exec_on_tag.sh: empty tag means current tag

if "" is passed as tag name, then it will be executed on the current tag

1 files changed, 11 insertions, 2 deletions

diff --git a/scripts/exec_on_tag.sh b/scripts/exec_on_tag.sh
index 6fcac162..7510661d 100755
--- a/scripts/exec_on_tag.sh
+++ b/scripts/exec_on_tag.sh
@@ -5,17 +5,26 @@ TAG="$1"
 EXPIRE="120" # expiry time in seconds
 shift
 
-if [ -z "$TAG" ] || [ -z "$1" ] ;then
+if [ -z "$1" ] ;then
     echo "usage: $0 TAG COMMAND [ARGS ...]" >&2
     echo "executes a COMMAND on a specific TAG" >&2
     echo "if TAG doesnot exist, it will be created" >&2
+    echo "if TAG is empty, current tag will be used" >&2
 
 fi
 
-function hc() {
+hc() {
     herbstclient "$@"
 }
 
+curtag() {
+     hc tag_status \
+        | grep -oE "$(echo -ne '\t')#[^$(echo -ne '\t')]*" \
+        | tail -c +3
+}
+
+TAG=${TAG:-$(curtag)}
+
 # ensure tag exists
 hc add "$TAG"