fix(ci): use temporary version in verify.js to avoid publish collision [EXT-7068]

Author: jjolton-contentful

scripts/verify.js

@@ -1,25 +1,48 @@
 const spawn = require('cross-spawn')
+const fs = require('fs')
 const {
   isCanary,
   getVersion,
   restorePackageJson,
   setPackageName,
   PACKAGES,
   MODULE_MAIN_PATH,
+  PACKAGE_JSON_PATH,
   getTag,
 } = require('./shared')
 
+/**
+ * Generate a unique version for dry-run verification.
+ * 
+ * This is needed because `npm publish --dry-run` will fail if the current
+ * version already exists on npm. Since this script runs during semantic-release's
+ * `verifyConditions` step (BEFORE the next version is determined), we need to
+ * use a temporary version that definitely doesn't exist on npm.
+ */
+function setDryRunVersion() {
+  const packageJson = JSON.parse(fs.readFileSync(PACKAGE_JSON_PATH, 'utf8'))
+  const timestamp = Date.now()
+  // Use a version that will never conflict: 0.0.0-verify.{timestamp}
+  packageJson.version = `0.0.0-verify.${timestamp}`
+  fs.writeFileSync(PACKAGE_JSON_PATH, JSON.stringify(packageJson, null, 2))
+  return packageJson.version
+}
+
 try {
   for (const package of PACKAGES) {
     console.log('')
     console.log(`📦 Deploying package: ${package} (dry run)`)
 
-    const version = getVersion()
-    const tag = getTag(isCanary(version))
+    const originalVersion = getVersion()
+    const tag = getTag(isCanary(originalVersion))
 
     console.log(` > 📝 Updating package name...`)
     setPackageName(package)
 
+    // Set a temporary version for dry-run to avoid "version already exists" errors
+    const dryRunVersion = setDryRunVersion()
+    console.log(` > 🔄 Using temporary version ${dryRunVersion} for dry-run verification`)
+
     console.log(` > 📚 Publishing ${package} on the registry... (dry run)`)
     const { status } = spawn.sync(
       'npm',