fix(launch): track instantiated commit

packages/blueprints/blueprint/src/blueprint.ts

@@ -23,6 +23,7 @@ export interface Options extends ParentOptions {}
 
 export class Blueprint extends Project {
   public readonly context: Context;
+  private readonly OPTIONS_FILE = 'options.json';
   protected strategies: StrategyLocations | undefined;
   /**
    * Set information used on the pull request generated by resynthesis
@@ -39,8 +40,6 @@ export class Blueprint extends Project {
       name: 'CodeCatalystBlueprint',
       ...options,
     });
-
-    const OPTIONS_FILE = 'options.json';
     const rootDir = path.resolve(this.outdir);
     this.context = {
       rootDir,
@@ -59,7 +58,7 @@ export class Blueprint extends Project {
       project: {
         name: process.env.CONTEXT_PROJECTNAME,
         bundlepath: process.env.EXISTING_BUNDLE_ABS,
-        options: getOptions(path.join(process.env.EXISTING_BUNDLE_ABS || '', OPTIONS_FILE)),
+        options: getOptions(path.join(process.env.EXISTING_BUNDLE_ABS || '', this.OPTIONS_FILE)),
         blueprint: {
           instantiationId: process.env.CUR_INSTANTIATION_ID,
           instantiations: structureExistingBlueprints(process.env.INSTANTIATIONS_ABS),
@@ -87,7 +86,7 @@ export class Blueprint extends Project {
     }
 
     // write the options to the bundle
-    const optionsRecordPath = path.join(this.outdir, OPTIONS_FILE);
+    const optionsRecordPath = path.join(this.outdir, this.OPTIONS_FILE);
     fs.mkdirSync(path.dirname(optionsRecordPath), { recursive: true });
     fs.writeFileSync(optionsRecordPath, JSON.stringify(options, null, 2));
 
@@ -120,6 +119,26 @@ export class Blueprint extends Project {
     fs.writeFileSync(instantiationRecordPath, JSON.stringify(configurableOptions, null, 2));
   }
 
+  /**
+   * Writes the provided `options` to the generated `options.json` file
+   * under `authorDefined` key.
+   * @param options
+   */
+  augmentOptions(options: { [key: string]: any }) {
+    const optionsRecordPath = path.join(this.outdir, this.OPTIONS_FILE);
+    fs.writeFileSync(
+      optionsRecordPath,
+      JSON.stringify(
+        {
+          ...getOptions(optionsRecordPath),
+          authorDefined: options,
+        },
+        null,
+        2,
+      ),
+    );
+  }
+
   getResynthStrategies(bundlepath: string): Strategy[] {
     return (this.strategies || {})[bundlepath] || [];
   }

packages/blueprints/launch-blueprint/src/blueprint.ts

@@ -117,12 +117,42 @@ export class Blueprint extends ParentBlueprint {
         timeout: GIT_CLONE_TIMEOUT,
       });
 
-      // remove .git - we have no use for it and the large number of objects
-      // contained within it could slow down the copying of sources to our workspace
-      fs.rmSync(path.join(pathToRepository, '.git'), { recursive: true, force: true });
+      if (this.context.resynthesisPhase === 'PROPOSED') {
+        const revParse = cp.spawnSync('git', ['rev-parse', 'HEAD'], {
+          cwd: pathToRepository,
+        });
+
+        this.augmentOptions({ commit: revParse.stdout.toString('utf-8').trim() });
+      }
+    }
+
+    const currentInstantiation = this.context.project?.blueprint?.instantiationId
+      ? this.context.project.blueprint.instantiations?.find(i => i.id === this.context.project.blueprint.instantiationId)
+      : undefined;
+    const commitHash = currentInstantiation?.options?.authorDefined?.commit;
+    if (this.context.resynthesisPhase === 'ANCESTOR' && commitHash) {
+      // need to refetch since we previously just cloned at --depth=1
+      cp.spawnSync('git', ['fetch', '--depth', '1', 'origin', commitHash], {
+        cwd: pathToRepository,
+        stdio: [0, 1, 1],
+        timeout: GIT_CLONE_TIMEOUT,
+      });
+      cp.spawnSync('git', ['checkout', commitHash], {
+        cwd: pathToRepository,
+        stdio: [0, 1, 1],
+      });
+    } else if (commitHash) {
+      // ensure repo is checked out at HEAD if phase is not ancestor
+      const branch = this.state.options.sourceBranch ?? 'HEAD';
+      cp.spawnSync('git', ['checkout', `refs/remotes/origin/${branch}`], {
+        cwd: pathToRepository,
+        stdio: [0, 1, 1],
+      });
     }
 
-    fs.cpSync(pathToRepository, this.state.repository.path, { recursive: true });
+    // exclude .git - we have no use for it and the large number of objects
+    // contained within it could slow down the copying of sources to our workspace
+    fs.cpSync(pathToRepository, this.state.repository.path, { recursive: true, filter: src => src.indexOf('.git/') === -1 });
 
     //map options and environments to workflows
     const workflowPath = path.join(this.state.repository.path, '.codecatalyst', 'workflows');