From fba3d635ea60ea8b1bbc8d85cec79d94b9f9d404 Mon Sep 17 00:00:00 2001
From: bel <bel>
Date: Sat, 17 May 2025 20:57:41 -0600
Subject: [PATCH] if optimistically assuming cksum unchanged, then do not get
 cksum, just update checked, modified

---
 src/asses/db.go  |  9 +++++++++
 src/asses/one.go | 14 ++++++++++----
 2 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/src/asses/db.go b/src/asses/db.go
index 5a70b51..f3a2907 100644
--- a/src/asses/db.go
+++ b/src/asses/db.go
@@ -56,6 +56,15 @@ func checked(ctx context.Context, p, cksum string, modified time.Time) error {
 		return err
 	}
 
+	if cksum != "" {
+	} else if err := db.Exec(ctx, `
+		UPDATE "asses.checks"
+		SET checked_at=$2, modified=$3
+		WHERE p=$1
+	`, p, time.Now(), modified); err == nil {
+		return nil
+	}
+
 	return db.Exec(ctx, `
 		INSERT INTO "asses.checks"
 		(p, checked_at, cksum, modified)
diff --git a/src/asses/one.go b/src/asses/one.go
index 4e2aa3a..7584bdc 100644
--- a/src/asses/one.go
+++ b/src/asses/one.go
@@ -48,9 +48,11 @@ func One(ctx context.Context, p string) error {
 		log.Printf("asses.One(%s) // modified (%v) is now %v", shortp, last.Modified, stat.ModTime())
    }
 
+   doCksum := true
 	if err := func() error {
 		if len(last.Cksum) > 0 {
          if last.Modified.IsZero() {
+            doCksum = false
 				log.Printf("asses.One(%s) // assume cksum unchanged given null modified ", shortp)
 				return nil
          }
@@ -76,10 +78,14 @@ func One(ctx context.Context, p string) error {
 		return err
 	}
 
-	cksum, err := Cksum(ctx, p)
-	if err != nil {
-		return err
-	}
+   var cksum string
+   if doCksum {
+      var err error
+	   cksum, err = Cksum(ctx, p)
+	   if err != nil {
+	   	return err
+	   }
+   }
 	stat, err := os.Stat(p)
 	if err != nil {
 		return err