create-pull-request: read remote from env var CPR_CONTRIB_REMOTE

So that we don't have specify "-u <contrib>" everytime, and
CPR_CONTRIB_REMOTE can be overrided by -u.

[YOCTO #9409]

(From OE-Core rev: 81c58fd33e725ce7dba693763646f4c30747bbd5)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/create-pull-request

@@ -47,7 +47,7 @@ Usage: $CMD [-h] [-o output_dir] [-m msg_body_file] [-s subject] [-r relative_to
   -p prefix           Use [prefix N/M] instead of [PATCH N/M] as the subject prefix
   -r relative_to      Starting commit (default: master)
   -s subject          The subject to be inserted into the summary email
-  -u remote           The git remote where the branch is located
+  -u remote           The git remote where the branch is located, or set CPR_CONTRIB_REMOTE in env
   -d relative_dir     Generate patches relative to directory
 
  Examples:
@@ -60,6 +60,7 @@ Usage: $CMD [-h] [-o output_dir] [-m msg_body_file] [-s subject] [-r relative_to
 EOM
 }
 
+REMOTE="$CPR_CONTRIB_REMOTE"
 # Parse and validate arguments
 while getopts "b:acd:hi:m:o:p:r:s:u:l:" OPT; do
 	case $OPT in
@@ -103,31 +104,6 @@ while getopts "b:acd:hi:m:o:p:r:s:u:l:" OPT; do
 		;;
 	u)
 		REMOTE="$OPTARG"
-		REMOTE_URL=$(git config remote.$REMOTE.url)
-		if [ $? -ne 0 ]; then
-			echo "ERROR: git config failed to find a url for '$REMOTE'"
-			echo
-			echo "To add a remote url for $REMOTE, use:"
-			echo "  git config remote.$REMOTE.url <url>"
-			exit 1
-		fi
-
-		# Rewrite private URLs to public URLs
-		# Determine the repository name for use in the WEB_URL later
-		case "$REMOTE_URL" in
-		*@*)
-			USER_RE="[A-Za-z0-9_.@][A-Za-z0-9_.@-]*\$\?"
-			PROTO_RE="[a-z][a-z+]*://"
-			GIT_RE="\(^\($PROTO_RE\)\?$USER_RE@\)\([^:/]*\)[:/]\(.*\)"
-			REMOTE_URL=${REMOTE_URL%.git}
-			REMOTE_REPO=$(echo $REMOTE_URL | sed "s#$GIT_RE#\4#")
-			REMOTE_URL=$(echo $REMOTE_URL | sed "s#$GIT_RE#git://\3/\4#")
-			;;
-		*)
-			echo "WARNING: Unrecognized remote URL: $REMOTE_URL"
-			echo "         The pull and browse URLs will likely be incorrect"
-			;;
-		esac
 		;;
 	a)
 		CPR_CONTRIB_AUTO_PUSH="1"
@@ -135,6 +111,38 @@ while getopts "b:acd:hi:m:o:p:r:s:u:l:" OPT; do
 	esac
 done
 
+if [ -z "$REMOTE" ]; then
+	echo "ERROR: Missing parameter -u or CPR_CONTRIB_REMOTE in env, no git remote!"
+	usage
+	exit 1
+fi
+
+REMOTE_URL=$(git config remote.$REMOTE.url)
+if [ $? -ne 0 ]; then
+	echo "ERROR: git config failed to find a url for '$REMOTE'"
+	echo
+	echo "To add a remote url for $REMOTE, use:"
+	echo "  git config remote.$REMOTE.url <url>"
+	exit 1
+fi
+
+# Rewrite private URLs to public URLs
+# Determine the repository name for use in the WEB_URL later
+case "$REMOTE_URL" in
+*@*)
+	USER_RE="[A-Za-z0-9_.@][A-Za-z0-9_.@-]*\$\?"
+	PROTO_RE="[a-z][a-z+]*://"
+	GIT_RE="\(^\($PROTO_RE\)\?$USER_RE@\)\([^:/]*\)[:/]\(.*\)"
+	REMOTE_URL=${REMOTE_URL%.git}
+	REMOTE_REPO=$(echo $REMOTE_URL | sed "s#$GIT_RE#\4#")
+	REMOTE_URL=$(echo $REMOTE_URL | sed "s#$GIT_RE#git://\3/\4#")
+	;;
+*)
+	echo "WARNING: Unrecognized remote URL: $REMOTE_URL"
+	echo "         The pull and browse URLs will likely be incorrect"
+	;;
+esac
+
 if [ -z "$BRANCH" ]; then
 	BRANCH=$(git branch | grep -e "^\* " | cut -d' ' -f2)
 	echo "NOTE: Assuming remote branch '$BRANCH', use -b to override."
@@ -145,12 +153,6 @@ if [ -z "$L_BRANCH" ]; then
 	echo "NOTE: Assuming local branch HEAD, use -l to override."
 fi
 
-if [ -z "$REMOTE_URL" ]; then
-	echo "ERROR: Missing parameter -u, no git remote!"
-	usage
-	exit 1
-fi
-
 if [ $RFC -eq 1 ]; then
 	PREFIX="RFC $PREFIX"
 fi