moose-git/shrug-commit at main · Afats/moose-git · GitHub

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#!/bin/dash

#TODO: handle -a and -m together?

export PATH="$PATH:/tmp_amd/reed/export/reed/1/z5232937/2041/ass1" # change to pwd?

shrug=".shrug"
stage=".stage"
commit=".commit"
index=".index"
cfile=".shrug/commit_num.txt"

# check if .shrug exists
if [ -d "$shrug" ]
then
    add_all=0
    a_flag=0
    m_flag=0

    # f is an internal, hidden option to force commit
    while getopts "afm:" options; do
        case "$options" in
            a)  add_all=1
                ignore=1
                a_flag=1
                ;;
            f)  add_all=0
                ignore=1
                ;;
            m)  commit_msg="$OPTARG"
                ignore=0
                add_all=0
                m_flag=1
                ;;
            *)  add_all=0
                ignore=0
                ;;
        esac
    done

    # if -a and -m
    if [ $a_flag -eq 1 ] && [ $m_flag -eq 1 ]
    then
        # -a values takes precedence over -m values
        add_all=1
        ignore=1
    fi

    if [ $add_all -eq 1 ]
    then
        # -a option present
        # shrug-add all files in current dir, then shrug-commit
        dir=$(pwd)
        for file in "$dir"/*
        do
            shrug-add "$file"
        done

        # commit regardless of no change in files
        shrug-commit -f "$commit_msg"
    else

        if [ -d "$shrug/$commit" ]
        then
            # copy contents of file into index
            :
        else
            # mkdir and then copy contents into index
            mkdir "$shrug/$commit"
        fi

        if [ -f $cfile ]
        then
            # overrite index number to existing value +1
            cval=$(cat "$cfile")
            cval=$(( cval + 1 ))
            echo $cval > $cfile
        else
            # commit is 0
            touch $cfile
            echo "0" > $cfile
            cval=0
        fi

        commit_subdir="${shrug}/${commit}/${cval}"
        mkdir $commit_subdir
        cmsgfile="${commit_subdir}/commit_msg.txt"

        # save a copy of ALL files in .index/.stage to .commit repo
        flag=0
        stage_files="${shrug}/${index}/${stage}"
        for file in "$stage_files"/*
        do
            cp "$file" $commit_subdir
            touch $cmsgfile
            echo "$commit_msg" > $cmsgfile
            flag=1
        done

        # check if there is a need to commit or files have been unchanged from stage (or last commit?) or dont exist
        if ([ $cval -ge 1 ] && [ $ignore -eq 0 ])
        then
            old_cval=$(( cval - 1))

            diff_res=$(diff -b "$commit_subdir/list.txt" "$shrug/$commit/$old_cval/list.txt")

            if [ -z "$diff_res" ]
            then

                echo "nothing to commit" >& 2
                # remove latest commit and rst cval
                rm -r $commit_subdir

                if [ -f $cfile ]
                then
                    # overrite index number to existing value -1
                    o_cval=$(cat "$cfile")

                    if [ $o_cval -gt 0 ]
                    then
                        o_cval=$(( o_cval - 1 ))
                        echo $o_cval > $cfile
                    fi
                else
                    # commit is 0
                    touch $cfile
                    echo "0" > $cfile
                    cval=0
                fi

                flag=0
                exit 0
            fi

        # if nothing is staged
        elif ([ ! -d $stage_files ] && [ $ignore -eq 0 ])
        then
            echo "nothing to commit" >& 2
            # remove latest commit
            rm -r $commit_subdir

            if [ -f $cfile ]
            then
                # overrite index number to existing value -1
                    o_cval=$(cat "$cfile")

                    if [ $o_cval -gt 0 ]
                    then
                        o_cval=$(( o_cval - 1 ))
                        echo $cval > $cfile
                    fi
            else
                # commit is 0
                touch $cfile
                echo "0" > $cfile
                cval=0
            fi

            flag=0
            exit 0
        else
            :
        fi

        if [ $flag -eq 1 ]
        then
            echo "Committed as commit ${cval}"

            if [ -f "$shrug/to_commit.txt" ]
            then
                rm -f "$shrug/to_commit.txt"
            fi
        else
            :
        fi
    fi
else
    echo "shrug-commit: error: no .shrug directory containing shrug repository exists" >&2
    exit 1
fi