Automatically calculate version based on commits

Author: codebytere

components/git/release.js

@@ -35,15 +35,10 @@ function builder(yargs) {
 }
 
 function handler(argv) {
-  if (argv.newVersion) {
-    const newVersion = semver.clean(argv.newVersion);
-    if (semver.valid(newVersion)) {
-      if (argv.prepare) {
-        return release(PREPARE, argv);
-      } else if (argv.promote) {
-        return release(PROMOTE, argv);
-      }
-    }
+  if (argv.prepare) {
+    return release(PREPARE, argv);
+  } else if (argv.promote) {
+    return release(PROMOTE, argv);
   }
 
   // If more than one action is provided or no valid action
@@ -78,24 +73,39 @@ async function main(state, argv, cli, dir) {
 
     if (prep.warnForWrongBranch()) return;
 
+    // If the new version was automatically calculated, confirm it.
+    if (!argv.newVersion) {
+      const create = await cli.prompt(
+        `Create release with new version ${prep.newVersion}?`,
+        { defaultAnswer: true });
+
+      if (!create) {
+        cli.error('Aborting release preparation process');
+        return;
+      }
+    }
+
     // Check the branch diff to determine if the releaser
     // wants to backport any more commits before proceeding.
     cli.startSpinner('Fetching branch-diff');
     const raw = prep.getBranchDiff({ onlyNotableChanges: false });
     const diff = raw.split('*');
     cli.stopSpinner('Got branch diff');
 
-    const staging = `v${semver.major(argv.newVersion)}.x-staging`;
-    const proceed = await cli.prompt(
-      `There are ${diff.length - 1} commits that may be ` +
-      `backported to ${staging} - do you still want to proceed?`,
-      { defaultAnswer: false });
-
-    if (!proceed) {
-      const seeDiff = await cli.prompt(
-        'Do you want to see the branch diff?');
-      if (seeDiff) cli.log(raw);
-      return;
+    const outstandingCommits = diff.length - 1;
+    if (outstandingCommits !== 0) {
+      const staging = `v${semver.major(prep.newVersion)}.x-staging`;
+      const proceed = await cli.prompt(
+        `There are ${outstandingCommits} commits that may be ` +
+        `backported to ${staging} - do you still want to proceed?`,
+        { defaultAnswer: false });
+
+      if (!proceed) {
+        const seeDiff = await cli.prompt(
+          'Do you want to see the branch diff?');
+        if (seeDiff) cli.log(raw);
+        return;
+      }
     }
 
     return prep.prepare();

lib/prepare_release.js

@@ -15,13 +15,24 @@ class ReleasePreparation {
   constructor(argv, cli, dir) {
     this.cli = cli;
     this.dir = dir;
-    this.newVersion = semver.clean(argv.newVersion);
     this.isSecurityRelease = argv.security;
     this.isLTS = false;
     this.ltsCodename = '';
     this.date = '';
     this.config = getMergedConfig(this.dir);
 
+    // Allow passing optional new version.
+    if (argv.newVersion) {
+      const newVersion = semver.clean(argv.newVersion);
+      if (!semver.valid(newVersion)) {
+        cli.warn(`${newVersion} is not a valid semantic version.`);
+        return;
+      }
+      this.newVersion = newVersion;
+    } else {
+      this.newVersion = this.calculateNewVersion();
+    }
+
     const { upstream, owner, repo, newVersion } = this;
 
     this.versionComponents = {
@@ -54,17 +65,20 @@ class ReleasePreparation {
     await this.updateNodeVersion();
     cli.stopSpinner(`Updated 'src/node_version.h' for ${newVersion}`);
 
-    // Check whether to update NODE_MODULE_VERSION (default false).
-    const shouldUpdateNodeModuleVersion = await cli.prompt(
-      'Update NODE_MODULE_VERSION?', { defaultAnswer: false });
-    if (shouldUpdateNodeModuleVersion) {
-      const variant = await cli.prompt(
-        'Specify variant (ex. \'v8_7.9\') for new NODE_MODULE_VERSION:',
-        { questionType: 'input', noSeparator: true });
-      const versions = await cli.prompt(
-        'Specify versions (ex. \'14.0.0-pre\') for new NODE_MODULE_VERSION:',
-        { questionType: 'input', noSeparator: true });
-      this.updateNodeModuleVersion('node', variant, versions);
+    // Check whether to update NODE_MODULE_VERSION.
+    const isSemverMajor = versionComponents.minor === 0;
+    if (isSemverMajor) {
+      const shouldUpdateNodeModuleVersion = await cli.prompt(
+        'Update NODE_MODULE_VERSION?', { defaultAnswer: false });
+      if (shouldUpdateNodeModuleVersion) {
+        const variant = await cli.prompt(
+          'Specify variant (ex. \'v8_7.9\') for new NODE_MODULE_VERSION:',
+          { questionType: 'input', noSeparator: true });
+        const versions = await cli.prompt(
+          'Specify versions (ex. \'14.0.0-pre\') for new NODE_MODULE_VERSION:',
+          { questionType: 'input', noSeparator: true });
+        this.updateNodeModuleVersion('node', variant, versions);
+      }
     }
 
     // Update any REPLACEME tags in the docs.
@@ -154,6 +168,32 @@ class ReleasePreparation {
     return this.config.username;
   }
 
+  calculateNewVersion() {
+    let newVersion;
+
+    const lastTagVersion = semver.clean(this.getLastRef());
+    const lastTag = {
+      major: semver.major(lastTagVersion),
+      minor: semver.minor(lastTagVersion),
+      patch: semver.patch(lastTagVersion)
+    };
+
+    const raw = this.getBranchDiff({
+      onlyNotableChanges: false,
+      comparisonBranch: `v${lastTagVersion}`
+    });
+
+    if (raw.includes('SEMVER-MAJOR')) {
+      newVersion = `${lastTag.major + 1}.0.0`;
+    } else if (raw.includes('SEMVER-MINOR')) {
+      newVersion = `${lastTag.major}.${lastTag.minor + 1}.0`;
+    } else {
+      newVersion = `${lastTag.major}.${lastTag.minor}.${lastTag.patch + 1}`;
+    }
+
+    return newVersion;
+  }
+
   getCurrentBranch() {
     return runSync('git', ['rev-parse', '--abbrev-ref', 'HEAD']).trim();
   }
@@ -253,14 +293,21 @@ class ReleasePreparation {
                           ` ${releaseInfo}, @${username}\n`;
 
     for (let idx = 0; idx < arr.length; idx++) {
-      if (arr[idx].includes(`<a id="${lastRef.substring(1)}"></a>`)) {
+      const topHeader =
+        `<a href="#${lastRef.substring(1)}">${lastRef.substring(1)}</a><br/>`;
+      if (arr[idx].includes(topHeader)) {
+        const newHeader =
+          `<a href="#${newVersion}">${newVersion}</a><br/>`;
+        arr.splice(idx, 1, newHeader);
+      } else if (arr[idx].includes(`<a id="${lastRef.substring(1)}"></a>`)) {
         const toAppend = [];
         toAppend.push(`<a id="${newVersion}"></a>`);
         toAppend.push(releaseHeader);
         toAppend.push('### Notable Changes\n');
         toAppend.push(notableChanges);
         toAppend.push('### Commits\n');
         toAppend.push(allCommits);
+        toAppend.push('');
 
         arr.splice(idx, 0, ...toAppend);
         break;
@@ -345,23 +392,33 @@ class ReleasePreparation {
 
     cli.log(`${messageTitle}\n\n${messageBody.join('')}`);
     const useMessage = await cli.prompt(
-      'Continue with this commit message?');
+      'Continue with this commit message?', { defaultAnswer: false });
     return useMessage;
   }
 
   getBranchDiff(opts) {
     const {
-      versionComponents,
-      stagingBranch,
+      versionComponents = {},
       upstream,
       newVersion,
       isLTS
     } = this;
 
+    let majorVersion;
+    let stagingBranch;
+    if (Object.keys(versionComponents).length !== 0) {
+      majorVersion = versionComponents.major;
+      stagingBranch = this.stagingBranch;
+    } else {
+      stagingBranch = this.getCurrentBranch();
+      const stagingBranchSemver = semver.coerce(stagingBranch);
+      majorVersion = stagingBranchSemver.major;
+    }
+
     let branchDiffOptions;
     if (opts.onlyNotableChanges) {
       const proposalBranch = `v${newVersion}-proposal`;
-      const releaseBranch = `v${versionComponents.major}.x`;
+      const releaseBranch = `v${majorVersion}.x`;
 
       const notableLabels = [
         'notable-change',
@@ -377,21 +434,26 @@ class ReleasePreparation {
     } else {
       const excludeLabels = [
         'semver-major',
-        `dont-land-on-v${versionComponents.major}.x`,
-        `backport-requested-v${versionComponents.major}.x`,
-        `backported-to-v${versionComponents.major}.x`,
-        `backport-blocked-v${versionComponents.major}.x`
+        `dont-land-on-v${majorVersion}.x`,
+        `backport-requested-v${majorVersion}.x`,
+        `backported-to-v${majorVersion}.x`,
+        `backport-blocked-v${majorVersion}.x`
       ];
 
       const isSemverMinor = versionComponents.patch === 0;
       if (isLTS && !isSemverMinor) {
         excludeLabels.push('semver-minor');
       }
 
+      let comparisonBranch = 'master';
+      if (opts.comparisonBranch) {
+        comparisonBranch = opts.comparisonBranch;
+      }
+
       branchDiffOptions = [
         stagingBranch,
         // TODO(codebytere): use Current branch instead of master for LTS
-        'master',
+        comparisonBranch,
         `--exclude-label=${excludeLabels.join(',')}`,
         '--filter-release',
         '--format=simple'