Add script to rebase libsyncthing against latest Syncthing release

libsyncthing/update.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+set -e
+shopt -s nocasematch
+shopt -s nullglob
+
+libsyncthingdir=$(dirname "$0")
+syncthingrepodir=$libsyncthingdir/go/src/github.com/syncthing/syncthing
+special_release_regex='rc|beta|debian'
+latest_tag=
+
+echo '==> Updating Syncthing repo'
+git -C "$syncthingrepodir" remote update
+
+echo '==> Getting latest tag/release'
+for tag in $(git -C "$syncthingrepodir" tag -l --sort=-version:refname 'v*'); do
+    if [[ $tag =~ $special_release_regex ]]; then
+        continue
+    fi
+    if [[ $tag ]]; then
+        latest_tag=$tag
+        break
+    fi
+done
+if [[ -z $latest_tag ]]; then
+    echo 'Unable to find latest release tag'
+    exit -1
+fi
+echo "Latest Syncthing release: $latest_tag"
+
+echo '==> Updating CMakeLists.txt'
+sed -i -e "s|^\(set(META_SYNCTHING_VERSION \"\(.*\)\")\).*$|set(META_SYNCTHING_VERSION \"$latest_tag\")|" "$libsyncthingdir/CMakeLists.txt"
+
+echo '==> Rebasing libsyncthing'
+if git -C "$syncthingrepodir" rev-parse --verify "libsyncthing-$latest_tag" > /dev/null; then
+    echo "Nothing to do: A libsyncthing branch \"libsyncthing-$latest_tag\" for the latest release already exists."
+    exit 0
+fi
+git -C "$syncthingrepodir" checkout libsyncthing-latest
+git -C "$syncthingrepodir" rebase "$latest_tag"
+git -C "$syncthingrepodir" branch "libsyncthing-$latest_tag"
+
+echo '==> Pushing updated/new libsyncthing branches to GitHub'
+git -C "$syncthingrepodir" push -fu martchus libsyncthing-latest:libsyncthing-latest
+git -C "$syncthingrepodir" push -u martchus "libsyncthing-$latest_tag:libsyncthing-$latest_tag"