build: Add GitHub scripts for rebasing PRs (#18359)

PR Close #18359

scripts/github/utils/json_extract.js

@@ -0,0 +1,54 @@
+#!/usr/bin/env node
+
+var json = '';
+
+if (require.main === module) {
+  process.stdin.setEncoding('utf8');
+
+  process.stdin.on('readable', () => {
+    const chunk = process.stdin.read();
+    if (chunk !== null) {
+      json += chunk;
+    }
+  });
+
+  process.stdin.on('end', () => {
+    var obj = JSON.parse(json);
+    var argv = process.argv.slice(2);
+    extractPaths(obj, argv).forEach(function(line) {
+      console.log(line);
+    })
+  });
+}
+
+function extractPaths(obj, paths) {
+  var lines = [];
+  paths.forEach(function(exp) {
+    var objs = obj instanceof Array ? [].concat(obj) : [obj];
+    exp.split('.').forEach(function(name) {
+      for(var i = 0; i < objs.length; i++) {
+        var o = objs[i];
+        if (o instanceof Array) {
+          // Expand and do over
+          objs = objs.slice(0, i).concat(o).concat(objs.slice(i+1, objs.length));
+          i--;
+        } else {
+          name.split("=").forEach(function(name, index) {
+            if (index == 0) {
+              objs[i] = o = o[name];
+            } else if (name.charAt(0) == '^') {
+              if (o.indexOf(name.substr(1)) !== 0) {
+                objs.splice(i, 1);
+                i--;
+              }
+            }
+          });
+        }
+      }
+    });
+    lines.push(objs.join("|"));
+  });
+  return lines;
+}
+
+exports.extractPaths = extractPaths;