2013-09-26 02:43:42 +00:00
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Git Commit Convention
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=====================
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We are using the following convention for writing git-commit messages.
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It is based on the one from AngularJS project([doc][angularjs-doc],
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[commits][angularjs-git]).
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[angularjs-git]: https://github.com/angular/angular.js/commits/master
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[angularjs-doc]: https://docs.google.com/document/d/1QrDFcIiPjSLDn3EL15IJygNPiHORgU1_OOAqWjiDU5Y/edit#
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Format of the commit message
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----------------------------
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<type>(<scope>): <subject>
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<NEWLINE>
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<body>
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<NEWLINE>
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<footer>
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``<type>`` is:
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- feat (feature)
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- fix (bug fix)
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- doc (documentation)
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- style (formatting, missing semicolons, ...)
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- refactor
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- test (when adding missing tests)
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- chore (maintain, ex: travis-ci)
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2013-10-25 16:23:14 +00:00
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- perf (performance improvement, optimization, ...)
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2013-09-26 02:43:42 +00:00
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``<scope>`` is a name of module or a directory which contains changed modules. For instance,
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it could be
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- kernel/expr
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- kernel
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- library/rewrite
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``<subject>`` has the following constraints:
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- use imperative, present tense: "change" not "changed" nor "changes"
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- do not capitalize the first letter
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- no dot(.) at the end
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``<body>`` has the following constraints:
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- just as in ``<subject>``, use imperative, present tense
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- includes motivation for the change and contrasts with previous
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behavior
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``<footer>`` is optional and may contain two items:
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- Breaking changes: All breaking changes have to be mentioned in
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footer with the description of the change, justification and
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migration notes
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- Referencing issues: Closed bugs should be listed on a separate line
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in the footer prefixed with "Closes" keyword like this:
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Closes #123, #456
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Examples
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--------
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fix(kernel): add declarations for operator<<(std::ostream&, expr const&) and operator<<(std::ostream&, context const&) in the kernel
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The actual implementation of these two operators is outside of the
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kernel. They are implemented in the file 'library/printer.cpp'. We
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declare them in the kernel to prevent the following problem. Suppose
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there is a file 'foo.cpp' that does not include 'library/printer.h',
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but contains
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expr a;
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...
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std::cout << a << "\n";
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...
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The compiler does not generate an error message. It silently uses the
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operator bool() to coerce the expression into a Boolean. This produces
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counter-intuitive behavior, and may confuse developers.
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