config

commit 1c95e1fc2b9b8011c98a5370ad716fa030a0cdef
parent b131e501e0f6ecb2914b3f82227f8ff88d6c0855
Author: Jacob R. Edwards <n/a>
Date:   Wed, 28 Dec 2022 16:42:12 -0800

Improve error reporting in buf script

Show what caused usage to be displayed on an invalid command and
show usage when no command is given.

Diffstat:
M
local/bin/bin/buf
 | 
20
++++++++++++++------

1 file changed, 14 insertions(+), 6 deletions(-)
diff --git a/local/bin/bin/buf b/local/bin/bin/buf
@@ -86,8 +86,21 @@ default() cat "$config"/default
 
 summerize() awk 'NR>1{printf " [...]"; exit}{printf "%s", $0}END{printf "\n"}'
 
+usage() {
+	echo "${1:+"error: $1
+"}"'usage: buf list [regex]
+       buf show [regex]
+       buf get [buf]
+       buf set [buf]
+       buf swap buf1 [buf2]' 1>&2
+	exit 1
+}
+
 set -eu
 
+test $# -eq 0 &&
+	usage 'No command'
+
 mkdir -p "$bufs"
 com="$1"
 shift
@@ -107,10 +120,5 @@ case "$#$com" in
 ([12]swap)
 	swap "$1" "${2:-"$(default)"}" ;;
 (*)
-	echo 'usage: buf list [regex]
-       buf show [regex]
-       buf get [buf]
-       buf set [buf]
-       buf swap buf1 [buf2]' 1>&2
-	exit 1
+	usage "$com: Command not found"
 esac