1 files changed, 74 insertions, 0 deletions
diff --git a/reloadIsTracked.go b/reloadIsTracked.go
new file mode 100644
index 0000000..9e44b2a
--- /dev/null
+++ b/reloadIsTracked.go
@@ -0,0 +1,74 @@
+package gitpb
+
+import (
+	"errors"
+	"fmt"
+
+	"go.wit.com/log"
+)
+
+func (repo *Repo) isTracked(file string) (bool, error) {
+	cmd := []string{"git", "ls-files", "--error-unmatch", file}
+	result := repo.Run(cmd)
+	if result.Error != nil {
+		return false, result.Error
+	}
+	if result.Exit != 0 {
+		return false, nil
+	}
+	return true, nil
+}
+
+func (repo *Repo) isIgnored(file string) (bool, error) {
+	cmd := []string{"git", "check-ignore", "-q", file}
+	result := repo.Run(cmd)
+	if result.Error != nil {
+		return false, result.Error
+	}
+	if result.Exit == 0 {
+		// exit with 0 means the file is ignored
+		return true, nil
+	}
+	// non-zero exit means the file is not ignored
+	return false, nil
+}
+
+// is it a good idea to run go-mod-clean in this repo?
+// for now, check if this repo should be ignored
+// TODO: go.mod and go.sum should be moved to git tag metadata
+func (repo *Repo) RepoIgnoresGoMod() error {
+	repo.GoInfo.GitIgnoresGoSum = false
+	file := "go.mod"
+	if tracked, err := repo.isTracked(file); err != nil {
+		msg := fmt.Sprintf("%s Error checking if %s tracked: %v\n", repo.GoPath, file, err)
+		log.Info("gitpb:", msg)
+		return err
+	} else {
+		if tracked {
+			msg := fmt.Sprintf("%s %s is tracked by Git.\n", repo.GoPath, file)
+			log.Info("gitpb:", msg)
+			return errors.New(msg)
+		}
+	}
+
+	if ignored, err := repo.isIgnored(file); err != nil {
+		if err != nil {
+			msg := fmt.Sprintf("%s Error checking if ignored: %v\n", repo.GoPath, err)
+			log.Info("gitpb:", msg)
+			return err
+		}
+	} else {
+		if ignored {
+			fmt.Printf("%s %s is ignored by Git.\n", repo.GoPath, file)
+			repo.GoInfo.GitIgnoresGoSum = true
+			return nil
+		}
+	}
+	msg := fmt.Sprintf("%s %s is neither tracked nor ignored by Git.\n", repo.GoPath, file)
+	// this means, if you make a go.mod file, it'll add it to the repo to be tracked
+	// so you need to either add it to .gitignore (this is what should happen)
+	// or accept you want an auto-generated file to put endless garbage in your git repo
+	// this obviously exposes my opinion on this subject matter
+	log.Info("gitpb:", msg)
+	return errors.New(msg)
+}