Find repeated strings that could be replaced by a constant.
There are obvious benefits to using constants instead of repeating strings, mostly to ease maintenance. Cannot argue against changing a single constant versus many strings.
While this could be considered a beginner mistake, across time, multiple packages and large codebases, some repetition could have slipped in.
$ go get github.com/jgautheron/goconst/cmd/goconst $ goconst ./...
Usage: goconst ARGS <directory> Flags: -ignore exclude files matching the given regular expression -ignore-tests exclude tests from the search (default: true) -min-occurrences report from how many occurrences (default: 2) -min-length only report strings with the minimum given length (default: 3) -match-constant look for existing constants matching the values -numbers search also for duplicated numbers -min minimum value, only works with -numbers -max maximum value, only works with -numbers -output output formatting (text or json) Examples: goconst ./... goconst -ignore "yacc|\.pb\." $GOPATH/src/github.com/cockroachdb/cockroach/... goconst -min-occurrences 3 -output json $GOPATH/src/github.com/cockroachdb/cockroach goconst -numbers -min 60 -max 512 .
Other static analysis tools
- gogetimports: Get a JSON-formatted list of imports.
- usedexports: Find exported variables that could be unexported.