From: Dmitry V. Levin <ldv@altlinux.org>
Date: Mon, 15 Jul 2019 12:04:48 +0000 (+0000)
Subject: copyright-year-gen, file-date-gen: enhance error diagnostics
X-Git-Tag: v5.3~123
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0f2d6384b8f8375cc5807da94150295c0283d10d;p=strace

copyright-year-gen, file-date-gen: enhance error diagnostics

* copyright-year-gen: Prefix error message with the script name.
* file-date-gen: Likewise.  Bail out in case of invalid date.
---

diff --git a/copyright-year-gen b/copyright-year-gen
index 8b3317e8..3c74a186 100755
--- a/copyright-year-gen
+++ b/copyright-year-gen
@@ -32,7 +32,7 @@ year=
 	year="$(date -u +%Y)"
 
 [ -n "${year}" ] || {
-	echo >&2 'Undefined year.'
+	printf >&2 "%s: Undefined year.\n" "$0"
 	exit 1
 }
 
diff --git a/file-date-gen b/file-date-gen
index 8e352945..b128ee54 100755
--- a/file-date-gen
+++ b/file-date-gen
@@ -40,8 +40,14 @@ date=
 	date="$(date -u)"
 
 [ -n "${date}" ] || {
-	echo >&2 'Undefined date.'
+	printf >&2 "%s: Undefined date.\n" "$0"
 	exit 1
 }
 
-exec printf "%s" $(date -u "+${DATE_FORMAT}" -d "${date}")
+datestr="$(date -u "+${DATE_FORMAT}" -d "${date}")" &&
+[ -n "${datestr}" ] || {
+	printf >&2 "%s: Invalid date: %s\n" "$0" "$date"
+	exit 1
+}
+
+exec printf '%s' "$datestr"