ghistory

#!/usr/bin/env sh

# A way of viewing editted files in a simple interface You can list all
# files or just files within the current directory.
#
# Usage:
#     Show the most recently editted files in the current directory
#     `ghistory log --pretty='' --name-only | awk '!seen[$0]++' | tac`
#
#     ... or use this more convenient alias
#     `ghistory CHANGED`
#
#     See all changes from the previous revision, in the current directory
#     `ghistory diff HEAD^ -- .`
#
#     Find out what changed in the last week at the current directory
#     `ghistory diff \"HEAD@{1 week ago}\" -- .`
#
#     See the changed files for the last 10 days
#     `ghistory log --since=\"10 days ago\" --pretty=format: --name-only | sort | uniq`
#
#     See the changed files for the last 10 days in the current directory
#     `ghistory log --since=\"10 days ago\" --pretty=format: --name-only -- . | sort | uniq`
#
#     Get the all-time diff of the files in the current directory
#     Reference: https://stackoverflow.com/a/5189296/3626104
#     `ghistory diff `ghistory rev-list --max-parents=0 HEAD` -- .`
#     or, using a hard-coded alias:
#     `ghistory diff ORIGINAL -- .`
#
#     Search any content in the files in the current directory
#     `ghistory grep -n foo -- .`
#
#     Search for git commits which contain a phrase through EVERY revision of every file in the current directory
#     `ghistory log -Sthing -- . | grep commit`
#
#     Get the search contents for each commit that contains a phrase through EVERY revision of every file in the current directory
#     `ghistory log -Sthing -- . | grep commit | cut -d" " -f2 | xargs -I{} sh -c "ghistory diff {}^..{} | grep thing"`
#
#     Give the current state of this file as it was 10 days ago
#     `ghistory checkout \'master@{7 days ago}\' -- foo.txt`
#
#     Restore a previous version of a file
#     Reference: https://stackoverflow.com/a/57676960/3626104
#     `ghistory restore --source=\'HEAD@{1 week ago}\' foo.txt`  # Requires git 2.23+
#
# Reference:
#     http://dev.bennage.com/blog/2012/02/01/finding-stuff-in-your-git-repo-2/
#     https://dev.to/iggredible/learn-git-grep-to-boost-your-command-line-search-jh7
#
BACKUP_DIRECTORY=~/.vim_custom_backups

# Reference: https://stackoverflow.com/a/21425102/3626104
USER_INPUT=$@

RELATIVE_DIRECTORY=`echo $PWD | sed 's:^[/\\]*::'`
BACKUP_CURRENT_DIRECTORY=$BACKUP_DIRECTORY/$RELATIVE_DIRECTORY

if [ "$USER_INPUT" = "CHANGED" -o "$USER_INPUT" = "CHANGED -- ." ]
then
    MODIFIED_INPUT="log --pretty='' --name-only"

    if [ "$USER_INPUT" = "CHANGED -- ." ]
    then
        MODIFIED_INPUT="log --pretty='' --name-only -- ."
    fi

    echo >&2 "cd $BACKUP_CURRENT_DIRECTORY && git $MODIFIED_INPUT | awk '!seen[$0]++' | tac | sed \"s:^$RELATIVE_DIRECTORY[/\\]*::g\""
    eval "cd $BACKUP_CURRENT_DIRECTORY && git $MODIFIED_INPUT" | awk '!seen[$0]++' | tac | sed "s:^$RELATIVE_DIRECTORY[/\\]*::g"

    exit 0
fi

# A small "alias" - make ORIGINAL refer to the first commit in the git repository
MODIFIED_INPUT=`echo $USER_INPUT | sed 's:ORIGINAL:\`ghistory rev-list --max-parents=0 HEAD\`:g'`

echo >&2 "cd $BACKUP_CURRENT_DIRECTORY && git $MODIFIED_INPUT"
eval "cd $BACKUP_CURRENT_DIRECTORY && git $MODIFIED_INPUT"