[COGITO PATCH]Re: Origin handling

["Santi Béjar" <sbejar@gmail.com>]

I propose that the origin of a branch comes from a file in
.git/branches/ of the same name. So the origin of default branch
master is the content of the file .git/branches/master that in
the current practice would be "origin". But we could have the
remote branch "git", being the origin of the local branch
"git_dirs" (the content of .git/branches/git_dirs = "git").

The origin branch is reserved. When you cg-clone the origin is now
called cloned (but "commit-id cloned" = "commit-id origin" while you do
not switch to another branch whith other origin). The transition from
old handling is not in the patch.

So now you can:

cg-clone -s rsync://rsync.kernel.org/pub/scm/git/git.git/

and work in this in your "master" branch with origin "cloned".

You can add another repository:

cg-branch-add pb http://pasky.or.cz/~pasky/dev/git/git-pb.git
cg-pull pb

and if you want to do some modifications based on pb:

cg-branch-add pb-sb pb
ln -s refs/heads/pb-sb .git/HEAD
commit-id pb > .git/HEAD
git-read-tree HEAD
git-checkout-cache -f -q -u -a

and work on your branch.

The last four lines are the work of the hipothetical cg-branch-switch.



Signed-off-by: "Santi Béjar" <sbejar@gmail.com>

---

 cg-Xnormid    |    6 ++++++
 cg-branch-add |    2 +-
 cg-clone      |    2 +-
 cg-commit     |    7 ++++++-
 cg-init       |    9 +++++----
 cg-merge      |    7 ++++++-
 cg-pull       |    7 ++++++-
 7 files changed, 31 insertions(+), 9 deletions(-)

diff --git a/cg-Xnormid b/cg-Xnormid
--- a/cg-Xnormid
+++ b/cg-Xnormid
@@ -6,6 +6,7 @@
 #
 # Strings resolve in this order:
 # 	NULL, this, HEAD  => .git/HEAD
+# 	origin => origin of the branch
 # 	<tags>
 # 	<heads>
 # 	short SHA1 (4 or more hex digits)
@@ -19,6 +20,11 @@ id="$1"
 if [ ! "$id" ] || [ "$id" = "this" ] || [ "$id" = "HEAD" ]; then
 	read id < "$_git/HEAD"
 
+elif [ "$id" = "origin" ]; then
+	branch=$(readlink $_git/HEAD | sed 's@refs/heads/@@')
+	origin=$(cat $_git/branches/$branch)
+	read id < "$_git/refs/heads/$origin"
+
 elif [ -r "$_git/refs/tags/$id" ]; then
 	read id < "$_git/refs/tags/$id"
 
diff --git a/cg-branch-add b/cg-branch-add
--- a/cg-branch-add
+++ b/cg-branch-add
@@ -40,7 +40,7 @@ location=$2
 ([ "$name" ] && [ "$location" ]) || usage
 (echo $name | egrep -qv '[^a-zA-Z0-9_.@!:-]') || \
 	die "name contains invalid characters"
-if [ "$name" = "this" ] || [ "$name" = "HEAD" ]; then
+if [ "$name" = "this" ] || [ "$name" = "HEAD" ] || [ "$name" = "origin" ]; then
 	die "given branch name is reserved"
 fi
 
diff --git a/cg-clone b/cg-clone
--- a/cg-clone
+++ b/cg-clone
@@ -56,4 +56,4 @@ fi
 trap "rm -rf $dir" SIGTERM EXIT
 cg-init $location || exit $?
 trap "" SIGTERM EXIT
-echo "Cloned to $dir/ (origin $location available as branch \"origin\")"
+echo "Cloned to $dir/ (origin $location available as branch \"cloned\")"
diff --git a/cg-commit b/cg-commit
--- a/cg-commit
+++ b/cg-commit
@@ -141,7 +141,12 @@ if [ "$merging" ]; then
 	[ "$msgs" ] && echo -n 'Merge with '
 	[ -s $_git/merging-sym ] || cp $_git/merging $_git/merging-sym
 	for sym in $(cat $_git/merging-sym); do
-		uri=$(cat $_git/branches/$sym)
+		if [ $sym = origin ] ; then
+			branch=$(readlink $_git/HEAD | sed 's@refs/heads/@@')
+			uri=$(cat $_git/branches/$branch)
+		else
+			uri=$(cat $_git/branches/$sym)
+		fi
 		[ "$uri" ] || uri="$sym"
 		echo "$uri" >>$LOGMSG
 		[ "$msgs" ] && echo "$uri"
diff --git a/cg-init b/cg-init
--- a/cg-init
+++ b/cg-init
@@ -26,15 +26,16 @@ mkdir $_git/branches
 touch $_git/refs/heads/master
 
 if [ "$uri" ]; then
-	echo "$uri" >$_git/branches/origin
-	cg-pull origin || die "pull failed"
+	echo "$uri" >$_git/branches/cloned
+	echo cloned >$_git/branches/master
+	cg-pull cloned || die "pull failed"
 
-	cp $_git/refs/heads/origin $_git/refs/heads/master
+	cp $_git/refs/heads/cloned $_git/refs/heads/master
 	git-read-tree HEAD
 	git-checkout-cache -a
 	git-update-cache --refresh
 
-	echo "Cloned (origin $uri available as branch \"origin\")"
+	echo "Cloned (cloned $uri available as branch \"cloned\")"
 else
 	git-read-tree # Seed the dircache
 	find * \( -type f -o -type l \) -print0 | xargs -0r cg-add
diff --git a/cg-pull b/cg-pull
--- a/cg-pull
+++ b/cg-pull
@@ -14,10 +14,15 @@ USAGE="cg-pull [BRANCH_NAME]"
 name=$1
 
 
-[ "$name" ] || { [ -s $_git/refs/heads/origin ] && name=origin; }
+if [ -z "$name" ]; then
+	branch=$(readlink $_git/HEAD | sed 's@refs/heads/@@')
+	name=$(cat $_git/branches/$branch 2>/dev/null)
+fi
 [ "$name" ] || die "where to pull from?"
 uri=$(cat "$_git/branches/$name" 2>/dev/null) || die "unknown branch: $name"
 
+[ -e "$_git/branches/$uri" ] && die "local branches cannot pull"
+
 rembranch=master
 if echo "$uri" | grep -q '#'; then
 	rembranch=$(echo $uri | cut -d '#' -f 2)