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diff --git a/bin/change-all-repos b/bin/change-all-repos
new file mode 100755
index 0000000..265aec5
--- /dev/null
+++ b/bin/change-all-repos
@@ -0,0 +1,120 @@
+#!/usr/bin/env python3
+
+import os.path
+import subprocess
+import sys
+from typing import List
+
+
+BIN_DIR = os.path.dirname(__file__)
+SWH_ENV_DIR = os.path.join(BIN_DIR, "..")
+
+
+def list_repos() -> List[str]:
+ proc = subprocess.run([os.path.join(BIN_DIR, "ls-all-repos")], capture_output=True)
+ return proc.stdout.decode().split()
+
+
+def change_repo(repo: str, command: str, commit_message: str):
+ path = os.path.join(SWH_ENV_DIR, repo)
+
+ print()
+ print("="*50)
+ print(f"In {repo}")
+
+ # Check the repo doesn't have any uncommitted changes to tracked files
+ proc = subprocess.run(
+ ["git", "-C", path, "status", "--porcelain"],
+ capture_output=True,
+ encoding="utf8",
+ check=True,
+ )
+ if proc.stdout.strip():
+ print(f"Repository {repo} has local changes:\n{proc.stdout}")
+ print(f"Skipping {repo}.")
+ return
+
+ # Check the repo is on the master branch
+ proc = subprocess.run(
+ ["git", "-C", path, "rev-parse", "--abbrev-ref", "HEAD"],
+ capture_output=True,
+ encoding="utf8",
+ check=True,
+ )
+ current_branch = proc.stdout.strip()
+ if current_branch != "master":
+ print(f"Repository {repo} is not on branch master, but on: {current_branch}")
+ print(f"Skipping {repo}.")
+ return
+
+ # Pull from the default remote
+ proc = subprocess.run(
+ ["git", "-C", path, "pull", "--ff-only"], capture_output=True, encoding="utf8",
+ )
+
+ # Run the main command
+ proc = subprocess.run(command, shell=True, cwd=path)
+ if proc.returncode != 0:
+ print(f"Command for {repo} failed.")
+ response = input("Ignore and continue? [Y/n] ")
+ if response.lower() in ("", "y"):
+ print(f"Skipping {repo}")
+ return
+ else:
+ exit(1)
+
+
+ # Show the changes
+ proc = subprocess.run(
+ ["git", "-C", path, "diff", "--color=always"],
+ capture_output=True,
+ encoding="utf8",
+ check=True,
+ )
+
+ if proc.stdout.strip():
+ print(f"Changes for {repo}:")
+ print(proc.stdout)
+ print()
+
+ # Let the user check the change is ok
+ response = input("Commit and push? [Y/n] ")
+ if response.lower() not in ("", "y"):
+ print(f"Skipping {repo}")
+ return
+ else:
+ print(f"Command for {repo} did not change any file.")
+ response = input("Ignore and continue? [Y/n] ")
+ if response.lower() in ("", "y"):
+ print(f"Skipping {repo}")
+ return
+ else:
+ exit(1)
+
+ # Commit the changes
+ proc = subprocess.run(
+ ["git", "-C", path, "commit", "-a", "-m", commit_message],
+ encoding="utf8",
+ check=True,
+ )
+
+ # Push to the default remote
+ proc = subprocess.run(
+ ["git", "-C", path, "push"], capture_output=True, encoding="utf8",
+ )
+
+
+def main(command: str, commit_message: str):
+ repos = list_repos()
+ for repo in repos:
+ change_repo(repo, command, commit_message)
+
+
+if __name__ == "__main__":
+ if len(sys.argv) == 3:
+ (_, command, commit_message) = sys.argv
+ else:
+ print(f"Syntax: {sys.argv[0]} <shell command to run> <commit message>")
+ exit(1)
+
+ main(command, commit_message)

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