treewide: add gofmt linter
Change-Id: Ic0d8450b46790c4dc797b117634227be9a48de01
Reviewed-on: https://review.monogon.dev/c/monogon/+/3827
Reviewed-by: Leopold Schabel <leo@monogon.tech>
Tested-by: Jenkins CI
diff --git a/build/analysis/gofmt/BUILD.bazel b/build/analysis/gofmt/BUILD.bazel
new file mode 100644
index 0000000..2c5835b
--- /dev/null
+++ b/build/analysis/gofmt/BUILD.bazel
@@ -0,0 +1,13 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+ name = "gofmt",
+ srcs = ["gofmt.go"],
+ importpath = "source.monogon.dev/build/analysis/gofmt",
+ visibility = ["//visibility:public"],
+ deps = [
+ "//build/analysis/lib",
+ "@com_github_golangci_gofmt//gofmt",
+ "@org_golang_x_tools//go/analysis",
+ ],
+)
diff --git a/build/analysis/gofmt/gofmt.go b/build/analysis/gofmt/gofmt.go
new file mode 100644
index 0000000..817ce05
--- /dev/null
+++ b/build/analysis/gofmt/gofmt.go
@@ -0,0 +1,55 @@
+package gofmt
+
+import (
+ "bytes"
+ "os"
+
+ "github.com/golangci/gofmt/gofmt"
+ "golang.org/x/tools/go/analysis"
+
+ alib "source.monogon.dev/build/analysis/lib"
+)
+
+var Analyzer = &analysis.Analyzer{
+ Name: "gofmt",
+ Doc: "checks if files have been run through `gofmt -s`",
+ Run: func(pass *analysis.Pass) (any, error) {
+ for _, f := range pass.Files {
+ if alib.IsGeneratedFile(f) {
+ continue
+ }
+
+ fileName := pass.Fset.PositionFor(f.Pos(), true).Filename
+ src, err := os.ReadFile(fileName)
+ if err != nil {
+ return nil, err
+ }
+
+ res, err := gofmt.Source(fileName, src, gofmt.Options{NeedSimplify: true})
+ if err != nil {
+ return nil, err
+ }
+
+ if bytes.Equal(src, res) {
+ continue
+ }
+
+ pass.Report(analysis.Diagnostic{
+ Pos: f.Pos(),
+ Message: "not formatted with gofmt -s",
+ SuggestedFixes: []analysis.SuggestedFix{
+ {
+ TextEdits: []analysis.TextEdit{
+ {
+ Pos: f.FileStart,
+ End: f.FileEnd,
+ NewText: res,
+ },
+ },
+ },
+ },
+ })
+ }
+ return nil, nil
+ },
+}