chore: Create apply patches script (#36793)

Author: tyhopp

scripts/apply-patches.js

@@ -0,0 +1,28 @@
+/**
+ * Apply patches in order. Extracted from logic in release-next-major.js.
+ */
+
+const path = require(`path`)
+const { execSync } = require(`child_process`)
+const glob = require(`glob`)
+
+const gatsbyPKG = require(`../packages/gatsby/package.json`)
+const nextMajor = String(Number(gatsbyPKG.version.match(/[^.]+/)[0]) + 1)
+
+const patchFiles = glob.sync(`patches/v${nextMajor}/*.patch`, {
+  cwd: path.join(__dirname, `..`),
+})
+
+for (const patchFile of patchFiles) {
+  console.log(`Applying patch ${patchFile}`)
+  try {
+    execSync(`git apply ${patchFile}`, {
+      cwd: path.join(__dirname, `..`),
+      stdio: `pipe`,
+    })
+  } catch (err) {
+    console.log(err.stderr.toString())
+    // eslint-disable-next-line
+    throw ``
+  }
+}