littlefs-watch.sh

#!/bin/bash

set -uo pipefail

SRC=(lfs.c lfs_util.c)
HDR=(${SRC[@]/%.c/.h})

export CC='arm-none-eabi-gcc -mthumb'
export CFLAGS='-DLFS_NO_ASSERT -DLFS_NO_DEBUG -DLFS_NO_WARN -DLFS_NO_ERROR'
export BUILDDIR=watch

diff=""

while [ $# -gt 0 ]
do
    case $1 in
        -d|--diff) diff=1 ;;
        *)
            echo "usage $0 [-d]"
            exit 1
            ;;
    esac
    shift
done

mkdir -p $BUILDDIR

while true
do
    # Compile
    make -j $BUILDDIR/lfs.csv

    if [ $? -eq 0 ]
    then
        # Keep the last two builds
        if [ -f $BUILDDIR/lfs.1.current.csv ]
        then
            mv $BUILDDIR/lfs{.1.current,.2.previous}.csv
        fi

        cp $BUILDDIR/lfs{,.1.current}.csv

        # Keep build on most recent clean commit
        if git diff --exit-code --quiet
        then
            cp $BUILDDIR/lfs{,.3.commit}.csv
        fi
    fi

    # Print summary for each build, note that this
    # accepts other, manually added, csv files!
    prev=""
    for build in $(ls -r $BUILDDIR/lfs.*.csv)
    do
        name="${build%%.csv}"
        name="${name##*.}"
        ./scripts/summary.py $build ${diff:+-d ${prev:-$build}} -Y \
            | sed -e "s/.\{,27\}//; 2s/.\{,11\}/$(printf "%-10s " $name)/" \
            | tail ${prev:+-n1}
        prev=$build
    done

    # Wait for events
    inotifywait -rqe modify ${HDR[@]} ${SRC[@]}
done