[PATCH 04/18] dim: autodetect remotes, first part for dim_setup

[Daniel Vetter]

The goals here are multiple:
- simpler configuration through autodetection
- allows seamless upgrading to git worktree for the aux checkouts
- eventually I want to split up drm-misc into a separate remote ...

And yes this is just a start.

v2: Print errors to stderr, otherwise they can't be seen when directly
assigning the result of get_remote_name to a variable.

Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
 dim | 112 +++++++++++++++++++++++++++++++++++---------------------------------
 1 file changed, 58 insertions(+), 54 deletions(-)

diff --git a/dim b/dim
index 2601bb7dbbad..90eb553c6575 100755
--- a/dim
+++ b/dim
@@ -192,6 +192,24 @@ if [[ "$((`date +%s` % 100))" -eq "0" ]] ; then
         dim_uptodate
 fi
 
+function get_remote_name
+{
+	local remote_url=$1
+
+	local remote=`git remote -v | grep $remote_url | \
+		head -n1 | sed -e 's/^\(.*\)\t.*/\1/'`
+
+	if [[ $remote == "" ]] ; then
+		echoerr No git remote for $remote_url found in `pwd`.
+		echoerr Please set it up using
+		echoerr     $ git remote add '<name>' $remote_url
+		echoerr with a name of your choice.
+		exit 1
+	fi
+
+	echo $remote
+}
+
 # get message id from file
 # $1 = file
 message_get_id ()
@@ -1044,8 +1062,36 @@ function dim_update_branches
 	update_rerere_cache
 }
 
+function setup_aux_checkout # name remote
+{
+	local name=$1
+	local remote_url=$2
+	local dir=$3
+	local remote
+
+	echo "Setting up $dir ..."
+
+	if [ ! -d $dir ]; then
+		git clone --reference=$DIM_PREFIX/$DIM_DRM_INTEL/.git $remote_url $dir
+		cd $dir
+		git config remote.origin.url $remote_url
+		echo "$DIM_PREFIX/$DIM_DRM_INTEL/.git/objects" > .git/objects/info/alternates
+		git repack -a -d -l
+		remote=origin
+	else
+		cd $dir
+		remote=`get_remote_name $drm_intel_ssh`
+	fi
+	if ! git branch | grep $name > /dev/null ; then
+		git checkout -t $remote/$name
+	fi
+	cd ..
+}
+
 function dim_setup
 {
+	local remote
+
 	if [ ! -d $DIM_PREFIX ]; then
 		echo "please set up your repository directory with:"
 		echo "    mkdir -p $DIM_PREFIX"
@@ -1062,76 +1108,34 @@ function dim_setup
 		exit 1
 	fi
 	cd $DIM_DRM_INTEL
-	if ! git remote -v | grep "^origin[[:space:]]" | grep $linux_upstream_git > /dev/null; then
-		echo "please set up remote origin for $linux_upstream_git"
-		exit 1
-	fi
-	if ! git remote -v | grep "^$DIM_DRM_INTEL_REMOTE[[:space:]]" | grep $drm_intel_ssh > /dev/null; then
-		echo "please set up remote $DIM_DRM_INTEL_REMOTE for $drm_intel_ssh with:"
-		echo "    git remote add $DIM_DRM_INTEL_REMOTE $drm_intel_ssh"
-		echo "or update your configuration."
-		exit 1
-	fi
-	if ! git remote -v | grep "^$DIM_DRM_UPSTREAM_REMOTE[[:space:]]" | grep $drm_upstream_git > /dev/null; then
-		echo "please set up remote $DIM_DRM_UPSTREAM_REMOTE for $drm_upstream_git with:"
-		echo "    git remote add $DIM_DRM_UPSTREAM_REMOTE $drm_upstream_git"
-		echo "or update your configuration."
-		exit 1
-	fi
-	cd ..
 
-	echo "Setting up maintainer-tools ..."
-	if [ ! -d maintainer-tools ]; then
-		git clone --reference=$DIM_PREFIX/$DIM_DRM_INTEL/.git $drm_intel_ssh maintainer-tools
-	fi
-	cd maintainer-tools
-	git config remote.origin.url $drm_intel_ssh
-	echo "$DIM_PREFIX/$DIM_DRM_INTEL/.git/objects" > .git/objects/info/alternates
-	git repack -a -d -l
-	if ! git branch | grep maintainer-tools > /dev/null ; then
-		git checkout -t origin/maintainer-tools
-	fi
-	cd ..
+	# check remote configuration
+	remote=`get_remote_name $linux_upstream_git`
+	remote=`get_remote_name $drm_intel_ssh`
+	remote=`get_remote_name $drm_upstream_git`
 
-	echo "Setting up drm-intel-rerere ..."
-	if [ ! -d drm-intel-rerere ]; then
-		git clone --reference=$DIM_PREFIX/$DIM_DRM_INTEL/.git $drm_intel_ssh drm-intel-rerere
-	fi
-	cd drm-intel-rerere
-	git config remote.origin.url $drm_intel_ssh
-	echo "$DIM_PREFIX/$DIM_DRM_INTEL/.git/objects" > .git/objects/info/alternates
-	git repack -a -d -l
-	if ! git branch | grep rerere-cache > /dev/null ; then
-		git checkout -t origin/rerere-cache
-	fi
 	cd ..
 
-	echo "Setting up drm-intel-nightly ..."
-	if [ ! -d drm-intel-nightly ]; then
-		git clone --reference=$DIM_PREFIX/$DIM_DRM_INTEL/.git $drm_intel_ssh drm-intel-nightly
-	fi
+	setup_aux_checkout maintainer-tools $drm_intel_ssh maintainer-tools
+
+	setup_aux_checkout rerere-cache $drm_intel_ssh drm-intel-rerere
+
+	setup_aux_checkout drm-intel-nightly $drm_intel_ssh drm-intel-nightly
 	cd drm-intel-nightly
-	mkdir -p .git/rr-cache
-	git config remote.origin.url $drm_intel_ssh
-	echo "$DIM_PREFIX/$DIM_DRM_INTEL/.git/objects" > .git/objects/info/alternates
-	git repack -a -d -l
-	if ! git branch | grep drm-intel-nightly > /dev/null ; then
-		git checkout -t origin/drm-intel-nightly
-	fi
 	if git remote | grep drm-upstream > /dev/null ; then
 		git config remote.drm-upstream.url $drm_upstream_git
 	else
-		git remote add drm-upstream $drm_upstream_git
+		remote=`get_remote_name $drm_upstream_git`
 	fi
 	if git remote | grep sound-upstream > /dev/null ; then
 		git config remote.sound-upstream.url $sound_upstream_git
 	else
-		git remote add sound-upstream $sound_upstream_git
+		remote=`get_remote_name $sound_upstream_git`
 	fi
 	if git remote | grep driver-core-upstream > /dev/null ; then
 		git config remote.driver-core-upstream.url $driver_core_upstream_git
 	else
-		git remote add driver-core-upstream $driver_core_upstream_git
+		remote=`get_remote_name $driver_core_upstream_git`
 	fi
 
 	echo "dim setup successfully completed!"
-- 
2.9.3