gofmt

What gofmt is

gofmt is the Go source formatter included with Go installations, available on Linux, macOS, and Windows. It formats Go programs with tabs for indentation and spaces for alignment. Run without a path, it reads standard input; given a directory, it processes .go files recursively and skips files whose names begin with a period. Its default output is reformatted source on standard output. Flags can show differences, identify files that need formatting, apply rewrite rules, simplify code, or report all errors. The rewrite option uses patterns and replacements written as valid Go expressions. gofmt also reshapes Go documentation comments into standard paragraphs, lists, headings, links, and code blocks. Editor integrations are documented for Vim, Emacs, Eclipse, and Sublime Text, as well as Git pre-commit hooks and Mercurial. Since Go 1.18, it reads and formats files concurrently, with memory use limited in proportion to GOMAXPROCS. The executable is equivalent to `go fmt`. It is free and distributed as part of the open-source Go project under a BSD-style license.