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fix: ensure SSH signing key has trailing newline (#834)

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ssh-keygen requires a trailing newline to parse private keys correctly.
Without it, git signing fails with the confusing error:
'Couldn't load public key: No such file or directory?'

This normalizes the key to always end with a newline before writing.
This commit is contained in:
Ashwin Bhat
2026-01-16 14:44:22 -08:00
committed by GitHub
parent a017b830c0
commit 6e896a06bb
2 changed files with 47 additions and 1 deletions
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7
src/github/operations/git-config.ts
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@@ -82,8 +82,13 @@ export async function setupSshSigning(sshSigningKey: string): Promise<void> {
const sshDir = join(homedir(), ".ssh");
await mkdir(sshDir, { recursive: true, mode: 0o700 });
// Ensure key ends with newline (required for ssh-keygen to parse it)
const normalizedKey = sshSigningKey.endsWith("\n")
? sshSigningKey
: sshSigningKey + "\n";
// Write the signing key atomically with secure permissions (600)
await writeFile(SSH_SIGNING_KEY_PATH, sshSigningKey, { mode: 0o600 });
await writeFile(SSH_SIGNING_KEY_PATH, normalizedKey, { mode: 0o600 });
console.log(`✓ SSH signing key written to ${SSH_SIGNING_KEY_PATH}`);
// Configure git to use SSH signing