use parent commit details in create commit

dist/index.js

@@ -1325,20 +1325,21 @@ class GitHubHelper {
         return __awaiter(this, void 0, void 0, function* () {
             let headCommit = {
                 sha: baseCommit.sha,
+                tree: baseCommit.tree,
                 verified: false
             };
             for (const commit of branchCommits) {
-                headCommit = yield this.createCommit(commit, [headCommit.sha], repoPath, branchRepository);
+                headCommit = yield this.createCommit(commit, headCommit, repoPath, branchRepository);
             }
             yield this.createOrUpdateRef(branchRepository, branch, headCommit.sha);
             return headCommit;
         });
     }
-    createCommit(commit, parents, repoPath, branchRepository) {
+    createCommit(commit, parentCommit, repoPath, branchRepository) {
         return __awaiter(this, void 0, void 0, function* () {
             const repository = this.parseRepository(branchRepository);
-            // In the case of an empty commit, the tree is the same as the parent
+            // In the case of an empty commit, the tree references the parent's tree
-            let treeSha = commit.tree;
+            let treeSha = parentCommit.tree;
             if (commit.changes.length > 0) {
                 core.info(`Creating tree objects for local commit ${commit.sha}`);
                 const treeObjects = yield Promise.all(commit.changes.map((_a) => __awaiter(this, [_a], void 0, function* ({ path, mode, status }) {
@@ -1362,15 +1363,16 @@ class GitHubHelper {
                     };
                 })));
                 core.info(`Creating tree for local commit ${commit.sha}`);
-                const { data: tree } = yield this.octokit.rest.git.createTree(Object.assign(Object.assign({}, repository), { base_tree: parents[0], tree: treeObjects }));
+                const { data: tree } = yield this.octokit.rest.git.createTree(Object.assign(Object.assign({}, repository), { base_tree: parentCommit.sha, tree: treeObjects }));
                 treeSha = tree.sha;
                 core.info(`Created tree ${treeSha} for local commit ${commit.sha}`);
             }
-            const { data: remoteCommit } = yield this.octokit.rest.git.createCommit(Object.assign(Object.assign({}, repository), { parents: parents, tree: treeSha, message: `${commit.subject}\n\n${commit.body}` }));
+            const { data: remoteCommit } = yield this.octokit.rest.git.createCommit(Object.assign(Object.assign({}, repository), { parents: [parentCommit.sha], tree: treeSha, message: `${commit.subject}\n\n${commit.body}` }));
             core.info(`Created commit ${remoteCommit.sha} for local commit ${commit.sha}`);
             core.info(`Commit verified: ${remoteCommit.verification.verified}; reason: ${remoteCommit.verification.reason}`);
             return {
                 sha: remoteCommit.sha,
+                tree: remoteCommit.tree.sha,
                 verified: remoteCommit.verification.verified
             };
         });
@@ -1381,6 +1383,7 @@ class GitHubHelper {
             const { data: remoteCommit } = yield this.octokit.rest.git.getCommit(Object.assign(Object.assign({}, repository), { commit_sha: sha }));
             return {
                 sha: remoteCommit.sha,
+                tree: remoteCommit.tree.sha,
                 verified: remoteCommit.verification.verified
             };
         });

src/github-helper.ts

@@ -27,6 +27,7 @@ interface Pull {
 
 interface CommitResponse {
   sha: string
+  tree: string
   verified: boolean
 }
 
@@ -227,12 +228,13 @@ export class GitHubHelper {
   ): Promise<CommitResponse> {
     let headCommit: CommitResponse = {
       sha: baseCommit.sha,
+      tree: baseCommit.tree,
       verified: false
     }
     for (const commit of branchCommits) {
       headCommit = await this.createCommit(
         commit,
-        [headCommit.sha],
+        headCommit,
         repoPath,
         branchRepository
       )
@@ -243,13 +245,13 @@ export class GitHubHelper {
 
   private async createCommit(
     commit: Commit,
-    parents: string[],
+    parentCommit: CommitResponse,
     repoPath: string,
     branchRepository: string
   ): Promise<CommitResponse> {
     const repository = this.parseRepository(branchRepository)
-    // In the case of an empty commit, the tree is the same as the parent
+    // In the case of an empty commit, the tree references the parent's tree
-    let treeSha = commit.tree
+    let treeSha = parentCommit.tree
     if (commit.changes.length > 0) {
       core.info(`Creating tree objects for local commit ${commit.sha}`)
       const treeObjects = await Promise.all(
@@ -284,7 +286,7 @@ export class GitHubHelper {
       core.info(`Creating tree for local commit ${commit.sha}`)
       const {data: tree} = await this.octokit.rest.git.createTree({
         ...repository,
-        base_tree: parents[0],
+        base_tree: parentCommit.sha, // but this should probably be tree
         tree: treeObjects
       })
       treeSha = tree.sha
@@ -293,7 +295,7 @@ export class GitHubHelper {
 
     const {data: remoteCommit} = await this.octokit.rest.git.createCommit({
       ...repository,
-      parents: parents,
+      parents: [parentCommit.sha],
       tree: treeSha,
       message: `${commit.subject}\n\n${commit.body}`
     })
@@ -305,6 +307,7 @@ export class GitHubHelper {
     )
     return {
       sha: remoteCommit.sha,
+      tree: remoteCommit.tree.sha,
       verified: remoteCommit.verification.verified
     }
   }
@@ -320,6 +323,7 @@ export class GitHubHelper {
     })
     return {
       sha: remoteCommit.sha,
+      tree: remoteCommit.tree.sha,
       verified: remoteCommit.verification.verified
     }
   }