git cat

Herding a catalogue of git repositories

usage: git cat [-c CATALOGUE] [-p PREFIX] [-q] [-h] [-m MOVETO]

<command> [options] ...

Simultaneously synchronise multiple local and remote git repositories

Optional arguments:

-c CATALOGUE, --catalogue CATALOGUE
	specify the catalogue of git repositories (default: /Users/andrew/.dotfiles/config/gitcatrc)
-p PREFIX, --prefix PREFIX
	Prefix directory name containing all repositories
-q, --quiet	Print messages only if repository changes
-h, --help	help: for extended help use -hh and -hhh
-m MOVETO, --moveto MOVETO
	Move repository to specified position in catalogue

Commands:

add               Add current repository to the catalogue
branch            Print status of all branches in each repository
commit            Commit changes in all repositories
diff              Print a diff of the changes in each repository
fetch             Fetch all repositories from remote repositories
install           Install repository from the catalogue
ls                List all repositories in the catalogue
pull              Pull all repositories from remote repositories
push              Commit and push local repositories to remote repositories
remote-set-ssh    Change all remote URLs to use ssh access
remove            Remove repository from the catalogue
status            Print the status of all repositories

Git cat is a command line tool for synchronising multiple git repositories with remote servers from the command line. This tool is not intended to be used on large projects with multiple developers but, instead, it is aimed at the lone developer who has wants to synchronise multiple git repositories that live on several computers. In particular, with one git cat command you can run git commands on multiple git repositories, such as pushing or pulling from remote servers, such as bitbucket and github. When pushing, any local changes to the repositories will be automatically commited.

Git cat provides only a thin veneer over git. It does not support all git commands and nor does it support the full functionality of those git commands that it does support. The git cat philosophy is to "do no harm" so, when possible, it uses dry-runs before changing any repository and it will only change a repository if the dry-run succeeds. Any problems encountered by git cat are printed to the terminal (stdout). The aim of git cat is to streamline the management of multiple git repositories so, by default, it prints a summary of what it does to each repository to the terminal.

By default, the git cat commands are applied to all of the repositories that are managed by git cat, however, repositories that the command is applied to by supplying a regular expression.

Examples:

> git cat pull       # pull from all repositories
> git cat pull Code  # pull from all "Code" repositories

This makes it possible, for example, to push or pull from related git repositories that are in different directories.

The remote repositories are accessed in the normal way using git. Ideally, they will be set up with ssh access so that passwords are not required. If git requires a password for a repository then you will be prompted to supply it in the usual way.

The gitcatrc file

The gitcatrc file contains the catalogue of repositories maintained by git cat. This file will be stored in the directory ~/.dotfiles/config, if it exists, and otherwise it defaults to ~/.gitcatrc. This location of this file can be changed from the command line using the -c command line option.

The git cat commands are only applied to those repositories that have been "installed" using git cat install. Consequently, if the gitcatrc file is itself in a git repository then different computers that use this file can synchronise different repositories using git cat.

git cat add

usage: git cat add [-h] [-d GIT_DIRECTORY] [-q]

Add current repository to the catalogue

optional arguments:

-h, --help	show this help message and exit
-d GIT_DIRECTORY, --directory GIT_DIRECTORY
	Add repository from specified directory
-q, --quiet	only print "important" messages

Add the current repository to the catalogue stored in the gitcatrc file. An error is returned if any of the following hold: - the current directory is already in the git cat catalogue - the current directory is not contained in a git repository - the current directory does not have a remote a git repository

Example:

> git cat add  # add the current directory to the catalogue

git cat branch

usage: git cat branch [-h] [-q] [repositories]

Print status of all branches in each repository

positional arguments:

repositories optionally filter repositories for status

optional arguments:

-h, --help	show this help message and exit
-q, --quiet	only print "important" messages

Run git branch --verbose in selected repositories in the catalogue. This gives a summary of the status of the branches in the repositories managed by git cat.

Example:

> git cat branch Code
Code/Project1
  python3 6c2fcd5 Putting out the washing
Code/Project2
  master  2d2614e [ahead 1] Making some important changes
Code/Project3        already up to date
Code/Project4        already up to date
Code/Project5
  branch1 14fc541 Adding braid method to tableau
  * branch2       68480a4 git cat: updating   doc/README.rst
  master             862e2f4 Adding good stuff
Code/Project6            already up to date

git cat commit

usage: git cat commit [-h] [-a] [-b] [-d] [-v] [-q] [repositories]

Commit changes in all repositories

positional arguments:

repositories optionally filter repositories for status

optional arguments:

-h, --help	show this help message and exit
-a, --all	automatically stage files that have been modified and deleted
-b, --branch	Show the branch and tracking information
-d, --dry-run	Show what would be committed without committing
-v, --verbose	Print a unified diff for the commit
-q, --quiet	only print "important" messages

Commit all changes in the selected repositories in the catalogue. The commit message will list the files that were changed. This command is provided mainly for completeness and, instead, git cat push would probably be used.

Example:

> git cat commit

git cat diff

usage: git cat diff [-h] [--name-only] [--name-status] [--numstat]

[--shortstat] [--summary] [-q] [repositories]

Print a diff of the changes in each repository

positional arguments:

repositories optionally filter repositories for status

optional arguments:

-h, --help	show this help message and exit
--name-only	Show only names of changed files
--name-status	Show only names and status of changed files
--numstat	Show number of added and deleted lines without abbreviating
--shortstat	Print number of modified files and number of added/deleted line
--summary	Print condensed summary of changes
-q, --quiet	only print "important" messages

Run git diff with various options on the repositories in the catalogue.

Example:

> git cat diff Code
Code/Project1  up to date
Code/Project2  up to date
Code/GitCat    diff --git c/gitcat.py w/gitcat.py
index b32a07f..c32a435 100644
--- c/gitcat.py
+++ w/gitcat.py
@@ -29,16 +29,25 @@ *Examples*:

-gitcatrc:
+The gitcatrc file:

git cat fetch

usage: git cat fetch [-h] [--all] [--dry-run] [-f] [-p] [-t] [-q]

[repositories]

Fetch all repositories from remote repositories

positional arguments:

repositories optionally filter repositories for status

optional arguments:

-h, --help	show this help message and exit
--all	Fetch all branches
--dry-run	Print what would be done without doing it
-f, --force	Fetch even if there are changes
-p, --prune	Before fetching, remove any remote-tracking references that no longer exist on the remote
-t, --tags	Fetch all tags from remote repositories
-q, --quiet	only print "important" messages

Run git fetch -q --progress on the installed git cat repositories.

Example:

> git cat fetch
Rep1  already up to date
Rep2  already up to date
Rep3  remote: Counting objects: 3, done.
  remote: Compressing objects:  33% (1/3)
  remote: Compressing objects:  66% (2/3)
  remote: Compressing objects: 100% (3/3)
  remote: Compressing objects: 100% (3/3), done.
  remote: Total 3 (delta 2), reused 0 (delta 0)

git cat install

usage: git cat install [-h] [-d] [-q] [repositories]

Install repository from the catalogue

positional arguments:

repositories optionally filter repositories for status

optional arguments:

-h, --help	show this help message and exit
-d, --dry-run	Do everything except actually install the repositories
-q, --quiet	only print "important" messages

Install listed repositories from the catalogue.

If a directory exists but is not a git repository then initialise the repository and fetch from the remote.

By default all repositories are installed, however, by specifying a regular expression for the repositories you can install a subset of the repositories managed by git cat.abs

Examples:

> git cat install       # install all repositories managed by git cat
> git cat install Code  # install all "Code" repositories managed by git cat

git cat ls

usage: git cat ls [-h] [-q] [repositories]

List all repositories in the catalogue

positional arguments:

repositories optionally filter repositories for status

optional arguments:

-h, --help	show this help message and exit
-q, --quiet	only print "important" messages

List the repositories managed by git cat, together with the location of their remote repository.

Example:

> git cat ls
Code/Project1  = git@bitbucket.org:AndrewsBucket/prog1.git
Code/Project2  = git@bitbucket.org:AndrewsBucket/prog2.git
Code/Project3  = git@bitbucket.org:AndrewsBucket/prog3.git
Code/Project4  = git@bitbucket.org:AndrewsBucket/prog4.git
Code/GitCat    = git@gitgithub.com:AndrewMathas/gitcat.git
Notes/Life     = git@gitgithub.com:AndrewMathas/life.git
Stuff          = git@some.random.rep.com:Me/stuffing.git

git cat pull

usage: git cat pull [-h] [--all] [-d] [--ff-only] [--squash] [--stat] [-t]

[-s <STRATEGY>] [--recursive] [--theirs] [--ours] [-q] [repositories]

Pull all repositories from remote repositories

positional arguments:

repositories optionally filter repositories for status

optional arguments:

-h, --help	show this help message and exit
--all	Pull all branches
-d, --dry-run	Print what would be done without doing it
--ff-only	Fast-forward only merge
--squash	Squash the merge
--stat	Show a diffstat at the end of the merge
-t, --tags	Fetch all tags from remote repositories
-s <STRATEGY>, --strategy <STRATEGY>
	Use the specified merge strategy
--recursive	Use recursive three-way merge
--theirs	Resolve merge conflicts favouring remote repository
--ours	Resolve merge conflicts favouring local repository
-q, --quiet	only print "important" messages

Run through all repositories and update them if their directories already exist on this computer. Unless the --quiet option is used, a message is printed to give the summarise the status of the repository.

Example:

> git cat pull
Code/Project1  already up to date
Code/Project2  already up to date
Code/GitCat    already up to date
  remote: Counting objects: 8, done.
  remote: Total 8 (delta 6), reused 0 (delta 0)
Notes/Life     already up to date

git cat push

usage: git cat push [-h] [-d] [--all] [--prune] [--tags] [-q] [repositories]

Commit and push local repositories to remote repositories

positional arguments:

repositories optionally filter repositories for status

optional arguments:

-h, --help	show this help message and exit
-d, --dry-run	Do everything except actually send the updates
--all	Push all branches
--prune	Remove remote branches that don't have a local counterpart
--tags	Push all tags
-q, --quiet	only print "important" messages

Run through all installed repositories and push them to their remote repositories. Any uncommitted repository with local changes will be committed and the commit message listing the files that have changed. Unless the -quiet option is used, a summary of the status of each repository is printed with each push.

Example:

> git cat push
Code/Project1  pushed
  To bitbucket.org:AndrewsBucket/dotfiles.git
  refs/heads/master:refs/heads/master       e128dd9..904f96a
  Done
Code/Project2  up to date
Code/Project3  up to date
Code/Project4  up to date
Code/GitCat    commit
  [master 442822d] git cat: updating   gitcat.py
  1 file changed, 44 insertions(+), 5 deletions(-)
  To bitbucket.org:AndrewsBucket/gitcat.git
  refs/heads/master:refs/heads/master       6ffeb9d..442822d
  Done
Notes/Life     up to date

git cat remote-set-ssh

usage: git cat remote-set-ssh [-h] [-q] [repositories]

Change all remote URLs to use ssh access

positional arguments:

repositories optionally filter repositories for status

optional arguments:

-h, --help	show this help message and exit
-q, --quiet	only print "important" messages

Make the URLs of all repositories use SSH access (rather than HHTPS). This is useful because it allows password-less once the user's public key has been uploaded to the remote repository.

This involves changing the remote URL from something like:

https://AndrewsBucket@bitbucket.org/AndrewsBucket/webquiz.git

to:

git@bitbucket.org:AndrewsBucket/webquiz.git

Example:

> git cat remote-set-ssh
Code/Project1  unchanged
Code/Project2  changed to ssh access
Code/Project3  unchanged

git cat remove

usage: git cat remove [-h] [-e] [-d GIT_DIRECTORY] [-q]

Remove repository from the catalogue

optional arguments:

-h, --help	show this help message and exit
-e, --everything
	Delete everything, including the directory
-d GIT_DIRECTORY, --directory GIT_DIRECTORY
	Remove repository from specified directory
-q, --quiet	only print "important" messages

Remove the current repository to the catalogue stored in the gitcatrc file. An error is returned if any of the following hold: - the current directory is not in the git cat catalogue - the current directory is not contained in a git repository

Example:

git cat remove  # remove the current directory to the catalogue

git cat status

usage: git cat status [-h] [-l] [-u CHOICE] [-q] [repositories]

Print the status of all repositories

positional arguments:

repositories optionally filter repositories for status

optional arguments:

-h, --help	show this help message and exit
-l, --local	Only compare with local repositories
-u CHOICE, --untracked-files CHOICE
	Show untracked files using git status mode (all, no, or normal)
-q, --quiet	only print "important" messages

Print a summary of the status of all of the repositories in the catalogue. The name is slightly misleading as this command does not just run git status on each repository and, instead, it queries the remote repositories to determine whether each repository is ahead or behind the remote repository.

Example:

> git cat status Code
Code/Project1  up to date
Code/Project2  ahead 1
Code/Project3  up to date
Code/Project4  behind 1
Code/GitCat    uncommitted changes in 3 files
  M README.rst
  M git-options.ini
  M gitcat.py

Author

Andrew Mathas

git cat Version 1.0

Copyright (C) 2018

GNU General Public License, Version 3, 29 June 2007

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License (GPL) as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.