goconst – find repeated literals that could be constants

goconst is a static analysis utility for Go that finds repeated literals which may be better represented as constants.

Replacing duplicated values with named constants can reduce maintenance work and make intent clearer, particularly in larger codebases where the same literal may appear across multiple files or packages. The program analyses source syntax rather than simply searching text, which lets it apply Go-aware filtering and report useful source locations.

This is free and open source software.

Key Features

• Detects repeated string literals and can optionally inspect duplicated numeric literals.
• Lets users set the minimum number of occurrences before a value is reported.
• Supports a minimum string length measured in runes, so multi-byte characters are handled correctly.
• Can search for existing constants whose values match repeated literals.
• Can identify separate constants that share the same value.
• Optionally evaluates constant expressions when matching against existing constants.
• Can ignore test files during analysis.
• Offers regular-expression filtering for files and literal values that should be skipped.
• Can ignore literals passed to selected functions such as logging or error-formatting calls.
• Can omit literals used inside composite literals or as map keys.
• Provides minimum and maximum value filters when checking numbers.
• Supports text and JSON output, including grouped text output.
• Can return a distinct exit status when findings are detected, which is useful in automated checks.
• Supports analysis of multiple directories and Go package trees from the command line.

Website: github.com/jgautheron/goconst
Support:
Developer: jgautheron
License: MIT License

goconst is written in Go. Learn Go with our recommended free books and free tutorials.

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