Add script for rebasing ledger actions (#354)

Author: blueridger

package.json

@@ -7,6 +7,7 @@
   "license": "MIT",
   "private": true,
   "dependencies": {
+    "lodash.isequal": "^4.5.0",
     "sourcecred": "^0.9.3"
   },
   "scripts": {
@@ -16,7 +17,8 @@
     "start": "dotenv -- sourcecred go --no-load && sourcecred serve",
     "serve": "sourcecred serve",
     "grain": "sourcecred grain",
-    "go": "sourcecred go"
+    "go": "sourcecred go",
+    "rebase": "bash ./scripts/rebase-ledger/index.sh"
   },
   "devDependencies": {
     "dotenv-cli": "^4.0.0",

scripts/rebase-ledger/index.js

@@ -0,0 +1,6 @@
+const { rebase } = require("./rebase-ledger.js");
+const fs = require("fs");
+
+const [base, target] = process.argv.slice(2);
+const { ledger1, ledger2, ledgerResult } = rebase(base, target);
+console.log(ledgerResult.serialize());

scripts/rebase-ledger/index.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+exit() {
+    exit_code=$?
+    if [ $exit_code -ne 0 ]; then
+        mv ./data/ledger-backup.json ./data/ledger.json
+        rm ./data/ledger-result.json
+    else
+        mv ./data/ledger-result.json ./data/ledger.json
+        rm ./data/ledger-backup.json
+    fi
+    
+}
+
+set -e
+trap exit EXIT
+
+cp ./data/ledger.json ./data/ledger-backup.json
+
+git fetch
+
+git reset --hard origin/main
+
+node ./scripts/rebase-ledger/rebase-test.js
+echo "Safety test passed. Proceeding with rebase."
+
+node ./scripts/rebase-ledger/index.js \
+    "./data/ledger.json" \
+    "./data/ledger-backup.json" \
+    > ./data/ledger-result.json \
+    /
+
+echo "Rebase complete. Commit and push changes."