Find file in git based on md5 checksum.

gistfile1.sh

#!/bin/sh

CHECKSUM=$1
FILE=$2

if [[ -z "$CHECKSUM" ]]; then
    echo "Usage: $0 md5 file"
    exit 1
elif [[ -z "$FILE" ]]; then
    echo "Usage: $0 md5 file"
    exit 1
fi

# Check if valid git repo
git status &> /dev/null

if [[ $? -ne 0 ]]; then
    echo "Not a valid git repo."
    exit 1
fi

# git revision for file
REVS=`git log --pretty=%H -- $FILE`

# check each revision for checksum
for rev in $REVS; do
    git show $rev:$FILE > _file_to_check
    # if you are on a Linux system, change md5 to md5sum
    if [[ -n `md5 _file_to_check | grep $CHECKSUM` ]]; then
        echo $rev
    fi
    rm _file_to_check
done

I just found this piece of code which helped me while debugging. Just in case someone else will need it, here's my changes:

 # Check if valid git repo
-git status &> /dev/null
+ROOT=$(git rev-parse --show-toplevel)
 if [[ $? -ne 0 ]]; then
     echo "Not a valid git repo."
     exit 1
 fi
+cd "$ROOT"

-if [[ -n `md5 _file_to_check | grep $CHECKSUM` ]]; then
+if [[ -n `md5sum _file_to_check | grep $CHECKSUM` ]]; then