github-Changelog-Generator/pull/17) ([skywinder](https://github.com/skywinder))
+
+## [1.1.1](https://github.com/skywinder/Github-Changelog-Generator/tree/1.1.1) (2014-11-10)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.1.0...1.1.1)
+
+**Merged pull requests:**
+
+- Remove duplicates of issues and pull-requests with same number [\#15](https://github.com/skywinder/Github-Changelog-Generator/pull/15) ([skywinder](https://github.com/skywinder))
+
+- Sort issues by tags [\#14](https://github.com/skywinder/Github-Changelog-Generator/pull/14) ([skywinder](https://github.com/skywinder))
+
+- Add ability to add or exclude issues without any labels [\#13](https://github.com/skywinder/Github-Changelog-Generator/pull/13) ([skywinder](https://github.com/skywinder))
+
+## [1.1.0](https://github.com/skywinder/Github-Changelog-Generator/tree/1.1.0) (2014-11-10)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.0.1...1.1.0)
+
+**Implemented enhancements:**
+
+- Detect username and project form origin [\#11](https://github.com/skywinder/Github-Changelog-Generator/issues/11)
+
+**Fixed bugs:**
+
+- Bug with wrong credentials in 1.0.1 [\#12](https://github.com/skywinder/Github-Changelog-Generator/issues/12)
+
+- Markdown formating in the last line wrong [\#9](https://github.com/skywinder/Github-Changelog-Generator/issues/9)
+
+## [1.0.1](https://github.com/skywinder/Github-Changelog-Generator/tree/1.0.1) (2014-11-10)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.0.0...1.0.1)
+
+## [1.0.0](https://github.com/skywinder/Github-Changelog-Generator/tree/1.0.0) (2014-11-07)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/0.1.0...1.0.0)
+
+**Implemented enhancements:**
+
+- Add support for fixed issues and implemented enchanments. [\#6](https://github.com/skywinder/Github-Changelog-Generator/issues/6)
+
+- Implement option to specify output filename [\#4](https://github.com/skywinder/Github-Changelog-Generator/issues/4)
+
+**Fixed bugs:**
+
+- Last tag not appeared in changelog [\#5](https://github.com/skywinder/Github-Changelog-Generator/issues/5)
+
+**Merged pull requests:**
+
+- Implement support of different tags. [\#8](https://github.com/skywinder/Github-Changelog-Generator/pull/8) ([skywinder](https://github.com/skywinder))
+
+- Add support for issues in CHANGELOG [\#7](https://github.com/skywinder/Github-Changelog-Generator/pull/7) ([skywinder](https://github.com/skywinder))
+
+## [0.1.0](https://github.com/skywinder/Github-Changelog-Generator/tree/0.1.0) (2014-11-07)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/0.0.2...0.1.0)
+
+**Merged pull requests:**
+
+- Fix parsing date of pull request [\#3](https://github.com/skywinder/Github-Changelog-Generator/pull/3) ([skywinder](https://github.com/skywinder))
+
+- Add changelog generation for last tag [\#2](https://github.com/skywinder/Github-Changelog-Generator/pull/2) ([skywinder](https://github.com/skywinder))
+
+- Add option \(-o --output\) to specify name of the output file. [\#1](https://github.com/skywinder/Github-Changelog-Generator/pull/1) ([skywinder](https://github.com/skywinder))
+
+## [0.0.2](https://github.com/skywinder/Github-Changelog-Generator/tree/0.0.2) (2014-11-06)
+
+[Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/0.0.1...0.0.2)
+
+## [0.0.1](https://github.com/skywinder/Github-Changelog-Generator/tree/0.0.1) (2014-11-06)
+
+
+
+\* *This Change Log was automatically generated by [github_changelog_generator](https://github.com/skywinder/Github-Changelog-Generator)*

Gemfile

@@ -1,3 +1,4 @@
 source 'https://rubygems.org'
 gem 'github_api'
-gem 'httparty'
+gem 'colorize'
+gem 'rake'

Gemfile.lock

@@ -2,6 +2,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     addressable (2.3.6)
+    colorize (0.7.4)
     descendants_tracker (0.0.4)
       thread_safe (~> 0.3, >= 0.3.1)
     faraday (0.9.0)
@@ -14,17 +15,13 @@ GEM
       multi_json (>= 1.7.5, < 2.0)
       nokogiri (~> 1.6.3)
       oauth2
-    hashie (3.3.1)
-    httparty (0.13.2)
-      json (~> 1.8)
-      multi_xml (>= 0.5.2)
-    json (1.8.1)
-    jwt (1.0.0)
+    hashie (3.3.2)
+    jwt (1.2.0)
     mini_portile (0.6.1)
     multi_json (1.10.1)
     multi_xml (0.5.5)
     multipart-post (2.0.0)
-    nokogiri (1.6.4)
+    nokogiri (1.6.5)
       mini_portile (~> 0.6.0)
     oauth2 (1.0.0)
       faraday (>= 0.8, < 0.10)
@@ -33,11 +30,13 @@ GEM
       multi_xml (~> 0.5)
       rack (~> 1.2)
     rack (1.5.2)
+    rake (10.4.2)
     thread_safe (0.3.4)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  colorize
   github_api
-  httparty
+  rake

README.md

@@ -1,46 +1,153 @@
-Github Changelog Generator
-==================
 
 [![Gem Version](https://badge.fury.io/rb/github_changelog_generator.svg)](http://badge.fury.io/rb/github_changelog_generator)
+[![Build Status](https://travis-ci.org/skywinder/Github-Changelog-Generator.svg?branch=master)](https://travis-ci.org/skywinder/Github-Changelog-Generator)
 
-This script automatically generate change-log from your tags and merged pull-requests.
+GitHub Changelog Generator
+==================
 
-## Installation:
-`gem install github_changelog_generator`
+  - [Installation](#installation)
+  - [Output example](#output-example)
+  - [Usage](#usage)
+    - [Params](#params)
+    - [GitHub token](#github-token)
+  - [Features and advantages of this project](#features-and-advantages-of-this-project)
+    - [Alternatives](#alternatives)
+    - [Projects using this library](#projects-using-this-library)
+  - [Am I missed some essential feature?](#am-i-missed-some-essential-feature)
+  - [Contributing](#contributing)
+  - [License](#license)
 
-## Usage:
  
-### Example usage:
-`github_changelog_generator -u github-username -p github-project`
+Changelog generation has never been so easy.
 
-In output you will get `[your_project]_CHANGELOG.md` file with *pretty Markdown-formatted* changelogs in your current directory.
+**Fully automate changelog generation** - This gem generate change log file based on tags, issues and merged pull requests from **Github issue tracker**. This generator complies all [change log format guidelines](http://keepachangelog.com/).
 
-### Params:
-    github_changelog_generator -u user_name -p project_name [-t 16-digit-GitHubToken] [options]
-	    -u, --user [USER]                your username on GitHub
-	    -p, --project [PROJECT]          name of project on GitHub
-	    -t, --token [TOKEN]              To make more than 50 requests this app required your OAuth token for GitHub. You can generate it on https://github.com/settings/applications
+## Installation
+
+	[sudo] gem install github_changelog_generator
+
+## Output example
+
+- Look at **[CHANGELOG.md](https://github.com/skywinder/Github-Changelog-Generator/blob/master/CHANGELOG.md)** for this project
+- [ActionSheetPicker-3.0/CHANGELOG.md](https://github.com/skywinder/ActionSheetPicker-3.0/blob/master/CHANGELOG.md)  was generated by command:
+
+		github_changelog_generator -u skywinder -p ActionSheetPicker-3.0
+
+- In general it looks like this:
+
+> ## [1.2.5](https://github.com/skywinder/Github-Changelog-Generator/tree/1.2.5) (2015-01-15)
+> 
+> [Full Changelog](https://github.com/skywinder/Github-Changelog-Generator/compare/1.2.4...1.2.5)
+> 
+> **Implemented enhancements:**
+> 
+> - Use milestone to specify in which version bug was fixed [\#22](https://github.com/skywinder/Github-Changelog-Generator/issues/22)
+> 
+> **Fixed bugs:**
+> 
+> - Error when trying to generate log for repo without tags [\#32](https://github.com/skywinder/Github-Changelog-Generator/issues/32)
+> 
+> **Merged pull requests:**
+> 
+> - PrettyPrint class is included using lowercase 'pp' [\#43](https://github.com/skywinder/Github-Changelog-Generator/pull/43) ([schwing](https://github.com/schwing))
+> 
+> - support enterprise github via command line options [\#42](https://github.com/skywinder/Github-Changelog-Generator/pull/42) ([glenlovett](https://github.com/glenlovett))
+
+
+## Usage
+**It's really simple**: 
+
+- If your **git remote** `origin` refer to your GitHub repo, then just go to your project folder and run:
+
+		github_changelog_generator
+
+-  or from anywhere:
+
+		github_changelog_generator -u github_username -p github_project
+     
+As output you will get `CHANGELOG.md` file with pretty *Markdown-formatted* changelog.
+
+### Params
+Type `github_changelog_generator --help` for detailed usage.
+
+    Usage: changelog_generator [options]
+    -u, --user [USER]                Username of the owner of target GitHub repo
+    -p, --project [PROJECT]          Name of project on GitHub
+    -t, --token [TOKEN]              To make more than 50 requests per hour your GitHub token required. You can generate it here: https://github.com/settings/tokens/new
+    -f, --date-format [FORMAT]       Date format. Default is %d/%m/%y
+    -o, --output [NAME]              Output file. Default is CHANGELOG.md
+        --[no-]verbose               Run verbosely. Default is true
+        --[no-]issues                Include closed issues to changelog. Default is true
+        --[no-]issues-wo-labels      Include closed issues without labels to changelog. Default is true
+        --[no-]pr-wo-labels          Include pull requests without labels to changelog. Default is true
+        --[no-]pull-requests         Include pull-requests to changelog. Default is true
+        --[no-]filter-by-milestone   Use milestone to detect when issue was resolved. Default is true
+        --[no-]author                Add author of pull-request in the end. Default is true
+        --unreleased-only            Generate log from unreleased closed issues only.
+        --[no-]unreleased            Add to log unreleased closed issues. Default is true
+        --[no-]compare-link          Include compare link between older version and newer version. Default is true
+        --include-labels  x,y,z      Issues only with that labels will be included to changelog. Default is 'bug,enhancement'
+        --exclude-labels  x,y,z      Issues with that labels will be always excluded from changelog. Default is 'duplicate,question,invalid,wontfix'
+        --github-site [URL]          The Enterprise Github site on which your project is hosted.
+        --github-api [URL]           The enterprise endpoint to use for your Github API.
+    -v, --version                    Print version number
     -h, --help                       Displays Help
-	    -v, --[no-]verbose               Run verbosely
-	    -l, --last-changes               generate log between last 2 tags
-	    -f, --date-format [FORMAT]       date format. default is %d/%m/%y 
 
 
-## Real examples:
-### [This changelog](https://github.com/skywinder/ActionSheetPicker-3.0/blob/master/CHANGELOG.md) was generated by 
-`github_changelog_generator -u skywinder -p ActionSheetPicker-3.0`: [ActionSheetPicker-3.0/CHANGELOG.md](https://github.com/skywinder/ActionSheetPicker-3.0/blob/master/CHANGELOG.md)
+### GitHub token
 
-## FAQ
-Since GitHub allow to make only 50 requests without authentication it's recommended to run this scrip with key `-t [your 16 digit token]` that you can easily **[generate here](https://github.com/settings/applications)**.
+Since GitHub allow to make only 50 requests without authentication it's recommended to run this script with token
+
+**You can easily [generate it here](https://github.com/settings/applications)**.
+
+And:
+
+- Run with key `-t [your-16-digit-token]` 
+- Or set environment variable `CHANGELOG_GITHUB_TOKEN` and specify there your token. 
+ 		
+	i.e. add to your `~/.bash_profile` or `~/.zshrc` or any other place to load ENV variables string :
+
+        export CHANGELOG_GITHUB_TOKEN="your-40-digit-github-token"
 
 So, if you got error like this:
->! /Library/Ruby/Gems/2.0.0/gems/github_api-0.12.2/lib/github_api/response/raise_error.rb:14:in `on_complete': GET https://api.github.com/repos/skywinder/ActionSheetPicker-3.0/git/commits/89678f7d7f66873c858e6cb07bf697192aca6768: 403 API rate limit exceeded for 195.88.177.9. (But here's the good news: Authenticated requests get a higher rate limit. Check out the documentation for more details.) (Github::Error::Forbidden) 
+>! /Library/Ruby/Gems/2.0.0/gems/github_api-0.12.2/lib/github_api/response/raise_error.rb:14:in `on_complete'
 
-Then you have to generate this token or wait for 1 hour
+It's time to create this token or wait for 1 hour before GitHub reset the counter for your IP.
 
-## License
+##Features and advantages of this project
+- Generate canonical change log file, followed by [keepachangelog.com guidlines](http://keepachangelog.com/)
+- Simply add links for all closed issues and merged pull requests
+- Possible to generate **Unreleased** changes (closed issues that have not released yet)
+- Flexible format customisation:
+    - Customize issues, that should be added to changelog
+    - Custom date format supported 
+    - Ability to manually specify in which version issue was fixed (in case, when closed date is not match) by setting `milestone` of issue the same name as tag of  required version
+    - Ability to exclude specific issues from change log (by labels)
+        - Automatically exclude "questions" - issues marked as `question` labels (and other issues, that shouldn't be in change log file: with `duplicate invalid wontfix` labels)
+- Distinguish bug fixes, enchantments, and closed issues according labels.
+    - 	**Issues** (closed issues w/o any labels)
+    - **Merged pull-requests** (all merged pull-requests)
+    - **Bug-fixes** (by label `bug` in issue)
+    - **Enhancements** (by label `enhancement` in issue)
 
-Github Changelog Generator is released under the [MIT License](http://www.opensource.org/licenses/MIT).
+###Alternatives
+Here is a [wikipage list of alternatives](https://github.com/skywinder/Github-Changelog-Generator/wiki/Alternatives), that I found. But no one was satisfy my requirements.
+
+*If you know other projects - feel free to edit this Wiki page!*
+
+
+### Projects using this library
+[Wikipage with list of projects](https://github.com/skywinder/Github-Changelog-Generator/wiki/Projects-using-Github-Changelog-Generator) 
+
+*If you are using `github_changelog_generator` for generation change log in your project or know of project that uses it, please add it to [this] (https://github.com/skywinder/Github-Changelog-Generator/wiki/Projects-using-Github-Changelog-Generator) list.*
+
+## Am I missed some essential feature?
+
+**Nothing is impossible!** 
+
+Open an [issue](https://github.com/skywinder/Github-Changelog-Generator/issues/new) and let's make generator better together!
+
+*Bug reports, feature requests, patches, well-wishes are always welcome!*
 
 ## Contributing
 
@@ -51,6 +158,6 @@ Github Changelog Generator is released under the [MIT License](http://www.openso
 5. Push to the branch (`git push origin my-new-feature`)
 6. Create a new Pull Request
 
-**Bug reports, feature requests, patches, well-wishes, and rap demo tapes are always welcome!**
+## License
 
-*Improvements more than welcome - they are kindly requested! :)*
+Github Changelog Generator is released under the [MIT License](http://www.opensource.org/licenses/MIT).

Rakefile

@@ -0,0 +1,9 @@
+require "rake/testtask"
+
+task :default => [:test]
+
+Rake::TestTask.new do |t|
+  t.verbose = true
+  t.libs.push("demo", "test")
+  t.pattern = "test/**/*_test.rb"
+end

bin/github_changelog_generator

@@ -1,5 +1,4 @@
-#!/usr/bin/env ruby
+#! /usr/bin/env ruby
 
 require 'github_changelog_generator'
-
-ChangelogGenerator.new.compund_changelog
+GitHubChangelogGenerator::ChangelogGenerator.new.compund_changelog

bump_gemfile.rb

@@ -0,0 +1,227 @@
+#!/usr/bin/env ruby
+require 'optparse'
+
+SPEC_TYPE = 'gemspec'
+
+:major
+:minor
+:patch
+
+@options = {:dry_run => false, :bump_number => :patch}
+
+OptionParser.new { |opts|
+  opts.banner = 'Usage: bump.rb [options]'
+
+  opts.on('-d', '--dry-run', 'Dry run') do |v|
+    @options[:dry_run] = v
+  end
+  opts.on('-a', '--major', 'Bump major version') do |v|
+    @options[:bump_number] = :major
+  end
+  opts.on('-m', '--minor', 'Bump minor version') do |v|
+    @options[:bump_number] = :minor
+  end
+  opts.on('-p', '--patch', 'Bump patch version') do |v|
+    @options[:bump_number] = :patch
+  end
+  opts.on('-r', '--revert', 'Revert last bump') do |v|
+    @options[:revert] = v
+  end
+}.parse!
+
+p @options
+
+def check_repo_is_clean_or_dry_run
+  value =%x[#{'git status --porcelain'}]
+
+  if value.empty?
+    puts 'Repo is clean -> continue'
+  else
+    if @options[:dry_run]
+      puts 'Repo not clean, "Dry run" enabled -> continue'
+    else
+      puts 'Repository not clean -> exit'
+      exit
+    end
+  end
+end
+
+
+def find_spec_file
+  list_of_specs = execute_line("find . -name '*.#{SPEC_TYPE}'")
+  arr = list_of_specs.split("\n")
+
+  spec_file = ''
+
+  case arr.count
+    when 0
+      puts "No #{SPEC_TYPE} files found. -> Exit."
+      exit
+    when 1
+      spec_file = arr[0]
+    else
+      puts 'Which spec should be used?'
+      arr.each_with_index { |file, index| puts "#{index+1}. #{file}" }
+      input_index = Integer(gets.chomp)
+      spec_file = arr[input_index-1]
+  end
+
+  if spec_file == nil
+    puts "Can't find specified spec file -> exit"
+    exit
+  end
+
+  spec_file.sub('./', '')
+
+end
+
+def find_current_gem_file
+  list_of_specs = execute_line("find . -name '*.gem'")
+  arr = list_of_specs.split("\n")
+
+  spec_file = ''
+
+  case arr.count
+    when 0
+      puts "No #{SPEC_TYPE} files found. -> Exit."
+      exit
+    when 1
+      spec_file = arr[0]
+    else
+      puts 'Which spec should be used?'
+      arr.each_with_index { |file, index| puts "#{index+1}. #{file}" }
+      input_index = Integer(gets.chomp)
+      spec_file = arr[input_index-1]
+  end
+
+  if spec_file == nil
+    puts "Can't find specified spec file -> exit"
+    exit
+  end
+
+  spec_file.sub('./', '')
+
+end
+
+def find_version_in_podspec(podspec)
+  readme = File.read(podspec)
+
+  #try to find version in format 1.22.333
+  re = /(\d+)\.(\d+)\.(\d+)/m
+
+  match_result = re.match(readme)
+
+  unless match_result
+    puts 'Not found any versions'
+    exit
+  end
+
+  puts "Found version #{match_result[0]}"
+  return match_result[0], match_result.captures
+end
+
+def bump_version(versions_array)
+  bumped_result = versions_array.dup
+  bumped_result.map! { |x| x.to_i }
+
+  case @options[:bump_number]
+    when :major
+      bumped_result[0] += 1
+      bumped_result[1] = 0
+      bumped_result[2] = 0
+    when :minor
+      bumped_result[1] += 1
+      bumped_result[2] = 0
+    when :patch
+      bumped_result[2] += 1
+    else
+      raise('unknown bump_number')
+  end
+
+
+  bumped_version = bumped_result.join('.')
+  puts "Bump version: #{versions_array.join('.')} -> #{bumped_version}"
+  bumped_version
+end
+
+def execute_line(line)
+  output = `#{line}`
+  check_exit_status(output)
+
+  output
+end
+
+def execute_line_if_not_dry_run(line)
+  if @options[:dry_run]
+    puts "Dry run: #{line}"
+    nil
+  else
+    puts line
+    value = %x[#{line}]
+    puts value
+    check_exit_status(value)
+    value
+  end
+end
+
+def check_exit_status(output)
+  if $?.exitstatus != 0
+    puts "Output:\n#{output}\nExit status = #{$?.exitstatus} ->Terminate script."
+    exit
+  end
+end
+
+def run_bumping_script
+
+  check_repo_is_clean_or_dry_run
+  spec_file = find_spec_file
+  result, versions_array = find_version_in_podspec(spec_file)
+  bumped_version = bump_version(versions_array)
+
+  unless @options[:dry_run]
+    puts 'Are you sure? Press Y to continue:'
+    str = gets.chomp
+    if str != 'Y'
+      puts '-> exit'
+      exit
+    end
+  end
+
+  execute_line_if_not_dry_run("sed -i \"\" \"s/#{result}/#{bumped_version}/\" README.md")
+  execute_line_if_not_dry_run("sed -i \"\" \"s/#{result}/#{bumped_version}/\" #{spec_file}")
+  execute_line_if_not_dry_run("git commit --all -m \"Update #{$SPEC_TYPE} to version #{bumped_version}\"")
+  execute_line_if_not_dry_run("git tag #{bumped_version}")
+  execute_line_if_not_dry_run('git push')
+  execute_line_if_not_dry_run('git push --tags')
+  execute_line_if_not_dry_run("gem build #{spec_file}")
+
+  gem = find_current_gem_file
+  execute_line_if_not_dry_run("gem push #{gem}")
+  # execute_line_if_not_dry_run("pod trunk push #{spec_file}")
+
+end
+
+def revert_last_bump
+  spec_file = find_spec_file
+  result, _ = find_version_in_podspec(spec_file)
+
+  puts "DELETE tag #{result} and HARD reset HEAD~1?\nPress Y to continue:"
+  str = gets.chomp
+  if str != 'Y'
+    puts '-> exit'
+    exit
+  end
+  execute_line_if_not_dry_run("git tag -d #{result}")
+  execute_line_if_not_dry_run('git reset --hard HEAD~1')
+  execute_line_if_not_dry_run("git push --delete origin #{result}")
+end
+
+if __FILE__ == $0
+
+  if @options[:revert]
+    revert_last_bump
+  else
+    run_bumping_script
+  end
+
+end

github_changelog_generator.gemspec

@@ -1,21 +1,32 @@
-Gem::Specification.new do |s|
-  s.name               = "github_changelog_generator"
-  s.version            = "0.0.2"
-  s.default_executable = "github_changelog_generator"
+# coding: utf-8
 
-  s.required_ruby_version     = '>= 1.9.3'
-  s.authors = ["Petr Korolev"]
-  s.date = %q{2014-10-10}
-  s.description = %q{Script, that automatically generate change-log from your tags and pull-requests}
-  s.email = %q{sky4winder+github_changelog_generator@gmail.com}
-  s.files = ["lib/github_changelog_generator.rb", "lib/github_changelog_generator/parser.rb", "bin/github_changelog_generator"]
-  s.homepage = %q{https://github.com/skywinder/Github-Changelog-Generator}
-  s.require_paths = ["lib"]
-  s.rubygems_version = %q{1.6.2}
-  s.summary = %q{Script, that automatically generate change-log from your tags and pull-requests.}
-  s.license       = "MIT"
-  s.add_runtime_dependency(%q<httparty>, ["~> 0.13"])
-  s.add_runtime_dependency(%q<github_api>, ["~> 0.12"])
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'github_changelog_generator/version'
+
+Gem::Specification.new do |spec|
+  spec.name               = "github_changelog_generator"
+  spec.version            = GitHubChangelogGenerator::VERSION
+  spec.default_executable = "github_changelog_generator"
+
+  spec.required_ruby_version     = '>= 1.9.3'
+  spec.authors = ["Petr Korolev"]
+  spec.email = %q{sky4winder+github_changelog_generator@gmail.com}
+  spec.date = `date +"%Y-%m-%d"`.strip!
+  spec.summary = %q{Script, that automatically generate changelog from your tags, issues, labels and pull requests.}
+  spec.description = %q{Script, that automatically generate changelog from your tags, issues, labels and pull requests.}
+  spec.homepage = %q{https://github.com/skywinder/Github-Changelog-Generator}
+  spec.license       = "MIT"
+
+  spec.files = `git ls-files -z`.split("\x0")
+  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
+  spec.require_paths = ["lib"]
+
+  spec.add_development_dependency "bundler", "~> 1.7"
+  spec.add_development_dependency "rake", "~> 10.0"
+
+  spec.add_runtime_dependency(%q<github_api>, ["~> 0.12"])
+  spec.add_runtime_dependency(%q<colorize>, ["~> 0.7"])
 
-  s.executables   = %w(github_changelog_generator)
 end

lib/CHANGELOG.md

@@ -0,0 +1,5 @@
+# Change Log
+
+
+
+\* *This Change Log was automatically generated by [github_changelog_generator](https://github.com/skywinder/Github-Changelog-Generator)*

lib/github_changelog_generator.rb

@@ -2,71 +2,192 @@
 
 require 'github_api'
 require 'json'
-require 'httparty'
+require 'colorize'
+require 'benchmark'
+
 require_relative 'github_changelog_generator/parser'
+require_relative 'github_changelog_generator/generator'
+require_relative 'github_changelog_generator/version'
 
+module GitHubChangelogGenerator
+  class ChangelogGenerator
 
-class ChangelogGenerator
+    attr_accessor :options, :all_tags, :github
 
-  attr_accessor :options, :all_tags
+    PER_PAGE_NUMBER = 30
 
-  def initialize()
+    def initialize
 
       @options = Parser.parse_options
-    if @options[:token]
-      @github = Github.new oauth_token: @options[:token]
-    else
-      @github = Github.new
-    end
-    @all_tags = self.get_all_tags
-    @pull_requests = self.get_all_closed_pull_requests
 
+      fetch_github_token
+
+      github_options = {per_page: PER_PAGE_NUMBER}
+      github_options[:oauth_token] = @github_token unless @github_token.nil?
+      github_options[:endpoint] = options[:github_endpoint] unless options[:github_endpoint].nil?
+      github_options[:site] = options[:github_endpoint] unless options[:github_site].nil?
+
+      @github = Github.new github_options
+
+      @generator = Generator.new(@options)
+
+      @all_tags = self.get_all_tags
+      @issues, @pull_requests = self.fetch_issues_and_pull_requests
+
+      if @options[:pulls]
+        @pull_requests = self.get_filtered_pull_requests
+        self.fetch_merged_at_pull_requests
+      else
+        @pull_requests = []
+      end
+
+      if @options[:issues]
+        @issues = self.get_filtered_issues
+      else
+        @issues = []
+      end
+
+      fetch_event_for_issues_and_pr
+      detect_actual_closed_dates
       @tag_times_hash = {}
     end
 
+    def detect_actual_closed_dates
+
+      if @options[:verbose]
+        print "Fetching closed dates for issues...\r"
+      end
+
+      threads = []
+
+      @issues.each { |issue|
+        threads << Thread.new {
+          find_closed_date_by_commit(issue)
+        }
+      }
+
+      @pull_requests.each { |pull_request|
+        threads << Thread.new {
+          find_closed_date_by_commit(pull_request)
+        }
+      }
+      threads.each { |thr| thr.join }
+
+      if @options[:verbose]
+        puts 'Fetching closed dates for issues: Done!'
+      end
+    end
+
+    def find_closed_date_by_commit(issue)
+      unless issue['events'].nil?
+        #if it's PR -> then find "merged event", in case of usual issue -> fond closed date
+        compare_string = issue[:merged_at].nil? ? 'closed' : 'merged'
+        # reverse! - to find latest closed event. (event goes in date order)
+        issue['events'].reverse!.each { |event|
+          if event[:event].eql? compare_string
+            if event[:commit_id].nil?
+              issue[:actual_date] = issue[:closed_at]
+            else
+              begin
+                commit = @github.git_data.commits.get @options[:user], @options[:project], event[:commit_id]
+                issue[:actual_date] = commit[:author][:date]
+              rescue
+                puts "Warning: can't fetch commit #{event[:commit_id]} probably it referenced from another repo."
+                issue[:actual_date] = issue[:closed_at]
+              end
+            end
+            break
+          end
+        }
+      end
+      #TODO: assert issues, that remain without 'actual_date' hash for some reason.
+    end
+
     def print_json(json)
       puts JSON.pretty_generate(json)
     end
 
-  def exec_command(cmd)
-    exec_cmd = "cd #{$project_path} && #{cmd}"
-    %x[#{exec_cmd}]
+    def fetch_merged_at_pull_requests
+      if @options[:verbose]
+        print "Fetching merged dates...\r"
       end
+      response = @github.pull_requests.list @options[:user], @options[:project], :state => 'closed'
 
+      pull_requests = []
+      page_i = 0
+      response.each_page do |page|
+        page_i += PER_PAGE_NUMBER
+        count_pages = response.count_pages
+        print "Fetching merged dates... #{page_i}/#{count_pages * PER_PAGE_NUMBER}\r"
+        pull_requests.concat(page)
+      end
+      print "                                                   \r"
 
-  def get_all_closed_pull_requests
-
-
-    issues = @github.pull_requests.list @options[:user], @options[:project], :state => 'closed'
-    json = issues.body
+      @pull_requests.each { |pr|
+        fetched_pr = pull_requests.find { |fpr|
+          fpr.number == pr.number }
+        pr[:merged_at] = fetched_pr[:merged_at]
+        pull_requests.delete(fetched_pr)
+      }
 
       if @options[:verbose]
-      puts 'Receive all pull requests'
+        puts 'Fetching merged dates... Done!'
       end
 
-    json
+    end
 
+    def get_filtered_pull_requests
+
+      pull_requests = @pull_requests
+      filtered_pull_requests = pull_requests
+
+
+      unless @options[:include_labels].nil?
+        filtered_pull_requests = pull_requests.select { |issue|
+          #add all labels from @options[:incluse_labels] array
+          (issue.labels.map { |label| label.name } & @options[:include_labels]).any?
+        }
+      end
+
+      unless @options[:exclude_labels].nil?
+        filtered_pull_requests = filtered_pull_requests.select { |issue|
+          #delete all labels from @options[:exclude_labels] array
+          !(issue.labels.map { |label| label.name } & @options[:exclude_labels]).any?
+        }
+      end
+
+      if @options[:add_issues_wo_labels]
+        issues_wo_labels = pull_requests.select {
+          # add issues without any labels
+            |issue| !issue.labels.map { |label| label.name }.any?
+        }
+        filtered_pull_requests |= issues_wo_labels
+      end
+
+
+      if @options[:verbose]
+        puts "Filtered pull requests: #{filtered_pull_requests.count}"
+      end
+
+      filtered_pull_requests
     end
 
     def compund_changelog
-    if @options[:verbose]
-      puts 'Generating changelog:'
-    end
 
-    log = "# Changelog\n\n"
-
-    if @options[:last]
-      log += self.generate_log_between_tags(self.all_tags[0], self.all_tags[1])
-    elsif @options[:tag1] && @options[:tag2]
+      log = "# Change Log\n\n"
 
+      if @options[:unreleased_only]
+        log += self.generate_log_between_tags(self.all_tags[0], nil)
+      elsif @options[:tag1] and @options[:tag2]
         tag1 = @options[:tag1]
         tag2 = @options[:tag2]
         tags_strings = []
-      self.all_tags.each { |x| tags_strings.push(x['name'])}
+        self.all_tags.each { |x| tags_strings.push(x['name']) }
 
         if tags_strings.include?(tag1)
           if tags_strings.include?(tag2)
-          hash = Hash[tags_strings.map.with_index.to_a]
+            to_a = tags_strings.map.with_index.to_a
+            hash = Hash[to_a]
             index1 = hash[tag1]
             index2 = hash[tag2]
             log += self.generate_log_between_tags(self.all_tags[index1], self.all_tags[index2])
@@ -82,125 +203,432 @@ class ChangelogGenerator
         log += self.generate_log_for_all_tags
       end
 
+      log += "\n\n\\* *This Change Log was automatically generated by [github_changelog_generator](https://github.com/skywinder/Github-Changelog-Generator)*"
 
-    if @options[:verbose]
-      puts log
-    end
-
-    log += "\n\n*This file was generated by [github_changelog_generator](https://github.com/skywinder/Github-Changelog-Generator)*"
-    output_filename = "#{@options[:project]}_CHANGELOG.md"
+      output_filename = "#{@options[:output]}"
       File.open(output_filename, 'w') { |file| file.write(log) }
-
-    puts "Done! Generated log placed in #{output_filename}"
+      puts 'Done!'
+      puts "Generated log placed in #{`pwd`.strip!}/#{output_filename}"
 
     end
 
     def generate_log_for_all_tags
+
+      fetch_tags_dates
+
+      if @options[:verbose]
+        puts "Sorting tags.."
+      end
+
+      @all_tags.sort_by! { |x| self.get_time_of_tag(x) }.reverse!
+
+      if @options[:verbose]
+        puts "Generating log.."
+      end
+
+
       log = ''
-    for index in 1 ... self.all_tags.size
-      log += self.generate_log_between_tags(self.all_tags[index-1], self.all_tags[index])
+
+      if @options[:unreleased] && @all_tags.count != 0
+        unreleased_log = self.generate_log_between_tags(self.all_tags[0], nil)
+        if unreleased_log
+          log += unreleased_log
+        end
+      end
+
+      (1 ... self.all_tags.size).each { |index|
+        log += self.generate_log_between_tags(self.all_tags[index], self.all_tags[index-1])
+      }
+      if @all_tags.count != 0
+        log += generate_log_between_tags(nil, self.all_tags.last)
       end
 
       log
     end
 
+    def fetch_tags_dates
+      if @options[:verbose]
+        print "Fetching tags dates..\r"
+      end
+
+      # Async fetching tags:
+      threads = []
+      i = 0
+      all = @all_tags.count
+      @all_tags.each { |tag|
+        # explicit set @tag_times_hash to write data safety.
+        threads << Thread.new {
+          self.get_time_of_tag(tag, @tag_times_hash)
+          if @options[:verbose]
+            print "Fetching tags dates: #{i+1}/#{all}\r"
+            i+=1
+          end
+
+        }
+      }
+
+      print "                                 \r"
+
+      threads.each { |thr| thr.join }
+
+      if @options[:verbose]
+        puts 'Fetching tags: Done!'
+      end
+    end
+
     def is_megred(number)
       @github.pull_requests.merged? @options[:user], @options[:project], number
     end
 
-  def get_all_merged_pull_requests
-    json = self.get_all_closed_pull_requests
-    puts 'Check if the requests is merged... (it can take a while)'
-
-    json.delete_if { |req|
-      merged = self.is_megred(req[:number])
-      if @options[:verbose]
-        puts "##{req[:number]} #{merged ? 'merged' : 'not merged'}"
-      end
-      !merged
-    }
-  end
-
     def get_all_tags
 
-    url = "https://api.github.com/repos/#{@options[:user]}/#{@options[:project]}/tags"
-
       if @options[:verbose]
-      puts "Receive tags for repo #{url}"
+        print "Fetching tags...\r"
       end
 
-    response = HTTParty.get(url,
-                            :headers => {'Authorization' => 'token 8587bb22f6bf125454768a4a19dbcc774ea68d48',
-                                        'User-Agent' => 'Changelog-Generator'})
-
-    json_parse = JSON.parse(response.body)
+      response = @github.repos.tags @options[:user], @options[:project]
 
+      tags = []
+      page_i = 0
+      count_pages = response.count_pages
+      response.each_page do |page|
+        page_i += PER_PAGE_NUMBER
+        print "Fetching tags... #{page_i}/#{count_pages * PER_PAGE_NUMBER}\r"
+        tags.concat(page)
+      end
+      print "                               \r"
       if @options[:verbose]
-      puts "Found #{json_parse.count} tags"
+        puts "Found #{tags.count} tags"
       end
 
-    json_parse
+      tags
     end
 
-  def generate_log_between_tags(since_tag, till_tag)
-    since_tag_time = self.get_time_of_tag(since_tag)
-    till_tag_time = self.get_time_of_tag(till_tag)
+    def fetch_github_token
+      env_var = @options[:token] ? @options[:token] : (ENV.fetch 'CHANGELOG_GITHUB_TOKEN', nil)
 
-    # if we mix up tags order - lits fix it!
-    if since_tag_time > till_tag_time
-      since_tag, till_tag = till_tag, since_tag
-      since_tag_time, till_tag_time = till_tag_time, since_tag_time
+      unless env_var
+        puts "Warning: No token provided (-t option) and variable $CHANGELOG_GITHUB_TOKEN was not found.".yellow
+        puts "This script can make only 50 requests to GitHub API per hour without token!".yellow
       end
 
-    till_tag_name = till_tag['name']
+      @github_token ||= env_var
 
-    pull_requests = Array.new(@pull_requests)
+    end
 
-    pull_requests.delete_if { |req|
-      t = Time.parse(req[:closed_at]).utc
-      true_classor_false_class = t > since_tag_time
-      classor_false_class = t < till_tag_time
+    def generate_log_between_tags(older_tag, newer_tag)
+      # older_tag nil - means it's first tag, newer_tag nil - means it unreleased section
+      filtered_pull_requests = delete_by_time(@pull_requests, :actual_date, older_tag, newer_tag)
+      filtered_issues = delete_by_time(@issues, :actual_date, older_tag, newer_tag)
 
-      in_range = (true_classor_false_class) && (classor_false_class)
-      !in_range
+      newer_tag_name = newer_tag.nil? ? nil : newer_tag['name']
+      older_tag_name = older_tag.nil? ? nil : older_tag['name']
+
+      if @options[:filter_issues_by_milestone]
+        #delete excess irrelevant issues (according milestones)
+        filtered_issues = filter_by_milestone(filtered_issues, newer_tag_name, @issues)
+        filtered_pull_requests = filter_by_milestone(filtered_pull_requests, newer_tag_name, @pull_requests)
+      end
+
+      if filtered_issues.empty? && filtered_pull_requests.empty? && newer_tag.nil?
+        # do not generate empty unreleased section
+        return nil
+      end
+
+      self.create_log(filtered_pull_requests, filtered_issues, newer_tag, older_tag_name)
+    end
+
+    def filter_by_milestone(filtered_issues, newer_tag_name, src_array)
+      filtered_issues.select! { |issue|
+        # leave issues without milestones
+        if issue.milestone.nil?
+          true
+        else
+          #check, that this milestone in tag list:
+          @all_tags.find { |tag| tag.name == issue.milestone.title }.nil?
+        end
+      }
+      unless newer_tag_name.nil?
+
+        #add missed issues (according milestones)
+        issues_to_add = src_array.select { |issue|
+          if issue.milestone.nil?
+            false
+          else
+            #check, that this milestone in tag list:
+            milestone_is_tag = @all_tags.find { |tag|
+              tag.name == issue.milestone.title
             }
 
-    self.create_log(pull_requests, till_tag_name, till_tag_time)
+            if milestone_is_tag.nil?
+              false
+            else
+              issue.milestone.title == newer_tag_name
+            end
+          end
+        }
+
+        filtered_issues |= issues_to_add
+      end
+      filtered_issues
     end
 
-  def create_log(pull_requests, tag_name, tag_time)
+    def delete_by_time(array, hash_key, older_tag = nil, newer_tag = nil)
 
-    trimmed_tag = tag_name.tr('v', '')
-    log = "## [#{trimmed_tag}] (https://github.com/#{@options[:user]}/#{@options[:project]}/tree/#{tag_name})\n"
+      raise 'At least one of the tags should be not nil!' if (older_tag.nil? && newer_tag.nil?)
 
-    time_string = tag_time.strftime @options[:format]
-    log += "#### #{time_string}\n"
+      newer_tag_time = self.get_time_of_tag(newer_tag)
+      older_tag_time = self.get_time_of_tag(older_tag)
 
-    pull_requests.each { |dict|
-      merge = "#{dict[:title]} [\\##{dict[:number]}](https://github.com/#{@options[:user]}/#{@options[:project]}/pull/#{dict[:number]})\n\n"
-      log += "- #{merge}"
+      array.select { |req|
+        if req[hash_key]
+          t = Time.parse(req[hash_key]).utc
+
+          if older_tag_time.nil?
+            tag_in_range_old = true
+          else
+            tag_in_range_old = t > older_tag_time
+          end
+
+          if newer_tag_time.nil?
+            tag_in_range_new = true
+          else
+            tag_in_range_new = t <= newer_tag_time
+          end
+
+
+          tag_in_range = (tag_in_range_old) && (tag_in_range_new)
+
+          tag_in_range
+        else
+          false
+        end
       }
+    end
+
+    # @param [Array] pull_requests
+    # @param [Array] issues
+    # @param [String] older_tag_name
+    # @return [String]
+    def create_log(pull_requests, issues, newer_tag, older_tag_name = nil)
+
+      newer_tag_time = newer_tag.nil? ? nil : self.get_time_of_tag(newer_tag)
+      newer_tag_name = newer_tag.nil? ? nil : newer_tag['name']
+
+      github_site = options[:github_site] || 'https://github.com'
+      project_url = "#{github_site}/#{@options[:user]}/#{@options[:project]}"
+
+      if newer_tag.nil?
+        newer_tag_name = @options[:unreleased_label]
+        newer_tag_link = 'HEAD'
+        newer_tag_time = Time.new
+      else
+        newer_tag_link = newer_tag_name
+      end
+
+      log = ''
+
+      log += generate_header(log, newer_tag_name, newer_tag_link, newer_tag_time, older_tag_name, project_url)
+
+      if @options[:issues]
+        # Generate issues:
+        issues_a = []
+        enhancement_a = []
+        bugs_a =[]
+
+        issues.each { |dict|
+          added = false
+          dict.labels.each { |label|
+            if label.name == 'bug'
+              bugs_a.push dict
+              added = true
+              next
+            end
+            if label.name == 'enhancement'
+              enhancement_a.push dict
+              added = true
+              next
+            end
+          }
+          unless added
+            issues_a.push dict
+          end
+        }
+
+        log += generate_log_from_array(enhancement_a, @options[:enhancement_prefix])
+        log += generate_log_from_array(bugs_a, @options[:bug_prefix])
+        log += generate_log_from_array(issues_a, @options[:issue_prefix])
+      end
+
+      if @options[:pulls]
+        # Generate pull requests:
+        log += generate_log_from_array(pull_requests, @options[:merge_prefix])
+      end
+
       log
     end
 
-  def get_time_of_tag(prev_tag)
-
-    if @tag_times_hash[prev_tag['name']]
-      return @tag_times_hash[prev_tag['name']]
+    def generate_log_from_array(issues, prefix)
+      log = ''
+      if options[:simple_list].nil? && issues.any?
+        log += "#{prefix}\n\n"
       end
 
+      if issues.any?
+        issues.each { |issue|
+          merge_string = @generator.get_string_for_issue(issue)
+          log += "- #{merge_string}\n\n"
+        }
+      end
+      log
+    end
+
+    def generate_header(log, newer_tag_name, newer_tag_name2, newer_tag_time, older_tag_name, project_url)
+
+      #Generate date string:
+      time_string = newer_tag_time.strftime @options[:format]
+
+      # Generate tag name and link
+      if newer_tag_name.equal? @options[:unreleased_label]
+        log += "## [#{newer_tag_name}](#{project_url}/tree/#{newer_tag_name2})\n\n"
+      else
+        log += "## [#{newer_tag_name}](#{project_url}/tree/#{newer_tag_name2}) (#{time_string})\n\n"
+      end
+
+      if @options[:compare_link] && older_tag_name
+        # Generate compare link
+        log += "[Full Changelog](#{project_url}/compare/#{older_tag_name}...#{newer_tag_name2})\n\n"
+      end
+
+      log
+    end
+
+    def get_time_of_tag(tag_name, tag_times_hash = @tag_times_hash)
+
+      if tag_name.nil?
+        return nil
+      end
+
+      if tag_times_hash[tag_name['name']]
+        return @tag_times_hash[tag_name['name']]
+      end
+
+      github_git_data_commits_get = @github.git_data.commits.get @options[:user], @options[:project], tag_name['commit']['sha']
+      time_string = github_git_data_commits_get['committer']['date']
+      @tag_times_hash[tag_name['name']] = Time.parse(time_string)
+    end
+
+    def get_filtered_issues
+
+      issues = @issues
+
+      filtered_issues = issues
+
+      unless @options[:include_labels].nil?
+        filtered_issues = issues.select { |issue|
+          #add all labels from @options[:incluse_labels] array
+          (issue.labels.map { |label| label.name } & @options[:include_labels]).any?
+        }
+      end
+
+      unless @options[:exclude_labels].nil?
+        filtered_issues = filtered_issues.select { |issue|
+          #delete all labels from @options[:exclude_labels] array
+          !(issue.labels.map { |label| label.name } & @options[:exclude_labels]).any?
+        }
+      end
+
+      if @options[:add_issues_wo_labels]
+        issues_wo_labels = issues.select {
+          # add issues without any labels
+            |issue| !issue.labels.map { |label| label.name }.any?
+        }
+        filtered_issues |= issues_wo_labels
+      end
+
+
       if @options[:verbose]
-      puts "Get time for tag #{prev_tag['name']}"
+        puts "Filtered issues: #{filtered_issues.count}"
       end
 
-    github_git_data_commits_get = @github.git_data.commits.get @options[:user], @options[:project], prev_tag['commit']['sha']
-    time_string = github_git_data_commits_get['committer']['date']
-    Time.parse(time_string)
-    @tag_times_hash[prev_tag['name']] = Time.parse(time_string)
+      filtered_issues
+
+    end
+
+    def fetch_issues_and_pull_requests
+      if @options[:verbose]
+        print "Fetching closed issues...\r"
+      end
+
+      response = @github.issues.list user: @options[:user], repo: @options[:project], state: 'closed', filter: 'all', labels: nil
+
+      issues = []
+      page_i = 0
+      count_pages = response.count_pages
+      response.each_page do |page|
+        page_i += PER_PAGE_NUMBER
+        print "Fetching issues... #{page_i}/#{count_pages * PER_PAGE_NUMBER}\r"
+        issues.concat(page)
+      end
+
+      print "                               \r"
+
+      if @options[:verbose]
+        puts "Received issues: #{issues.count}"
+      end
+
+      # remove pull request from issues:
+      issues_wo_pr = issues.select { |x|
+        x.pull_request == nil
+      }
+      pull_requests = issues.select { |x|
+        x.pull_request != nil
+      }
+      return issues_wo_pr, pull_requests
+    end
+
+    def fetch_event_for_issues_and_pr
+      if @options[:verbose]
+        print "Fetching events for issues and PR: 0/#{@issues.count + @pull_requests.count}\r"
+      end
+
+      # Async fetching events:
+      threads = []
+
+      i = 0
+
+      @issues.each { |issue|
+        threads << Thread.new {
+          obj = @github.issues.events.list user: @options[:user], repo: @options[:project], issue_number: issue['number']
+          issue[:events] = obj.body
+          print "Fetching events for issues and PR: #{i+1}/#{@issues.count + @pull_requests.count}\r"
+          i +=1
+        }
+      }
+
+      @pull_requests.each { |pull_request|
+        threads << Thread.new {
+          obj = @github.issues.events.list user: @options[:user], repo: @options[:project], issue_number: pull_request['number']
+          pull_request[:events] = obj.body
+          print "Fetching events for issues and PR: #{i+1}/#{@issues.count + @pull_requests.count}\r"
+          i +=1
+        }
+      }
+
+      threads.each { |thr| thr.join }
+
+      #to clear line from prev print
+      print "                                                            \r"
+
+      if @options[:verbose]
+        puts "Fetching events for issues and PR: Done! #{i}/#{@issues.count + @pull_requests.count}"
+      end
+    end
+
+  end
+
+  if __FILE__ == $0
+    GitHubChangelogGenerator::ChangelogGenerator.new.compund_changelog
   end
 
 end
-
-if __FILE__ == $0
-  ChangelogGenerator.new.compund_changelog
-end

lib/github_changelog_generator/generator.rb

@@ -0,0 +1,39 @@
+module GitHubChangelogGenerator
+  class Generator
+
+    def initialize(options = nil)
+      @options = options
+    end
+
+    def get_string_for_issue(issue)
+      encapsulated_title = self.encapsulate_string issue[:title]
+
+      title_with_number = "#{encapsulated_title} [\\##{issue[:number]}](#{issue.html_url})"
+
+      unless issue.pull_request.nil?
+        if @options[:author]
+          if issue.user.nil?
+            title_with_number += " ({Null user})"
+          else
+            title_with_number += " ([#{issue.user.login}](#{issue.user.html_url}))"
+          end
+        end
+      end
+      title_with_number
+    end
+
+    def encapsulate_string(string)
+
+      string.gsub! '\\', '\\\\'
+
+      encpas_chars = %w(> * _ \( \) [ ] #)
+      encpas_chars.each { |char|
+        string.gsub! char, "\\#{char}"
+      }
+
+      string
+    end
+
+  end
+
+end

lib/github_changelog_generator/parser.rb

@@ -1,43 +1,142 @@
 #!/usr/bin/env ruby
 require 'optparse'
+require 'pp'
+require_relative 'version'
 
-class Parser
+module GitHubChangelogGenerator
+  class Parser
     def self.parse_options
-    options = {:tag1 => nil, :tag2 => nil, :format => '%d/%m/%y'}
+
+      options = {
+          :tag1 => nil,
+          :tag2 => nil,
+          :format => '%Y-%m-%d',
+          :output => 'CHANGELOG.md',
+          :exclude_labels => %w(duplicate question invalid wontfix),
+          :pulls => true,
+          :issues => true,
+          :verbose => true,
+          :add_issues_wo_labels => true,
+          :add_pr_wo_labels => true,
+          :merge_prefix => '**Merged pull requests:**',
+          :issue_prefix => '**Closed issues:**',
+          :bug_prefix => '**Fixed bugs:**',
+          :enhancement_prefix => '**Implemented enhancements:**',
+          :author => true,
+          :filter_issues_by_milestone => true,
+          :compare_link => true,
+          :unreleased => true,
+          :unreleased_label => 'Unreleased'
+      }
 
       parser = OptionParser.new { |opts|
-      opts.banner = 'Usage: changelog_generator -u user_name -p project_name [-t 16-digit-GitHubToken] [options]'
-      opts.on('-u', '--user [USER]', 'your username on GitHub') do |last|
+        opts.banner = 'Usage: github_changelog_generator [options]'
+        opts.on('-u', '--user [USER]', 'Username of the owner of target GitHub repo') do |last|
           options[:user] = last
         end
-      opts.on('-p', '--project [PROJECT]', 'name of project on GitHub') do |last|
+        opts.on('-p', '--project [PROJECT]', 'Name of project on GitHub') do |last|
           options[:project] = last
         end
-      opts.on('-t', '--token [TOKEN]', 'To make more than 50 requests this app required your OAuth token for GitHub. You can generate it on https://github.com/settings/applications') do |last|
+        opts.on('-t', '--token [TOKEN]', 'To make more than 50 requests per hour your GitHub token required. You can generate it here: https://github.com/settings/tokens/new') do |last|
           options[:token] = last
         end
+        opts.on('-f', '--date-format [FORMAT]', 'Date format. Default is %d/%m/%y') do |last|
+          options[:format] = last
+        end
+        opts.on('-o', '--output [NAME]', 'Output file. Default is CHANGELOG.md') do |last|
+          options[:output] = last
+        end
+        opts.on('--[no-]issues', 'Include closed issues to changelog. Default is true') do |v|
+          options[:issues] = v
+        end
+        opts.on('--[no-]issues-wo-labels', 'Include closed issues without labels to changelog. Default is true') do |v|
+          options[:add_issues_wo_labels] = v
+        end
+        opts.on('--[no-]pr-wo-labels', 'Include pull requests without labels to changelog. Default is true') do |v|
+          options[:add_pr_wo_labels] = v
+        end
+        opts.on('--[no-]pull-requests', 'Include pull-requests to changelog. Default is true') do |v|
+          options[:pulls] = v
+        end
+        opts.on('--[no-]filter-by-milestone', 'Use milestone to detect when issue was resolved. Default is true') do |last|
+          options[:filter_issues_by_milestone] = last
+        end
+        opts.on('--[no-]author', 'Add author of pull-request in the end. Default is true') do |author|
+          options[:author] = author
+        end
+        opts.on('--unreleased-only', 'Generate log from unreleased closed issues only.') do |v|
+          options[:unreleased_only] = v
+        end
+        opts.on('--[no-]unreleased', 'Add to log unreleased closed issues. Default is true') do |v|
+          options[:unreleased] = v
+        end
+        opts.on('--unreleased-label [label]', 'Add to log unreleased closed issues. Default is true') do |v|
+          options[:unreleased_label] = v
+        end
+        opts.on('--[no-]compare-link', 'Include compare link (Full Changelog) between older version and newer version. Default is true') do |v|
+          options[:compare_link] = v
+        end
+        opts.on('--include-labels  x,y,z', Array, 'Issues only with that labels will be included to changelog. Default is \'bug,enhancement\'') do |list|
+          options[:include_labels] = list
+        end
+        opts.on('--exclude-labels  x,y,z', Array, 'Issues with that labels will be always excluded from changelog. Default is \'duplicate,question,invalid,wontfix\'') do |list|
+          options[:exclude_labels] = list
+        end
+        opts.on('--github-site [URL]', 'The Enterprise Github site on which your project is hosted.') do |last|
+          options[:github_site] = last
+        end
+        opts.on('--github-api [URL]', 'The enterprise endpoint to use for your Github API.') do |last|
+          options[:github_endpoint] = last
+        end
+        opts.on('--simple-list', 'Create simple list from issues and pull requests. Default is false.') do |v|
+          options[:simple_list] = v
+        end
+        opts.on('--[no-]verbose', 'Run verbosely. Default is true') do |v|
+          options[:verbose] = v
+        end
+        opts.on('-v', '--version', 'Print version number') do |v|
+          puts "Version: #{GitHubChangelogGenerator::VERSION}"
+          exit
+        end
         opts.on('-h', '--help', 'Displays Help') do
           puts opts
           exit
         end
-      opts.on('-v', '--[no-]verbose', 'Run verbosely') do |v|
-        options[:verbose] = v
-      end
-      opts.on('-l', '--last-changes', 'generate log between last 2 tags') do |last|
-        options[:last] = last
-      end
-      opts.on('-f', '--date-format [FORMAT]', 'date format. default is %d/%m/%y') do |last|
-        options[:format] = last
-      end
       }
 
       parser.parse!
 
-    #udefined case with 1 parameter:
       if ARGV[0] && !ARGV[1]
-      puts parser.banner
+        github_site = options[:github_site] ? options[:github_site] : 'github.com'
+        # this match should parse  strings such "https://github.com/skywinder/Github-Changelog-Generator" or "skywinder/Github-Changelog-Generator" to user and name
+        match = /(?:.+#{Regexp.escape(github_site)}\/)?(.+)\/(.+)/.match(ARGV[0])
+
+        begin
+          param = match[2].nil?
+        rescue
+          puts "Can't detect user and name from first parameter: '#{ARGV[0]}' -> exit'"
           exit
         end
+        if param
+          exit
+        else
+          options[:user] = match[1]
+          options[:project]= match[2]
+        end
+
+
+      end
+
+      if !options[:user] && !options[:project]
+        remote = `git remote -vv`.split("\n")
+        match = /.*(?:[:\/])((?:-|\w|\.)*)\/((?:-|\w|\.)*)?(?:\.git).*/.match(remote[0])
+
+        if match && match[1] && match[2]
+          puts "Detected user:#{match[1]}, project:#{match[2]}"
+          options[:user], options[:project] = match[1], match[2]
+        end
+      end
+
 
       if !options[:user] || !options[:project]
         puts parser.banner
@@ -47,9 +146,15 @@ class Parser
       if ARGV[1]
         options[:tag1] = ARGV[0]
         options[:tag2] = ARGV[1]
+      end
 
+      if options[:verbose]
+        puts 'Performing task with options:'
+        pp options
+        puts ''
       end
 
       options
     end
+  end
 end

lib/github_changelog_generator/version.rb

@@ -0,0 +1,3 @@
+module GitHubChangelogGenerator
+  VERSION = '1.3.6'
+end