1 files changed, 174 insertions, 0 deletions
diff --git a/mtime.go b/mtime.go
new file mode 100644
index 0000000..17cec9c
--- /dev/null
+++ b/mtime.go
@@ -0,0 +1,174 @@
+package gitpb
+
+// An app to submit patches for the 30 GO GUI repos
+
+import (
+	"fmt"
+	"time"
+
+	"go.wit.com/lib/gui/shell"
+	"go.wit.com/log"
+	"google.golang.org/protobuf/types/known/timestamppb"
+)
+
+func (repo *Repo) Mtime(fname string) *time.Time {
+	var fileTime *time.Time
+	tmp, err := repo.oldMtime(fname)
+	fileTime = &tmp
+	if err != nil {
+		log.Info("MTime got err", err)
+		return nil
+	}
+	return fileTime
+}
+
+func (repo *Repo) changedDir() bool {
+	fname := ".git"
+	fileTime := repo.Mtime(fname)
+	if fileTime == nil {
+		// .git doesn't exist. something is wrong. rescan this repo
+		return true
+	}
+	mtime := timestamppb.New(*fileTime)
+	pbtime := repo.Times.MtimeDir
+	if pbtime == nil { // this can happen?
+		repo.Times.MtimeDir = mtime
+		return true
+	}
+	if (pbtime.Seconds == mtime.Seconds) && (pbtime.Nanos == mtime.Nanos) {
+		return false
+	}
+	dur := mtime.AsTime().Sub(pbtime.AsTime())
+	repo.StateChange = fmt.Sprintf("%s changed %s", fname, shell.FormatDuration(dur))
+	repo.Times.MtimeDir = mtime
+	return true
+}
+
+func (repo *Repo) didFileChange(fname string, pbtime *timestamppb.Timestamp) bool {
+	fileTime := repo.Mtime(fname)
+	if fileTime == nil {
+		// file missing, assume changed
+		return true
+	}
+	mtime := timestamppb.New(*fileTime)
+	if pbtime == nil {
+		// mtime has not been stored yet
+		return true
+	}
+	if (pbtime.Seconds == mtime.Seconds) && (pbtime.Nanos == mtime.Nanos) {
+		// it's the same!
+		return false
+	}
+	// need to reload from the filesystem
+	return false
+}
+
+// boo. I'm not good at golang. this should use reflect. I'm bad. my code is bad. boo this man. you're cool, I'm outta here
+// make this work right someday
+func (repo *Repo) updateMtime(fname string, pbname string) bool {
+	fileTime := repo.Mtime(fname)
+	if fileTime == nil {
+		// .git/HEAD doesn't exist. something is wrong. rescan this repo
+		return true
+	}
+	mtime := timestamppb.New(*fileTime)
+	pbtime := repo.Times.MtimeHead
+	if pbtime == nil { // this can happen?
+		repo.Times.MtimeHead = mtime
+		return true
+	}
+	switch pbname {
+	case "MtimeHead":
+		if pbtime == nil { // this can happen?
+			repo.Times.MtimeHead = mtime
+			return true
+		}
+	default:
+	}
+	if (pbtime.Seconds == mtime.Seconds) && (pbtime.Nanos == mtime.Nanos) {
+		return false
+	}
+	dur := mtime.AsTime().Sub(pbtime.AsTime())
+	repo.StateChange = fmt.Sprintf("%s changed %s", fname, shell.FormatDuration(dur))
+	repo.Times.MtimeHead = mtime
+	return true
+}
+
+func (repo *Repo) changedHead() bool {
+	fname := ".git/HEAD"
+	fileTime := repo.Mtime(fname)
+	if fileTime == nil {
+		// .git/HEAD doesn't exist. something is wrong. rescan this repo
+		return true
+	}
+	mtime := timestamppb.New(*fileTime)
+	pbtime := repo.Times.MtimeHead
+	if pbtime == nil { // this can happen?
+		repo.Times.MtimeHead = mtime
+		return true
+	}
+
+	if (pbtime.Seconds == mtime.Seconds) && (pbtime.Nanos == mtime.Nanos) {
+		return false
+	}
+	dur := mtime.AsTime().Sub(pbtime.AsTime())
+	repo.StateChange = fmt.Sprintf("%s changed %s", fname, shell.FormatDuration(dur))
+	repo.Times.MtimeHead = mtime
+	return true
+}
+
+func (repo *Repo) changedIndex() bool {
+	fname := ".git/index"
+	fileTime := repo.Mtime(fname)
+	if fileTime == nil {
+		// .git/index doesn't exist. something is wrong. rescan this repo
+		return true
+	}
+	mtime := timestamppb.New(*fileTime)
+	pbtime := repo.Times.MtimeIndex
+	if pbtime == nil { // this can happen?
+		repo.Times.MtimeIndex = mtime
+		return true
+	}
+	if (pbtime.Seconds == mtime.Seconds) && (pbtime.Nanos == mtime.Nanos) {
+		return false
+	}
+	dur := mtime.AsTime().Sub(pbtime.AsTime())
+	repo.StateChange = fmt.Sprintf("%s changed %s", fname, shell.FormatDuration(dur))
+	repo.Times.MtimeIndex = mtime
+	return true
+}
+
+func (repo *Repo) updateMtimes() bool {
+	var changed bool
+	if repo.Times == nil {
+		repo.Times = new(GitTimes)
+		log.Info(repo.FullPath, "repo.Times were nil")
+	}
+
+	if repo.changedHead() {
+		changed = true
+	}
+	if repo.changedIndex() {
+		changed = true
+	}
+	if repo.changedDir() {
+		// changed = true
+	}
+
+	return changed
+}
+
+func (repo *Repo) DidRepoChange() bool {
+	if repo.didFileChange(".git/HEAD", repo.Times.MtimeHead) {
+		return true
+	}
+	if repo.didFileChange(".git/index", repo.Times.MtimeIndex) {
+		return true
+	}
+	if repo.didFileChange(".git", repo.Times.MtimeDir) {
+		// todo: do something with CheckDirty()
+		// return true
+	}
+	return false
+}