Add all forks of the current repo as remotes

github_get_all_forks.sh

#!/usr/bin/env bash
set -e

# See also: https://github.com/frost-nzcr4/find_forks (same thing but in python)

origin_url="$(git remote show origin | grep 'Fetch URL:' | sed 's+.*: ++')"

full_repo_name="$(echo "$origin_url" | sed 's+.*github.com/++ ; s+\.git$++')"

forks_url="https://api.github.com/repos/${full_repo_name}/forks"

#[ -e "forks.json" ] ||
curl -s "${forks_url}" -o forks.json

node -e "
  var forks = JSON.parse(fs.readFileSync('forks.json', 'utf-8'));
  forks.forEach(forkData => {
    console.log('git remote add \"' + forkData.owner.login + '\" \"' + forkData.git_url + '\"');
  });
  console.log('git fetch --all');
" |

if [ "$1" = -do ]
then bash
else
    cat
    echo
    echo "Pass -do to execute above commands"
fi

You can run this script in your current repo (and add the argument -do) to fetch all the forks on Github.

After fetching, you can do something like this to get an overview of what changed on all the different forks:

git log --remotes --stat --oneline --graph

Add --patch if you want to see the actual line-by-line changes. Use / to search then n and N to step through matches.

Nice script. But you didn't trim the .git from the end of full_repo_name and you left a hardcoded url in the call to curl. The curl line, when fixed, only pulled out 30 fork entries but I'm trying to use it on a repository that has over 400.

Nice use of node and readFileSync and the do bash option.

That GitHub URL passed to curl takes a page option.

I get an error

TypeError: forks.forEach is not a function
    at [eval]:3:9
    at ContextifyScript.Script.runInThisContext (vm.js:50:33)
    at Object.runInThisContext (vm.js:139:38)
    at Object.<anonymous> ([eval]-wrapper:6:22)
    at Module._compile (module.js:653:30)
    at evalScript (bootstrap_node.js:479:27)
    at startup (bootstrap_node.js:180:9)
    at bootstrap_node.js:625:3

Pass -do to execute above commands

maybe I need a specific nvm / npm

this worked for me
https://github.com/akumria/findforks/blob/master/findforks.py

UPDATE
I switched to node 13 - but problem persists.

@johndpope
That issue cropped up for me, because git output is localized. The translation doesn’t contain 'Fetch URL:'. The result was an empty "forks.json".

My solution was to replace the screen scraping with git config --get remote.origin.url. That worked.

See: https://gist.github.com/JanX2/f7fd01bbd37a863cbd0c6c3db6c37ca2