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keesterbrugge/git_export_all_file_versions

Created June 12, 2019 12:27
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script to query git for all previous versions of file
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git_export_all_file_versions
#!/bin/bash
# we'll write all git versions of the file to this folder:
EXPORT_TO=/tmp/all_versions_exported
# take relative path to the file to inspect
GIT_PATH_TO_FILE=$1
# ---------------- don't edit below this line --------------
USAGE="Please cd to the root of your git proj and specify path to file you with to inspect (example: $0 some/path/to/file)"
# check if got argument
if [ "${GIT_PATH_TO_FILE}" == "" ]; then
echo "error: no arguments given. ${USAGE}" >&2
exit 1
fi
# check if file exist
if [ ! -f ${GIT_PATH_TO_FILE} ]; then
echo "error: File '${GIT_PATH_TO_FILE}' does not exist. ${USAGE}" >&2
exit 1
fi
# extract just a filename from given relative path (will be used in result file names)
GIT_SHORT_FILENAME=$(basename $GIT_PATH_TO_FILE)
# create folder to store all revisions of the file
if [ ! -d ${EXPORT_TO} ]; then
echo "creating folder: ${EXPORT_TO}"
mkdir ${EXPORT_TO}
fi
## uncomment next line to clear export folder each time you run script
#rm ${EXPORT_TO}/*
# reset coutner
COUNT=0
# iterate all revisions
git rev-list --all --objects -- ${GIT_PATH_TO_FILE} | \
cut -d ' ' -f1 | \
while read h; do \
COUNT=$((COUNT + 1)); \
COUNT_PRETTY=$(printf "%04d" $COUNT); \
COMMIT_DATE=`git show $h | head -3 | grep 'Date:' | awk '{print $4"-"$3"-"$6}'`; \
if [ "${COMMIT_DATE}" != "" ]; then \
git cat-file -p ${h}:${GIT_PATH_TO_FILE} > ${EXPORT_TO}/${COUNT_PRETTY}.${COMMIT_DATE}.${h}.${GIT_SHORT_FILENAME};\
fi;\
done
# return success code
echo "result stored to ${EXPORT_TO}"
exit 0
@keesterbrugge
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from here https://stackoverflow.com/questions/12850030/git-getting-all-previous-version-of-a-specific-file-folder

Usage example

cd /home/myname/my-git-repo

git_export_all_file_versions docs/howto/readme.txt
    result stored to /tmp/all_versions_exported

ls /tmp/all_versions_exported
    0001.17-Oct-2016.ee0a1880ab815fd8f67bc4299780fc0b34f27b30.readme.txt
    0002.3-Oct-2016.d305158b94bedabb758ff1bb5e1ad74ed7ccd2c3.readme.txt
    0003.29-Sep-2016.7414a3de62529bfdd3cb1dd20ebc1a977793102f.readme.txt
    0004.28-Sep-2016.604cc0a34ec689606f7d3b2b5bbced1eece7483d.readme.txt
    0005.28-Sep-2016.198043c219c81d776c6d8a20e4f36bd6d8a57825.readme.txt
    0006.9-Sep-2016.5aea5191d4b86aec416b031cb84c2b78603a8b0f.readme.txt
    <and so on and on . . .>

@keesterbrugge
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keesterbrugge commented Jun 12, 2019 •
edited
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see https://github.com/truist/settings/blob/master/bin/git_export_all_file_versions for improved version, different answer from same stack overflow page

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