Initial plan

2026-05-22 15:16:52 +00:00 · 2026-03-13 21:33:07 +00:00
12 changed files with 11 additions and 798 deletions
@@ -1103,7 +1103,6 @@ async function setup(testName: string): Promise<void> {
    ),
    tryDisableAutomaticGarbageCollection: jest.fn(),
    tryGetFetchUrl: jest.fn(),
-    tryGetObjectFormat: jest.fn(async () => ({format: '', succeeded: true})),
    tryGetConfigValues: jest.fn(
      async (
        key: string,
@@ -378,169 +378,6 @@ describe('Test fetchDepth and fetchTags options', () => {
  })
 })

-describe('repository object format', () => {
-  beforeEach(async () => {
-    jest.spyOn(fshelper, 'fileExistsSync').mockImplementation(jest.fn())
-    jest.spyOn(fshelper, 'directoryExistsSync').mockImplementation(jest.fn())
-  })
-
-  afterEach(() => {
-    jest.restoreAllMocks()
-  })
-
-  it('detects SHA-256 from a 64-character HEAD oid', async () => {
-    mockExec.mockImplementation((path, args, options) => {
-      if (args.includes('version')) {
-        options.listeners.stdout(Buffer.from('git version 2.50.1'))
-      }
-
-      if (args.includes('ls-remote')) {
-        options.listeners.stdout(
-          Buffer.from(
-            'ref: refs/heads/main\tHEAD\n' +
-              '9422233ca7ee1b17f1e905d0e141faf0c401556c41cdc6acd71c6bd685da2e92\tHEAD\n'
-          )
-        )
-      }
-
-      return 0
-    })
-    jest.spyOn(exec, 'exec').mockImplementation(mockExec)
-
-    git = await commandManager.createCommandManager('test', false, false)
-
-    const objectFormat = await git.tryGetObjectFormat(
-      'https://github.com/example/repo'
-    )
-
-    expect(objectFormat).toEqual({format: 'sha256', succeeded: true})
-    expect(mockExec).toHaveBeenCalledWith(
-      expect.any(String),
-      [
-        '-c',
-        'protocol.version=2',
-        'ls-remote',
-        '--quiet',
-        '--exit-code',
-        '--symref',
-        'https://github.com/example/repo',
-        'HEAD'
-      ],
-      expect.objectContaining({
-        ignoreReturnCode: true,
-        silent: true
-      })
-    )
-  })
-
-  it('detects SHA-1 from a 40-character HEAD oid', async () => {
-    mockExec.mockImplementation((path, args, options) => {
-      if (args.includes('version')) {
-        options.listeners.stdout(Buffer.from('git version 2.50.1'))
-      }
-
-      if (args.includes('ls-remote')) {
-        options.listeners.stdout(
-          Buffer.from(
-            'ref: refs/heads/main\tHEAD\n' +
-              'c988866043f035e6a46509872215f91d879044c9\tHEAD\n'
-          )
-        )
-      }
-
-      return 0
-    })
-    jest.spyOn(exec, 'exec').mockImplementation(mockExec)
-
-    git = await commandManager.createCommandManager('test', false, false)
-
-    await expect(
-      git.tryGetObjectFormat('https://github.com/example/repo')
-    ).resolves.toEqual({format: 'sha1', succeeded: true})
-  })
-
-  it('returns unsuccessful when HEAD does not resolve to a recognized object id', async () => {
-    mockExec.mockImplementation((path, args, options) => {
-      if (args.includes('version')) {
-        options.listeners.stdout(Buffer.from('git version 2.50.1'))
-      }
-
-      if (args.includes('ls-remote')) {
-        options.listeners.stdout(Buffer.from('ref: refs/heads/main\tHEAD\n'))
-      }
-
-      return 0
-    })
-    jest.spyOn(exec, 'exec').mockImplementation(mockExec)
-
-    git = await commandManager.createCommandManager('test', false, false)
-
-    await expect(
-      git.tryGetObjectFormat('https://github.com/example/repo')
-    ).resolves.toEqual({format: '', succeeded: false})
-  })
-
-  it('returns unsuccessful when object format detection cannot reach the remote', async () => {
-    mockExec.mockImplementation((path, args, options) => {
-      if (args.includes('version')) {
-        options.listeners.stdout(Buffer.from('git version 2.50.1'))
-        return 0
-      }
-
-      return 128
-    })
-    jest.spyOn(exec, 'exec').mockImplementation(mockExec)
-
-    git = await commandManager.createCommandManager('test', false, false)
-
-    await expect(
-      git.tryGetObjectFormat('https://github.com/example/repo')
-    ).resolves.toEqual({format: '', succeeded: false})
-  })
-
-  it('initializes SHA-256 repositories with the matching object format', async () => {
-    mockExec.mockImplementation((path, args, options) => {
-      if (args.includes('version')) {
-        options.listeners.stdout(Buffer.from('git version 2.50.1'))
-      }
-
-      return 0
-    })
-    jest.spyOn(exec, 'exec').mockImplementation(mockExec)
-
-    git = await commandManager.createCommandManager('test', false, false)
-
-    await git.init('sha256')
-
-    expect(mockExec).toHaveBeenCalledWith(
-      expect.any(String),
-      ['init', '--object-format=sha256', 'test'],
-      expect.any(Object)
-    )
-  })
-
-  it('initializes SHA-1 repositories with existing default arguments', async () => {
-    mockExec.mockImplementation((path, args, options) => {
-      if (args.includes('version')) {
-        options.listeners.stdout(Buffer.from('git version 2.50.1'))
-      }
-
-      return 0
-    })
-    jest.spyOn(exec, 'exec').mockImplementation(mockExec)
-
-    git = await commandManager.createCommandManager('test', false, false)
-
-    await git.init('sha1')
-
-    expect(mockExec).toHaveBeenCalledWith(
-      expect.any(String),
-      ['init', 'test'],
-      expect.any(Object)
-    )
-  })
-})
-
 describe('git user-agent with orchestration ID', () => {
  beforeEach(async () => {
    jest.spyOn(fshelper, 'fileExistsSync').mockImplementation(jest.fn())
@@ -501,7 +501,6 @@ async function setup(testName: string): Promise<void> {
      await fs.promises.stat(path.join(repositoryPath, '.git'))
      return repositoryUrl
    }),
-    tryGetObjectFormat: jest.fn(async () => ({format: '', succeeded: true})),
    tryGetConfigValues: jest.fn(),
    tryGetConfigKeys: jest.fn(),
    tryReset: jest.fn(async () => {
@@ -1,164 +0,0 @@
-import * as core from '@actions/core'
-import * as github from '@actions/github'
-import * as githubApiHelper from '../lib/github-api-helper'
-
-describe('github-api-helper object format', () => {
-  let getOctokitSpy: jest.SpyInstance
-  let debugSpy: jest.SpyInstance
-  let repoGet: jest.Mock
-  let branchGet: jest.Mock
-
-  function mockObjectFormatApi(defaultBranch: string, commitSha: string): void {
-    repoGet = jest.fn(async () => ({
-      data: {
-        default_branch: defaultBranch
-      }
-    }))
-    branchGet = jest.fn(async () => ({
-      data: {
-        commit: {
-          sha: commitSha
-        }
-      }
-    }))
-    getOctokitSpy = jest.spyOn(github, 'getOctokit').mockReturnValue({
-      rest: {
-        repos: {
-          get: repoGet,
-          getBranch: branchGet
-        }
-      }
-    } as any)
-  }
-
-  beforeEach(() => {
-    debugSpy = jest.spyOn(core, 'debug').mockImplementation(jest.fn())
-  })
-
-  afterEach(() => {
-    jest.restoreAllMocks()
-  })
-
-  it('detects SHA-256 from the default branch commit SHA', async () => {
-    const commitSha =
-      '9422233ca7ee1b17f1e905d0e141faf0c401556c41cdc6acd71c6bd685da2e92'
-    mockObjectFormatApi('main', commitSha)
-
-    await expect(
-      githubApiHelper.tryGetRepositoryObjectFormat('token', 'owner', 'repo')
-    ).resolves.toEqual({
-      defaultBranch: 'main',
-      format: 'sha256',
-      succeeded: true
-    })
-
-    expect(getOctokitSpy).toHaveBeenCalledWith(
-      'token',
-      expect.objectContaining({baseUrl: 'https://api.github.com'})
-    )
-    expect(repoGet).toHaveBeenCalledWith({owner: 'owner', repo: 'repo'})
-    expect(branchGet).toHaveBeenCalledWith({
-      owner: 'owner',
-      repo: 'repo',
-      branch: 'main'
-    })
-  })
-
-  it('detects SHA-1 from the default branch commit SHA', async () => {
-    mockObjectFormatApi('main', 'c988866043f035e6a46509872215f91d879044c9')
-
-    await expect(
-      githubApiHelper.tryGetRepositoryObjectFormat('token', 'owner', 'repo')
-    ).resolves.toEqual({defaultBranch: 'main', format: 'sha1', succeeded: true})
-  })
-
-  it('detects object format from an existing commit without API calls', async () => {
-    const commitSha =
-      '9422233ca7ee1b17f1e905d0e141faf0c401556c41cdc6acd71c6bd685da2e92'
-    getOctokitSpy = jest.spyOn(github, 'getOctokit')
-
-    await expect(
-      githubApiHelper.tryGetRepositoryObjectFormat(
-        'token',
-        'owner',
-        'repo',
-        undefined,
-        undefined,
-        commitSha
-      )
-    ).resolves.toEqual({format: 'sha256', succeeded: true})
-
-    expect(getOctokitSpy).not.toHaveBeenCalled()
-  })
-
-  it('uses a branch ref directly without looking up the default branch', async () => {
-    const commitSha = 'c988866043f035e6a46509872215f91d879044c9'
-    repoGet = jest.fn()
-    branchGet = jest.fn(async () => ({
-      data: {
-        commit: {
-          sha: commitSha
-        }
-      }
-    }))
-    getOctokitSpy = jest.spyOn(github, 'getOctokit').mockReturnValue({
-      rest: {
-        repos: {
-          get: repoGet,
-          getBranch: branchGet
-        }
-      }
-    } as any)
-
-    await expect(
-      githubApiHelper.tryGetRepositoryObjectFormat(
-        'token',
-        'owner',
-        'repo',
-        undefined,
-        'refs/heads/feature'
-      )
-    ).resolves.toEqual({format: 'sha1', succeeded: true})
-
-    expect(repoGet).not.toHaveBeenCalled()
-    expect(branchGet).toHaveBeenCalledWith({
-      owner: 'owner',
-      repo: 'repo',
-      branch: 'feature'
-    })
-  })
-
-  it('returns unsuccessful when the default branch commit SHA is not recognized', async () => {
-    mockObjectFormatApi('main', 'not-a-sha')
-
-    await expect(
-      githubApiHelper.tryGetRepositoryObjectFormat('token', 'owner', 'repo')
-    ).resolves.toEqual({format: '', succeeded: false})
-    expect(debugSpy).toHaveBeenCalledWith(
-      'Unable to determine repository object format from commit SHA'
-    )
-  })
-
-  it('returns unsuccessful when the repository API lookup fails', async () => {
-    repoGet = jest.fn(async () => {
-      throw new Error('not found')
-    })
-    branchGet = jest.fn()
-    jest.spyOn(github, 'getOctokit').mockReturnValue({
-      rest: {
-        repos: {
-          get: repoGet,
-          getBranch: branchGet
-        }
-      }
-    } as any)
-
-    await expect(
-      githubApiHelper.tryGetRepositoryObjectFormat('token', 'owner', 'repo')
-    ).resolves.toEqual({format: '', succeeded: false})
-    expect(branchGet).not.toHaveBeenCalled()
-    expect(debugSpy).toHaveBeenCalledWith(
-      'Unable to determine repository object format: not found'
-    )
-  })
-})
@@ -133,16 +133,6 @@ describe('input-helper tests', () => {
    expect(settings.commit).toBe('1111111111222222222233333333334444444444')
  })

-  it('sets ref to empty when explicit sha-256', async () => {
-    inputs.ref =
-      '1111111111222222222233333333334444444444555555555566666666667777'
-    const settings: IGitSourceSettings = await inputHelper.getInputs()
-    expect(settings.ref).toBeFalsy()
-    expect(settings.commit).toBe(
-      '1111111111222222222233333333334444444444555555555566666666667777'
-    )
-  })
-
  it('sets sha to empty when explicit ref', async () => {
    inputs.ref = 'refs/heads/some-other-ref'
    const settings: IGitSourceSettings = await inputHelper.getInputs()
@@ -1,12 +1,8 @@
 import * as assert from 'assert'
-import * as core from '@actions/core'
-import * as github from '@actions/github'
 import * as refHelper from '../lib/ref-helper'
 import {IGitCommandManager} from '../lib/git-command-manager'

 const commit = '1234567890123456789012345678901234567890'
-const sha256Commit =
-  '1234567890123456789012345678901234567890123456789012345678901234'
 let git: IGitCommandManager

 describe('ref-helper tests', () => {
@@ -41,12 +37,6 @@ describe('ref-helper tests', () => {
    expect(checkoutInfo.startPoint).toBeFalsy()
  })

-  it('getCheckoutInfo sha-256 only', async () => {
-    const checkoutInfo = await refHelper.getCheckoutInfo(git, '', sha256Commit)
-    expect(checkoutInfo.ref).toBe(sha256Commit)
-    expect(checkoutInfo.startPoint).toBeFalsy()
-  })
-
  it('getCheckoutInfo refs/heads/', async () => {
    const checkoutInfo = await refHelper.getCheckoutInfo(
      git,
@@ -237,142 +227,4 @@ describe('ref-helper tests', () => {
      '+refs/heads/my/branch:refs/remotes/origin/my/branch'
    )
  })
-
-  describe('checkCommitInfo', () => {
-    const repositoryOwner = 'some-owner'
-    const repositoryName = 'some-repo'
-    const ref = 'refs/pull/123/merge'
-    const sha1Head = '1111111111222222222233333333334444444444'
-    const sha1Base = 'aaaaaaaaaabbbbbbbbbbccccccccccdddddddddd'
-    const sha256Head =
-      '1111111111222222222233333333334444444444555555555566666666667777'
-    const sha256Base =
-      'aaaaaaaaaabbbbbbbbbbccccccccccddddddddddeeeeeeeeeeffffffffff0000'
-    let debugSpy: jest.SpyInstance
-    let getOctokitSpy: jest.SpyInstance
-    let repoGetSpy: jest.Mock
-    let originalEventName: string
-    let originalPayload: unknown
-    let originalRef: string
-    let originalSha: string
-
-    function setPullRequestContext(
-      expectedHeadSha: string,
-      expectedBaseSha: string,
-      mergeCommit: string
-    ): void {
-      ;(github.context as any).eventName = 'pull_request'
-      github.context.ref = ref
-      github.context.sha = mergeCommit
-      ;(github.context as any).payload = {
-        action: 'synchronize',
-        after: expectedHeadSha,
-        number: 123,
-        pull_request: {
-          base: {
-            sha: expectedBaseSha
-          }
-        },
-        repository: {
-          private: false
-        }
-      }
-    }
-
-    beforeEach(() => {
-      originalEventName = github.context.eventName
-      originalPayload = github.context.payload
-      originalRef = github.context.ref
-      originalSha = github.context.sha
-
-      jest.spyOn(github.context, 'repo', 'get').mockReturnValue({
-        owner: repositoryOwner,
-        repo: repositoryName
-      })
-      debugSpy = jest.spyOn(core, 'debug').mockImplementation(jest.fn())
-      repoGetSpy = jest.fn(async () => ({}))
-      getOctokitSpy = jest.spyOn(github, 'getOctokit').mockReturnValue({
-        rest: {
-          repos: {
-            get: repoGetSpy
-          }
-        }
-      } as any)
-    })
-
-    afterEach(() => {
-      ;(github.context as any).eventName = originalEventName
-      ;(github.context as any).payload = originalPayload
-      github.context.ref = originalRef
-      github.context.sha = originalSha
-      jest.restoreAllMocks()
-    })
-
-    it('returns early for SHA-1 merge commit', async () => {
-      setPullRequestContext(sha1Head, sha1Base, commit)
-
-      await refHelper.checkCommitInfo(
-        'token',
-        `Merge ${sha1Head} into ${sha1Base}`,
-        repositoryOwner,
-        repositoryName,
-        ref,
-        commit
-      )
-
-      expect(getOctokitSpy).not.toHaveBeenCalled()
-      expect(repoGetSpy).not.toHaveBeenCalled()
-    })
-
-    it('matches SHA-256 merge commit info', async () => {
-      const actualHeadSha =
-        '9999999999888888888877777777776666666666555555555544444444443333'
-      setPullRequestContext(sha256Head, sha256Base, sha256Commit)
-
-      await refHelper.checkCommitInfo(
-        'token',
-        `Merge ${actualHeadSha} into ${sha256Base}`,
-        repositoryOwner,
-        repositoryName,
-        ref,
-        sha256Commit
-      )
-
-      expect(getOctokitSpy).toHaveBeenCalledWith(
-        'token',
-        expect.objectContaining({
-          userAgent: expect.stringContaining(
-            `expected_head_sha=${sha256Head};actual_head_sha=${actualHeadSha}`
-          )
-        })
-      )
-      expect(repoGetSpy).toHaveBeenCalledWith({
-        owner: repositoryOwner,
-        repo: repositoryName
-      })
-      expect(debugSpy).toHaveBeenCalledWith(
-        `Expected head sha ${sha256Head}; actual head sha ${actualHeadSha}`
-      )
-      expect(debugSpy).not.toHaveBeenCalledWith('Unexpected message format')
-    })
-
-    it('does not match 50-char hex as a valid merge', async () => {
-      const invalidHeadSha =
-        '99999999998888888888777777777766666666665555555555'
-      setPullRequestContext(sha1Head, sha1Base, commit)
-
-      await refHelper.checkCommitInfo(
-        'token',
-        `Merge ${invalidHeadSha} into ${sha1Base}`,
-        repositoryOwner,
-        repositoryName,
-        ref,
-        commit
-      )
-
-      expect(getOctokitSpy).not.toHaveBeenCalled()
-      expect(repoGetSpy).not.toHaveBeenCalled()
-      expect(debugSpy).toHaveBeenCalledWith('Unexpected message format')
-    })
-  })
 })
@@ -896,14 +896,9 @@ class GitCommandManager {
    getWorkingDirectory() {
        return this.workingDirectory;
    }
-    init(objectFormat) {
+    init() {
        return __awaiter(this, void 0, void 0, function* () {
-            const args = ['init'];
-            if (objectFormat === 'sha256') {
-                args.push('--object-format=sha256');
-            }
-            args.push(this.workingDirectory);
-            yield this.execGit(args);
+            yield this.execGit(['init', this.workingDirectory]);
        });
    }
    isDetached() {
@@ -1061,45 +1056,6 @@ class GitCommandManager {
            return stdout;
        });
    }
-    tryGetObjectFormat(repositoryUrl) {
-        return __awaiter(this, void 0, void 0, function* () {
-            var _a;
-            try {
-                const output = yield this.execGit([
-                    '-c',
-                    'protocol.version=2',
-                    'ls-remote',
-                    '--quiet',
-                    '--exit-code',
-                    '--symref',
-                    repositoryUrl,
-                    'HEAD'
-                ], true, true);
-                if (output.exitCode !== 0) {
-                    core.debug(`Unable to determine repository object format: git ls-remote exited with ${output.exitCode}`);
-                    return { format: '', succeeded: false };
-                }
-                for (const line of output.stdout.trim().split('\n')) {
-                    const [oid, ref] = line.split('\t');
-                    if (ref !== 'HEAD') {
-                        continue;
-                    }
-                    if (/^[0-9a-fA-F]{64}$/.test(oid)) {
-                        return { format: 'sha256', succeeded: true };
-                    }
-                    if (/^[0-9a-fA-F]{40}$/.test(oid)) {
-                        return { format: 'sha1', succeeded: true };
-                    }
-                }
-                core.debug('Unable to determine repository object format from HEAD');
-                return { format: '', succeeded: false };
-            }
-            catch (err) {
-                core.debug(`Unable to determine repository object format: ${(_a = err === null || err === void 0 ? void 0 : err.message) !== null && _a !== void 0 ? _a : err}`);
-                return { format: '', succeeded: false };
-            }
-        });
-    }
    tryGetConfigValues(configKey, globalConfig, configFile) {
        return __awaiter(this, void 0, void 0, function* () {
            const args = ['config'];
@@ -1528,24 +1484,10 @@ function getSource(settings) {
            }
            // Save state for POST action
            stateHelper.setRepositoryPath(settings.repositoryPath);
-            let defaultBranch = '';
            // Initialize the repository
            if (!fsHelper.directoryExistsSync(path.join(settings.repositoryPath, '.git'))) {
-                core.startGroup('Determining repository object format');
-                let objectFormatResult = yield githubApiHelper.tryGetRepositoryObjectFormat(settings.authToken, settings.repositoryOwner, settings.repositoryName, settings.githubServerUrl, settings.ref, settings.commit);
-                if (!objectFormatResult.succeeded) {
-                    objectFormatResult = yield git.tryGetObjectFormat(repositoryUrl);
-                }
-                const objectFormat = objectFormatResult.succeeded
-                    ? objectFormatResult.format
-                    : '';
-                defaultBranch = objectFormatResult.defaultBranch || '';
-                if (objectFormat === 'sha256') {
-                    core.info('Detected SHA-256 repository object format');
-                }
-                core.endGroup();
                core.startGroup('Initializing the repository');
-                yield git.init(objectFormat);
+                yield git.init();
                yield git.remoteAdd('origin', repositoryUrl);
                core.endGroup();
            }
@@ -1569,10 +1511,6 @@ function getSource(settings) {
                if (settings.sshKey) {
                    settings.ref = yield git.getDefaultBranch(repositoryUrl);
                }
-                else if (defaultBranch) {
-                    core.info(`Default branch '${defaultBranch}'`);
-                    settings.ref = `refs/heads/${defaultBranch}`;
-                }
                else {
                    settings.ref = yield githubApiHelper.getDefaultBranch(settings.authToken, settings.repositoryOwner, settings.repositoryName, settings.githubServerUrl);
                }
@@ -1872,7 +1810,6 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
 Object.defineProperty(exports, "__esModule", ({ value: true }));
 exports.downloadRepository = downloadRepository;
 exports.getDefaultBranch = getDefaultBranch;
-exports.tryGetRepositoryObjectFormat = tryGetRepositoryObjectFormat;
 const assert = __importStar(__nccwpck_require__(9491));
 const core = __importStar(__nccwpck_require__(2186));
 const fs = __importStar(__nccwpck_require__(7147));
@@ -1974,69 +1911,6 @@ function getDefaultBranch(authToken, owner, repo, baseUrl) {
        }));
    });
 }
-function tryGetRepositoryObjectFormat(authToken, owner, repo, baseUrl, ref, commit) {
-    return __awaiter(this, void 0, void 0, function* () {
-        var _a;
-        try {
-            const commitFormat = getObjectFormat(commit);
-            if (commitFormat) {
-                return { format: commitFormat, succeeded: true };
-            }
-            const octokit = github.getOctokit(authToken, {
-                baseUrl: (0, url_helper_1.getServerApiUrl)(baseUrl)
-            });
-            let branchName = getBranchName(ref);
-            let defaultBranch = '';
-            if (!branchName) {
-                const repository = yield octokit.rest.repos.get({ owner, repo });
-                defaultBranch = repository.data.default_branch;
-                assert.ok(defaultBranch, 'default_branch cannot be empty');
-                branchName = defaultBranch;
-            }
-            const branch = yield octokit.rest.repos.getBranch({
-                owner,
-                repo,
-                branch: branchName
-            });
-            const branchFormat = getObjectFormat(branch.data.commit.sha);
-            if (branchFormat) {
-                return {
-                    defaultBranch: defaultBranch || undefined,
-                    format: branchFormat,
-                    succeeded: true
-                };
-            }
-            core.debug('Unable to determine repository object format from commit SHA');
-            return { format: '', succeeded: false };
-        }
-        catch (err) {
-            core.debug(`Unable to determine repository object format: ${(_a = err === null || err === void 0 ? void 0 : err.message) !== null && _a !== void 0 ? _a : err}`);
-            return { format: '', succeeded: false };
-        }
-    });
-}
-function getBranchName(ref) {
-    if (!ref) {
-        return '';
-    }
-    const headsPrefix = 'refs/heads/';
-    if (ref.startsWith(headsPrefix)) {
-        return ref.substring(headsPrefix.length);
-    }
-    if (!ref.startsWith('refs/') && !getObjectFormat(ref)) {
-        return ref;
-    }
-    return '';
-}
-function getObjectFormat(sha) {
-    if (/^[0-9a-fA-F]{64}$/.test(sha || '')) {
-        return 'sha256';
-    }
-    if (/^[0-9a-fA-F]{40}$/.test(sha || '')) {
-        return 'sha1';
-    }
-    return '';
-}
 function downloadArchive(authToken, owner, repo, ref, commit, baseUrl) {
    return __awaiter(this, void 0, void 0, function* () {
        const octokit = github.getOctokit(authToken, {
@@ -2147,7 +2021,7 @@ function getInputs() {
            }
        }
        // SHA?
-        else if (result.ref.match(/^(?:[0-9a-fA-F]{40}|[0-9a-fA-F]{64})$/)) {
+        else if (result.ref.match(/^[0-9a-fA-F]{40}$/)) {
            result.commit = result.ref;
            result.ref = '';
        }
@@ -2570,7 +2444,7 @@ function checkCommitInfo(token, commitInfo, repositoryOwner, repositoryName, ref
                return;
            }
            // Extract details from message
-            const match = commitInfo.match(/Merge ([0-9a-f]{40}|[0-9a-f]{64}) into ([0-9a-f]{40}|[0-9a-f]{64})/);
+            const match = commitInfo.match(/Merge ([0-9a-f]{40}) into ([0-9a-f]{40})/);
            if (!match) {
                core.debug('Unexpected message format');
                return;
@@ -15,11 +15,6 @@ import {GitVersion} from './git-version'
 export const MinimumGitVersion = new GitVersion('2.18')
 export const MinimumGitSparseCheckoutVersion = new GitVersion('2.28')

-export interface GitObjectFormatResult {
-  format: string
-  succeeded: boolean
-}
-
 export interface IGitCommandManager {
  branchDelete(remote: boolean, branch: string): Promise<void>
  branchExists(remote: boolean, pattern: string): Promise<boolean>
@@ -48,7 +43,7 @@ export interface IGitCommandManager {
  getDefaultBranch(repositoryUrl: string): Promise<string>
  getSubmoduleConfigPaths(recursive: boolean): Promise<string[]>
  getWorkingDirectory(): string
-  init(objectFormat?: string): Promise<void>
+  init(): Promise<void>
  isDetached(): Promise<boolean>
  lfsFetch(ref: string): Promise<void>
  lfsInstall(): Promise<void>
@@ -73,7 +68,6 @@ export interface IGitCommandManager {
  ): Promise<boolean>
  tryDisableAutomaticGarbageCollection(): Promise<boolean>
  tryGetFetchUrl(): Promise<string>
-  tryGetObjectFormat(repositoryUrl: string): Promise<GitObjectFormatResult>
  tryGetConfigValues(
    configKey: string,
    globalConfig?: boolean,
@@ -370,14 +364,8 @@ class GitCommandManager {
    return this.workingDirectory
  }

-  async init(objectFormat?: string): Promise<void> {
-    const args = ['init']
-    if (objectFormat === 'sha256') {
-      args.push('--object-format=sha256')
-    }
-    args.push(this.workingDirectory)
-
-    await this.execGit(args)
+  async init(): Promise<void> {
+    await this.execGit(['init', this.workingDirectory])
  }

  async isDetached(): Promise<boolean> {
@@ -548,55 +536,6 @@ class GitCommandManager {
    return stdout
  }

-  async tryGetObjectFormat(
-    repositoryUrl: string
-  ): Promise<GitObjectFormatResult> {
-    try {
-      const output = await this.execGit(
-        [
-          '-c',
-          'protocol.version=2',
-          'ls-remote',
-          '--quiet',
-          '--exit-code',
-          '--symref',
-          repositoryUrl,
-          'HEAD'
-        ],
-        true,
-        true
-      )
-
-      if (output.exitCode !== 0) {
-        core.debug(
-          `Unable to determine repository object format: git ls-remote exited with ${output.exitCode}`
-        )
-        return {format: '', succeeded: false}
-      }
-
-      for (const line of output.stdout.trim().split('\n')) {
-        const [oid, ref] = line.split('\t')
-        if (ref !== 'HEAD') {
-          continue
-        }
-        if (/^[0-9a-fA-F]{64}$/.test(oid)) {
-          return {format: 'sha256', succeeded: true}
-        }
-        if (/^[0-9a-fA-F]{40}$/.test(oid)) {
-          return {format: 'sha1', succeeded: true}
-        }
-      }
-
-      core.debug('Unable to determine repository object format from HEAD')
-      return {format: '', succeeded: false}
-    } catch (err) {
-      core.debug(
-        `Unable to determine repository object format: ${(err as any)?.message ?? err}`
-      )
-      return {format: '', succeeded: false}
-    }
-  }
-
  async tryGetConfigValues(
    configKey: string,
    globalConfig?: boolean,
@@ -105,36 +105,12 @@ export async function getSource(settings: IGitSourceSettings): Promise<void> {
    // Save state for POST action
    stateHelper.setRepositoryPath(settings.repositoryPath)

-    let defaultBranch = ''
-
    // Initialize the repository
    if (
      !fsHelper.directoryExistsSync(path.join(settings.repositoryPath, '.git'))
    ) {
-      core.startGroup('Determining repository object format')
-      let objectFormatResult =
-        await githubApiHelper.tryGetRepositoryObjectFormat(
-          settings.authToken,
-          settings.repositoryOwner,
-          settings.repositoryName,
-          settings.githubServerUrl,
-          settings.ref,
-          settings.commit
-        )
-      if (!objectFormatResult.succeeded) {
-        objectFormatResult = await git.tryGetObjectFormat(repositoryUrl)
-      }
-      const objectFormat = objectFormatResult.succeeded
-        ? objectFormatResult.format
-        : ''
-      defaultBranch = objectFormatResult.defaultBranch || ''
-      if (objectFormat === 'sha256') {
-        core.info('Detected SHA-256 repository object format')
-      }
-      core.endGroup()
-
      core.startGroup('Initializing the repository')
-      await git.init(objectFormat)
+      await git.init()
      await git.remoteAdd('origin', repositoryUrl)
      core.endGroup()
    }
@@ -162,9 +138,6 @@ export async function getSource(settings: IGitSourceSettings): Promise<void> {
      core.startGroup('Determining the default branch')
      if (settings.sshKey) {
        settings.ref = await git.getDefaultBranch(repositoryUrl)
-      } else if (defaultBranch) {
-        core.info(`Default branch '${defaultBranch}'`)
-        settings.ref = `refs/heads/${defaultBranch}`
      } else {
        settings.ref = await githubApiHelper.getDefaultBranch(
          settings.authToken,
@@ -11,12 +11,6 @@ import {getServerApiUrl} from './url-helper'

 const IS_WINDOWS = process.platform === 'win32'

-export interface RepositoryObjectFormatResult {
-  defaultBranch?: string
-  format: string
-  succeeded: boolean
-}
-
 export async function downloadRepository(
  authToken: string,
  owner: string,
@@ -128,84 +122,6 @@ export async function getDefaultBranch(
  })
 }

-export async function tryGetRepositoryObjectFormat(
-  authToken: string,
-  owner: string,
-  repo: string,
-  baseUrl?: string,
-  ref?: string,
-  commit?: string
-): Promise<RepositoryObjectFormatResult> {
-  try {
-    const commitFormat = getObjectFormat(commit)
-    if (commitFormat) {
-      return {format: commitFormat, succeeded: true}
-    }
-
-    const octokit = github.getOctokit(authToken, {
-      baseUrl: getServerApiUrl(baseUrl)
-    })
-
-    let branchName = getBranchName(ref)
-    let defaultBranch = ''
-    if (!branchName) {
-      const repository = await octokit.rest.repos.get({owner, repo})
-      defaultBranch = repository.data.default_branch
-      assert.ok(defaultBranch, 'default_branch cannot be empty')
-      branchName = defaultBranch
-    }
-
-    const branch = await octokit.rest.repos.getBranch({
-      owner,
-      repo,
-      branch: branchName
-    })
-    const branchFormat = getObjectFormat(branch.data.commit.sha)
-    if (branchFormat) {
-      return {
-        defaultBranch: defaultBranch || undefined,
-        format: branchFormat,
-        succeeded: true
-      }
-    }
-
-    core.debug('Unable to determine repository object format from commit SHA')
-    return {format: '', succeeded: false}
-  } catch (err) {
-    core.debug(
-      `Unable to determine repository object format: ${(err as any)?.message ?? err}`
-    )
-    return {format: '', succeeded: false}
-  }
-}
-
-function getBranchName(ref?: string): string {
-  if (!ref) {
-    return ''
-  }
-
-  const headsPrefix = 'refs/heads/'
-  if (ref.startsWith(headsPrefix)) {
-    return ref.substring(headsPrefix.length)
-  }
-
-  if (!ref.startsWith('refs/') && !getObjectFormat(ref)) {
-    return ref
-  }
-
-  return ''
-}
-
-function getObjectFormat(sha?: string): string {
-  if (/^[0-9a-fA-F]{64}$/.test(sha || '')) {
-    return 'sha256'
-  }
-  if (/^[0-9a-fA-F]{40}$/.test(sha || '')) {
-    return 'sha1'
-  }
-  return ''
-}
-
 async function downloadArchive(
  authToken: string,
  owner: string,
@@ -71,7 +71,7 @@ export async function getInputs(): Promise<IGitSourceSettings> {
    }
  }
  // SHA?
-  else if (result.ref.match(/^(?:[0-9a-fA-F]{40}|[0-9a-fA-F]{64})$/)) {
+  else if (result.ref.match(/^[0-9a-fA-F]{40}$/)) {
    result.commit = result.ref
    result.ref = ''
  }
@@ -258,9 +258,7 @@ export async function checkCommitInfo(
    }

    // Extract details from message
-    const match = commitInfo.match(
-      /Merge ([0-9a-f]{40}|[0-9a-f]{64}) into ([0-9a-f]{40}|[0-9a-f]{64})/
-    )
+    const match = commitInfo.match(/Merge ([0-9a-f]{40}) into ([0-9a-f]{40})/)
    if (!match) {
      core.debug('Unexpected message format')
      return