git-tag: Fix "can't shift that many".

This stop git-tag from emitting a "shift: can't shift that many"
error, when listing tags.

[jc: with further fixups from Sam Vilain merged in; it passes
 the tests under dash now]

Signed-off-by: Alexandre Vassalotti <alexandre@peadrop.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/git-tag.sh b/git-tag.sh
index 3917cd829842462ca4e3d196246c637d8c3a58dc..1ff5b41e7f8671ccf7e2c6b25cedcfd1fbc2ea55 100755 (executable)
--- a/git-tag.sh
+++ b/git-tag.sh
@@ -19,28 +19,40 @@ do
     case "$1" in
     -a)
        annotate=1
+       shift
        ;;
     -s)
        annotate=1
        signed=1
+       shift
        ;;
     -f)
        force=1
+       shift
        ;;
     -n)
-        case $2 in
-       -*)     LINES=1         # no argument
+        case "$#,$2" in
+       1,* | *,-*)
+               LINES=1         # no argument
                ;;
        *)      shift
                LINES=$(expr "$1" : '\([0-9]*\)')
                [ -z "$LINES" ] && LINES=1 # 1 line is default when -n is used
                ;;
        esac
+       shift
        ;;
     -l)
        list=1
        shift
-       PATTERN="$1"    # select tags by shell pattern, not re
+       case $# in
+       0)      PATTERN=
+               ;;
+       *)
+               PATTERN="$1"    # select tags by shell pattern, not re
+               shift
+               ;;
+       esac
        git rev-parse --symbolic --tags | sort |
            while read TAG
            do
@@ -74,7 +86,9 @@ do
        if test "$#" = "0"; then
            die "error: option -m needs an argument"
        else
+           message="$1"
            message_given=1
+           shift
        fi
        ;;
     -F)
@@ -85,13 +99,19 @@ do
        else
            message="$(cat "$1")"
            message_given=1
+           shift
        fi
        ;;
     -u)
        annotate=1
        signed=1
        shift
-       username="$1"
+       if test "$#" = "0"; then
+           die "error: option -u needs an argument"
+       else
+           username="$1"
+           shift
+       fi
        ;;
     -d)
        shift
@@ -126,7 +146,6 @@ do
        break
        ;;
     esac
-    shift
 done
 
 [ -n "$list" ] && exit 0