Add repo merge script

Author: simonswine

merge-repos.sh

@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# create tmp folder
+WORK_DIR=`mktemp -d`
+
+function cleanup {      
+  rm -rf "$WORK_DIR"
+  echo "Deleted temp working directory $WORK_DIR"
+}
+
+trap cleanup EXIT
+
+git clone [email protected]:grafana/pyroscope.git "${WORK_DIR}/og"
+git clone [email protected]:grafana/phlare.git    "${WORK_DIR}/phlare"
+
+
+# rewrite phlare history to maintain correct links
+cd "$WORK_DIR/phlare"
+git filter-repo --message-callback '
+import re
+return re.sub(b"#([0-9]+)", b"https://github.com/grafana/phlare/issues/\\1", message)
+'
+
+# move import path to new repo's
+git ls-files '*.go' go.mod go.sum | xargs sed -i 's#github.com/grafana/phlare#github.com/grafana/pyroscope#g'
+go mod tidy
+git add -A .
+git commit -m "Rename go import path"
+
+# move og into subfolder
+cd "$WORK_DIR/og"
+mkdir -p ../temp
+mv * ../temp
+mv .* ../temp
+mv ../temp/.git .
+mv ../temp og/
+git add -A .
+git commit -m "Move og-pyroscope into subfolder"
+
+# now merge phlare in
+git remote add phlare "${WORK_DIR}/phlare"
+git fetch phlare
+git merge phlare/main --allow-unrelated-histories -m "The new Pyroscope"
+
+git push [email protected]:simonswine/pyroscope HEAD:merged -f