got/got-rm at main · haidara02/got · GitHub

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#!/bin/dash

command="$0"

if [ ! -d ".got" ]
then
    echo "$command: error: got repository directory .got not found" 1>&2
    exit 1
fi

usage_error() {
    echo "usage: $command [--force] [--cached] <filenames>" 1>&2
    exit 1
}

# Assumption: options will be in the position and order shown in the usage
if [ "$#" = 0 ]
then
    usage_error
fi

force=false
cached=false
for arg in "$@"
do
    if [ "$arg" = "--force" ]; then
        force=true
        shift
        continue
    elif [ "$arg" = "--cached" ]; then
        cached=true
        shift
        continue
    else
        break
    fi
done

protect_changes() {
    # previous commit
    p=$(find ".got/commits/" -type d -name ".commit.*" -printf "%f\n" | sort | tail -1 | grep -Eo ".$")
    if [ -z "$p" ]
    then
        # no history of commits && there are staged changes in index
        echo "$command: error: '$1' has staged changes in the index"
        exit 1
    fi

    # check if file doesn't exist in latest commit or if the commit file is different from index's
    commit_diff=$([ ! -e ".got/commits/.commit.$p/$1" ] || ! diff -r ".got/index/$1" ".got/commits/.commit.$p/$1" > /dev/null && echo "true" || echo "false")
    # check if file doesn't exist in cwd or if the cwd file is different from index's
    working_diff=$([ ! -e "$1" ] || ! diff -r ".got/index/$1" "$1" > /dev/null && echo "true" || echo "false")

    if [ "$commit_diff" = "true" ] && [ "$working_diff" = "true" ]
    then
        echo "$command: error: '$1' in index is different to both the working file and the repository"
        exit 1 #E1
    elif [ "$cached" = true ]
    then
        return
    elif [ "$commit_diff" = "true" ]
    then
        echo "$command: error: '$1' has staged changes in the index"
        exit 1 #E2
    elif [ "$working_diff" = "true" ]
    then
        echo "$command: error: '$1' in the repository is different to the working file"
        exit 1 #E3
    fi
}

for file in "$@"
do
    if echo "$file" | grep -Eq "^-"
    then
        usage_error
    elif [ ! -f ".got/index/$file" ]
    then
        echo "$0: error: '$file' is not in the got repository"
        exit 1
    fi
done

for file in "$@"
do
    if [ "$force" = false ]
    then
        protect_changes "$file"
    fi

    if [ "$cached" = false ]
    then
        rm "$file"
    fi

    rm ".got/index/${file}"
done