find file changes in all forks of a github repo

fetch-repos.sh

curl -i https://api.github.com/repos/scrooloose/nerdtree/forks |grep -e "git_url" |awk '{gsub(/,/,"");split($2,a,"/"); system("mkdir "a[4]"; cd "a[4]"; git clone " $2);}'

find-file-changes.sh

DIRS=$(find * -type d -name '*nerdtree' -maxdepth 1 -print)
FILECHANGE="plugin/NERD_tree.vim"
for d in $DIRS
do
        cd $d
        git fetch
        BRANCHES=$(git branch -a)
        OBS=$(git branch -r |egrep -v '(HEAD)')
        for ob in $OBS 
        do 
                git checkout -t $ob 2>/dev/null
                bonly=$(echo $ob |awk {'split($0,a,"/"); print a[2]'})
                git checkout $bonly &>/dev/null
                git pull &>/dev/null
                out=$(git log --pretty=format:"%H %ad" $FILECHANGING |head -n1 | xargs -I{} echo `pwd`"("$ob"): "{})
                echo $out
        done

        cd ../..
done

instructions.txt

#1 mkdir $working_dir; echo "modify fetch-repos.sh for your source repo"; cd $working_dir; bash fetch-repos.sh;
#2 echo "modify find-file-changes.sh to use the file you need"; cd $working_dir; bash find-file-changes.sh > all-branch-changes.txt
#3 cat all-branch-changes.txt |sort -k4M,7

This will output a list of fork:branche:commit for a specific file sorted by date of commit;

Note: this is kind of brittle and could break depending on the input data (ie the names of things in the repositories).

Thanks. This helps immensely!. Though the find gives errors sometimes. This is a better option: DIRS=$(find . -maxdepth 2 -type d -name '*nerdtree' -print)

I had a different use case. I needed to output all the diffs for a given file. Here follows my solution. It replaces the find-file-changes.sh

DIRS=$(find * -type d -name 'J2M' -maxdepth 2 -print)
FILECHANGE="index.js"
ORIGINAL=https://github.com/kylefarris/J2M.git
for d in $DIRS
do
	cd $d
        git fetch
	git remote add original $ORIGINAL
	git fetch original
	CURR_REP=$(pwd | rev | cut -f2 -d'/' - | rev)
	echo output to $CURR_REP
	git diff --ignore-cr-at-eol --ignore-space-at-eol -b -w --ignore-blank-lines HEAD original/master index.js --output=../../$CURR_REP.diff
        cd ../..
done