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[PATCH] bash: use for-each-ref format 'refname:short'

From
SZEDER Gábor <szeder@ira.uka.de>
Date
Sep 19, 2008, 22:15 UTC
Message-ID
<1221862525-20574-1-git-send-email-szeder@ira.uka.de>

Using this format simplifies the code for completing refs and (in some cases) improves performance significantly.

For repositories like the current git.git (with more than 200 refs) there is no real performance difference, but for a repository with 2000 refs the total time needed to complete the refs is reduced by ~25% (from around 400ms to around 305ms).

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
---
 OK, so after the refname:short patch hit master, here is the updated
 patch to use it in bash completion.  The patch itself is the same as
 the original one, except, of course, the for-each-ref format name.  I
 have also adjusted the performance numbers in the commit message.
 contrib/completion/git-completion.bash |   26 ++++++--------------------
 1 files changed, 6 insertions(+), 20 deletions(-)
diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index d3fb6ae..fccb499 100755
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -154,11 +154,8 @@ __git_heads ()
 {
 	local cmd i is_hash=y dir="$(__gitdir "$1")"
 	if [ -d "$dir" ]; then
-		for i in $(git --git-dir="$dir" \
-			for-each-ref --format='%(refname)' \
-			refs/heads ); do
-			echo "${i#refs/heads/}"
-		done
+		git --git-dir="$dir" for-each-ref --format='%(refname:short)' \
+			refs/heads
 		return
 	fi
 	for i in $(git ls-remote "$1" 2>/dev/null); do
@@ -175,11 +172,8 @@ __git_tags ()
 {
 	local cmd i is_hash=y dir="$(__gitdir "$1")"
 	if [ -d "$dir" ]; then
-		for i in $(git --git-dir="$dir" \
-			for-each-ref --format='%(refname)' \
-			refs/tags ); do
-			echo "${i#refs/tags/}"
-		done
+		git --git-dir="$dir" for-each-ref --format='%(refname:short)' \
+			refs/tags
 		return
 	fi
 	for i in $(git ls-remote "$1" 2>/dev/null); do
@@ -197,16 +191,8 @@ __git_refs ()
 	local cmd i is_hash=y dir="$(__gitdir "$1")"
 	if [ -d "$dir" ]; then
 		if [ -e "$dir/HEAD" ]; then echo HEAD; fi
-		for i in $(git --git-dir="$dir" \
-			for-each-ref --format='%(refname)' \
-			refs/tags refs/heads refs/remotes); do
-			case "$i" in
-				refs/tags/*)    echo "${i#refs/tags/}" ;;
-				refs/heads/*)   echo "${i#refs/heads/}" ;;
-				refs/remotes/*) echo "${i#refs/remotes/}" ;;
-				*)              echo "$i" ;;
-			esac
-		done
+		git --git-dir="$dir" for-each-ref --format='%(refname:short)' \
+			refs/tags refs/heads refs/remotes
 		return
 	fi
 	for i in $(git ls-remote "$dir" 2>/dev/null); do
-- 
1.6.0.2.294.g50836f
Next: Shawn O. Pearce
Message 1 of 2 in “bash: use for-each-ref format 'refname:short'”
  1. bash: use for-each-ref format 'refname:short'SZEDER Gábor, Sep 19, 2008
  2. Shawn O. PearceSep 19, 2008

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