Simplify post-checkout

1 files changed, 4 insertions, 15 deletions

diff --git a/Biz/Ide/post-checkout b/Biz/Ide/post-checkout
index 5474b5a..636fad6 100755
--- a/Biz/Ide/post-checkout
+++ b/Biz/Ide/post-checkout
@@ -1,28 +1,17 @@
 #!/usr/bin/env bash
 set -eu
-
-# Path to wherever you put this.
 init_tags=$BIZ_ROOT/Biz/Ide/init_tags.sh
 
 old=$1
 new=$2
-# is_branch=$2 # 1 if branch, 2 if file
 
-# filter out only the changed files
-changed=($(git diff --name-only $old $new))
+# filter out only the changed haskell files
+changed=($(git diff --diff-filter=d --name-only $old $new -- '*.hs'))
 
 if [[ ! -r tags ]]
 then
     $init_tags
-elif [[ ${#changed} -gt 0 ]]
+elif [[ ${#changed:-0} -gt 0 ]]
 then
-    grep -v -F --regexp=${^changed} $BIZ_ROOT/tags > $BIZ_ROOT/tags.tmp
-    mv tags.tmp tags
-
-    # Retag all hs files except the ones that were deleted.
-    modified=($(git diff --name-only --diff-filter=d $old $new))
-    # Filter *.hs, since grep returns non-zero for no matches.
-    modified=(${(M)modified:#*.hs})
-    echo "modified: $modified"
-    $init_tags $modified
+    $init_tags $changed
 fi