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116 lines
4.9 KiB
Markdown
116 lines
4.9 KiB
Markdown
# COMMITS
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<div class=pagetoc>
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<!-- toc -->
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</div>
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## When committing / reviewing commits
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Follow/encourage the commit conventions (see below).
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Here they are in brief:
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- Commit messages must begin with a prefix, one or more colon-terminated words
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indicating the [topic](CONTRIBUTING.html#topics).
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- Commits causing user-visible changes must additionally begin with `feat:`, `imp:` or `fix:`
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(feature, improvement, or bugfix). These will be mentioned in release notes.
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- Add a leading `;` to commits where a CI build is not needed, to reduce waste.
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- Add a `!` to highlight commits causing breaking/incompatible changes.
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- Mention any relevant issue numbers, usually parenthesised at the end. `(#NNNN)`
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- Try to write commit messages as changelog-ready documentation that will tell their
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intended audience (which might be users, installers, packagers, and/or developers)
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what they need to know.
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## When committing / pushing / merging:
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- run `tools/commitlintnt` before push, to check recent commits
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- or, run it automatically before each commit (`make installcommithook` to configure your local repo)
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- it also runs in CI on github for pull requests, etc.
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## Commit conventions
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Since the 1.23 release cycle, we try to follow certain conventions for commit messages, to
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- encourage considered, focussed, well documented changes
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- reduce the cost of code review, maintaining changelogs and release notes, and releasing
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- increase our throughput (rate of shipping useful, reliable, documented, maintainable features)
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**hledger commit conventions:**
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1. Commit messages in hledger's main repo follow this pattern:
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```
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type: [optionaltopic:] summary
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[Optional description, more details here when needed.]
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```
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2. Every top-level commit must have a type prefix, ending with a colon and optional space.
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This indicates the change's intended audience and the general type of change.
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Here are the current types:
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- **Changes visible to end users** (including users of hledger-web's HTTP API).
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These will appear in release notes and changelogs:
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- `feat` - a new feature
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- `imp` - an improvement to existing features
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- `fix` - a bugfix
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- **Changes affecting packagers, builders, and library users**.
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These will appear in changelogs:
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- `cha` - a generic package/lib change. Or, one of these specific types:
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- `pkg` - something to do with the haskell packages, dependencies etc.
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- `lib` - a change in the package's library API
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- ...some other type that seems useful...
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- **Changes interesting only to hledger developers/documentors/debuggers**.
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These will usually appear only in the commit history, not in changelogs or release notes:
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- `dev` - a generic developer change. Or, one of these specific types:
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- `ref` - refactoring
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- `cln` - cleanup
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- `doc` - documentation-related
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- `test` - tests-related
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- `ci` - continuous integration-related
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- ...some other type that seems useful...
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There's a bit of ambiguity/overlap between the cha/dev types and topics.
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Eg the `doc` type indicates a boring doc change, but there's also a `doc` topic
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which might be used for interesting doc changes, as in `feat:doc:...`. TBD.
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3. If this is a "breaking change", introducing a compatibility or
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migration issue, the type is followed by `!`, and the issue
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and advice to users are included in the description.
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This will most often be seen with the end-user types, eg:
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`feat!:`, `imp!:`, `fix!:`.
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4. If the first character of the commit message is `;`, this commit
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(more precisely, the push ending with this commit) will be excluded
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from the usual CI checks. Our CI tends to do a lot of building, so
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you can use this to save energy and carbon emissions when pushing
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harmless changes.
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5. A topic prefix, and maybe even a subtopic prefix, can be added
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before the summary if useful. These are standard prefixes similar
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to what I have been using for some time, see [topics](#topics).
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They help with readability in the commit history, changelogs and release notes.
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6. Any relevant issues should be mentioned, often parenthesised at
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the end of the summary: `(#NNNN)`.
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7. The summary, and description if any, communicate this change's
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purpose as clearly as possible to its intended audience:
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end users, builders/packagers/library users, or developers/debuggers.
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The text (or its first sentence/first paragraphs) should be ready
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for use in changelogs/release notes when applicable.
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Crafting good commit messages (and thereby good commits, good change
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documentation, easier code review, faster merging) is an art and a
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habit. Just use your best judgement and we'll check and polish
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as part of CI and code review. Examples will be added here in due course.
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Related:
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- <https://groups.google.com/g/hledger/c/t14xwHQMJqU/m/9frARXIdAAAJ>
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- <https://conventionalcommits.org>
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- <https://git.savannah.gnu.org/cgit/emacs.git/plain/CONTRIBUTE> -> Commit messages
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