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Implemented ability to add build tags only to generator via -gen_build_flags #386

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Implemented ability to add build tags only to generator via -gen_build_flags #386

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31 changes: 27 additions & 4 deletions bootstrap/bootstrap.go
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Original file line number Diff line number Diff line change
Expand Up @@ -14,13 +14,19 @@ import (
"path/filepath"
"regexp"
"sort"
"strings"
)

const genPackage = "github.com/mailru/easyjson/gen"
const pkgWriter = "github.com/mailru/easyjson/jwriter"
const pkgLexer = "github.com/mailru/easyjson/jlexer"
const (
genPackage = "github.com/mailru/easyjson/gen"
pkgWriter = "github.com/mailru/easyjson/jwriter"
pkgLexer = "github.com/mailru/easyjson/jlexer"
)

var buildFlagsRegexp = regexp.MustCompile("'.+'|\".+\"|\\S+")
var (
buildFlagsRegexp = regexp.MustCompile("'.+'|\".+\"|\\S+")
tagsBuildFlagRegexp = regexp.MustCompile("^-?-tags=")
)

type Generator struct {
PkgPath, PkgName string
Expand Down Expand Up @@ -158,6 +164,21 @@ func (g *Generator) writeMain() (path string, err error) {
return dest, os.Rename(src, dest)
}

func findBuildTags(buildFlags []string) string {
for _, flag := range buildFlags {
prefix := tagsBuildFlagRegexp.FindString(flag)

if prefix == "" {
continue
}

res, _ := strings.CutPrefix(flag, prefix)

return " " + strings.ReplaceAll(res, ",", " ")
}
return ""
}

func (g *Generator) Run() error {
if err := g.writeStub(); err != nil {
return err
Expand Down Expand Up @@ -185,9 +206,11 @@ func (g *Generator) Run() error {
execArgs := []string{"run"}
if g.GenBuildFlags != "" {
buildFlags := buildFlagsRegexp.FindAllString(g.GenBuildFlags, -1)
g.BuildTags += findBuildTags(buildFlags)
execArgs = append(execArgs, buildFlags...)
}
execArgs = append(execArgs, "-tags", g.BuildTags, filepath.Base(path))

cmd := exec.Command("go", execArgs...)

cmd.Stdout = f
Expand Down