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-# dlang-bot
-Dlang-bot for automated bugzilla, github, and trello references.
-Also cancels stale Travis-CI builds
+# Dlang-Bot
-
+[](https://travis-ci.org/dlang-bots/dlang-bot)
+[](https://codecov.io/gh/dlang-bots/dlang-bot)
+
+
+
+Features
+--------
+
+- [Automated bugzilla, github, and trello references](#automated-references)
+- [Auto-merging approved & passing PRs](#auto-merge)
+- [Canceling stale Travis-CI builds](#canceling-stale)
+
+
+
+
+Automated references
+--------------------
+
+For example let's say you fixed [Issue 16582](https://issues.dlang.org/show_bug.cgi?id=16582)
+and make a PR for on GitHub.
+If one of your commits mentions the issue, e.g. like this Git commit message:
+
+```
+fix Issue 16582 - ParameterDefaults fails w/ scope parameter
+```
+
+The Dlang-Bot will do all the hard work of linking and referencing
+between Bugzilla, GitHub and Trello do for you.
+
+### GitHub
+
+It would comment on GitHub with list of all mentioned issues and link them to Bugzilla:
+
+
+
+The first column of the table is the current status of the referenced issue.
+
+### Trello
+
+For the [Trello board](https://trello.com/b/XoFjxiqG/active) it will also provide a
+reference:
+
+
+
+And once a PR gets merged, the bot moves the linked Trello card to "Testing / Review".
+
+### Bugzilla
+
+Once a PR has been merged (i.e. the commits got pushed to master or stable),
+GitHub's Bugzilla integration will automatically comment to Bugzilla with a regarding commit:
+
+
+
+Of course it will also automatically close the references issues (at least if either
+"fix", "close" or "address" occurs before the issue id).
+
+Using this syntax is also very important because for the changelog generation, the
+git history will be used. Thus _only_ if the Dlang-Bot has detected an issue
+and commented on your PR it can become part of the changelog.
+
+### Nerdy details
+
+- one can mention multiple issues in one commit and/or multiple commits
+- the exact RegEx is:
+
+```
+((close|fix|address)e?(s|d)? )?(ticket|bug|tracker item|issue)s?:? *([\d ,\+and]+)
+```
+
+(the GitHub Bugzilla integration and the Dlang-Bot use the same RegEx to parse
+git commit messages)
+
+
+
+Auto-merge (WIP)
+---------------
+
+At the moment the Dlang-Bot supports merging via special `auto-merge` and
+`auto-merge-squash` labels. The later will perform a squashed merge of all commits
+in the PR into a single one.
+
+A reviewer can toggle a PR for "auto-merge" by simply adding the `auto-merge` label
+(`auto-merge-squash` respectively).
+
+
+### Nerdy details
+
+- this relies on the "restricted branches" feature of GitHub (the Dlang-Bot will
+send the attempt to merge to the GitHub API)
+- once a new commit event occurs (push, synchronization) the Dlang-Bot will
+automatically remove set all auto-merge labels from the PR
+- for status events the GitHub API doesn't allow to get an information about the
+- the Dlang-Bot will then try to restart the PR on every new event.
+- concerning PR of the commit (thus all potential auto-merge PRs are checked)
+
+_Note_: at the moment the Dlang-Bot doesn't store _any_ authentication token, so
+it can't perform actions on behalf of others.
+
+
+
+Canceling stale Travis-CI builds
+--------------------------------
+
+To avoid wasteful resource consumption with Travis CI,
+the Dlang-Bot will automatically cancel the previous, possibly running build of
+a PR on a new commit event (push or synchronization by a user).
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