fix check for branch existence

src/create-or-update-branch.ts

@@ -1,7 +1,6 @@
 import * as core from '@actions/core'
 import {GitCommandManager, Commit} from './git-command-manager'
 import {v4 as uuidv4} from 'uuid'
-import * as utils from './utils'
 
 const CHERRYPICK_EMPTY =
   'The previous cherry-pick is now empty, possibly due to conflict resolution.'
@@ -66,38 +65,6 @@ export async function buildBranchCommits(
   return commits
 }
 
-export async function buildBranchFileChanges(
-  git: GitCommandManager,
-  base: string,
-  branch: string
-): Promise<BranchFileChanges> {
-  const branchFileChanges: BranchFileChanges = {
-    additions: [],
-    deletions: []
-  }
-  const changedFiles = await git.getChangedFiles([
-    '--diff-filter=AM',
-    `${base}..${branch}`
-  ])
-  const deletedFiles = await git.getChangedFiles([
-    '--diff-filter=D',
-    `${base}..${branch}`
-  ])
-  const repoPath = git.getWorkingDirectory()
-  for (const file of changedFiles) {
-    branchFileChanges.additions!.push({
-      path: file,
-      contents: utils.readFileBase64([repoPath, file])
-    })
-  }
-  for (const file of deletedFiles) {
-    branchFileChanges.deletions!.push({
-      path: file
-    })
-  }
-  return branchFileChanges
-}
-
 // Return the number of commits that branch2 is ahead of branch1
 async function commitsAhead(
   git: GitCommandManager,
@@ -176,7 +143,6 @@ interface CreateOrUpdateBranchResult {
   base: string
   hasDiffWithBase: boolean
   headSha: string
-  branchFileChanges?: BranchFileChanges
   branchCommits: Commit[]
 }
 
@@ -356,9 +322,6 @@ export async function createOrUpdateBranch(
   // Build the branch commits
   result.branchCommits = await buildBranchCommits(git, base, branch)
 
-  // Build the branch file changes
-  result.branchFileChanges = await buildBranchFileChanges(git, base, branch)
-
   // Get the pull request branch SHA
   result.headSha = await git.revParse('HEAD')