add fetch-gerrit-patch.sh, tweak READMEs
Change-Id: I6df4f3226af9087ef346de72cbcaa86a4d4d5e13
diff --git a/src/fetch-gerrit-patch.sh b/src/fetch-gerrit-patch.sh
new file mode 100755
index 0000000..0353461
--- /dev/null
+++ b/src/fetch-gerrit-patch.sh
@@ -0,0 +1,41 @@
+#!/bin/sh
+# fetch gerrit patch into new branch named like the patch number.
+#
+# Usage: go to a git clone and pass a patch number:
+#
+# cd osmo-msc
+# P 973
+# or
+# P 973/2
+#
+# Will create new local branches '973_4' (if 4 is the latest patch set)
+# or '973_2', respectively.
+
+patch="$1"
+
+if [ -z "$patch" ]; then
+ echo "Usage: $0 1234[/5]"
+ exit 1
+fi
+
+if [ -z "$(echo "$patch" | grep '/')" ]; then
+ patch="/$patch/"
+fi
+
+if [ -z "$(echo "$patch" | grep '^/')" ]; then
+ patch="/$patch"
+fi
+
+last_set="$(git ls-remote origin "changes/*" | grep "$patch" | sed 's#.*/\([^/]*\)$#\1 &#' | sort -n | tail -n 1)"
+if [ -z "$last_set" ]; then
+ echo "Not found: $patch"
+ exit 1
+fi
+
+change_name="$(echo "$last_set" | sed 's/.*\(refs.*\)/\1/')"
+branch_name="$(echo "$change_name" | sed 's#refs/changes/../\([0-9]*\)/\([0-9]*\)#\1_\2#')"
+
+set -x
+git fetch origin "$change_name"
+git checkout -b "$branch_name" FETCH_HEAD
+