Automation snippets

11 snippets

• Bash

  Retry a shell command with backoff

  Re-run a flaky command a few times with increasing delays and a clear failure exit code.

• Bash

  Parse command-line flags with getopts

  Handle -v, -o FILE and -h in a bash script with getopts and a usage message.

• Bash

  Run commands in parallel with xargs

  Process many files concurrently with xargs -P, safely handling spaces and newlines in names.

• Bash

  Timestamped logging functions for scripts

  Small log, warn and die helpers that write ISO timestamps to stderr and keep stdout clean for data.

• Bash

  List files changed compared with main

  Get the files added, copied, modified or renamed on your branch, useful for linting or testing only what changed.

• Bash

  Delete files older than N days

  Safely remove old log or temp files with find, previewing first and handling unusual filenames.

• Bash

  Clean up temporary files with trap

  Create a temp directory and guarantee it is removed when the script exits, fails or is interrupted.

• Bash

  Check that required commands are installed

  Fail early with a helpful message when a script depends on tools that are missing.

• Bash

  Timestamped tar.gz backup that keeps the newest N

  Archive a directory with a sortable timestamp and delete older backups beyond a retention count.

• Bash

  Delete local Git branches that are already merged

  Clean up merged local branches safely, excluding main, master, develop and the current branch.

• Bash

  Safe header for Bash scripts

  Fail fast on errors, unset variables and broken pipes, and clean up temp files with a trap.