early common things for branch handling

shell.go

@@ -149,3 +149,47 @@ func (repo *Repo) RunStrictAll(all [][]string) (*cmd.Status, error) {
 	}
 	return nil, nil
 }
+
+func (repo *Repo) RunVerbose(cmd []string) (*cmd.Status, error) {
+	log.Info("Running:", repo.GetGoPath(), cmd)
+	r, err := repo.RunStrictNew(cmd)
+	if err != nil {
+		log.Info("Error", cmd, err)
+	}
+	for _, line := range r.Stdout {
+		log.Info(line)
+	}
+	for _, line := range r.Stderr {
+		log.Info(line)
+	}
+	return r, err
+}
+
+func (repo *Repo) RunVerboseOnError(cmd []string) (*cmd.Status, error) {
+	r, err := repo.RunStrictNew(cmd)
+	if err == nil {
+		return r, err
+	}
+	log.Info("Run Error:", repo.GetGoPath(), cmd, err)
+	for _, line := range r.Stdout {
+		log.Info(line)
+	}
+	for _, line := range r.Stderr {
+		log.Info(line)
+	}
+	return r, err
+}
+
+// only safe to run len() on STDOUT
+// DO NOT TRY TO PARSE THIS EXCEPT HASH AS FIRST VALUE
+// Intended to be human readable
+func (repo *Repo) ConstructGitDiffLog(branch1, branch2 string) []string {
+	var cmd []string
+	cmd = append(cmd, "git")
+	cmd = append(cmd, "log")
+	cmd = append(cmd, "--format=\"%H %ae %as %s\"")
+	cmd = append(cmd, branch1)
+	cmd = append(cmd, "--not")
+	cmd = append(cmd, branch2)
+	return cmd
+}