smarter and faster mtime logic

1 files changed, 97 insertions, 0 deletions

diff --git a/changed.go b/changed.go
new file mode 100644
index 0000000..d9d4bad
--- /dev/null
+++ b/changed.go
@@ -0,0 +1,97 @@
+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
+	}
+	pbtime := repo.Times.MtimeDir
+	mtime := timestamppb.New(*fileTime)
+	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) 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
+	}
+	pbtime := repo.Times.MtimeHead
+	mtime := timestamppb.New(*fileTime)
+	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
+	}
+	pbtime := repo.Times.MtimeIndex
+	mtime := timestamppb.New(*fileTime)
+	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) RepoChanged() 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
+}