mirror of
https://github.com/matrix-org/dendrite
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60 lines
1.8 KiB
Markdown
60 lines
1.8 KiB
Markdown
# Code Style
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In addition to standard Go code style (`gofmt`, `goimports`), we use `golangci-lint`
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to run a number of linters, the exact list can be found under linters in [.golangci.yml](.golangci.yml).
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[Installation](https://github.com/golangci/golangci-lint#install) and [Editor
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Integration](https://github.com/golangci/golangci-lint#editor-integration) for
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it can be found in the readme of golangci-lint.
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For rare cases where a linter is giving a spurious warning, it can be disabled
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for that line or statement using a [comment
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directive](https://github.com/golangci/golangci-lint#nolint), e.g. `var
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bad_name int //nolint:golint,unused`. This should be used sparingly and only
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when its clear that the lint warning is spurious.
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The linters can be run using [scripts/find-lint.sh](scripts/find-lint.sh)
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(see file for docs) or as part of a build/test/lint cycle using
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[scripts/build-test-lint.sh](scripts/build-test-lint.sh).
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## Labels
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In addition to `TODO` and `FIXME` we also use `NOTSPEC` to identify deviations
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from the Matrix specification.
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## Logging
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We generally prefer to log with static log messages and include any dynamic
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information in fields.
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```golang
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logger := util.GetLogger(ctx)
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// Not recommended
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logger.Infof("Finished processing keys for %s, number of keys %d", name, numKeys)
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// Recommended
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logger.WithFields(logrus.Fields{
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"numberOfKeys": numKeys,
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"entityName": name,
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}).Info("Finished processing keys")
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```
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This is useful when logging to systems that natively understand log fields, as
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it allows people to search and process the fields without having to parse the
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log message.
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## Visual Studio Code
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If you use VSCode then the following is an example of a workspace setting that
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sets up linting correctly:
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```json
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{
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"go.lintTool":"golangci-lint",
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"go.lintFlags": [
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"--fast"
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]
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}
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```
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