dev.sh

#!/bin/bash

# Notes:
# - use shellcheck for bash linter (https://github.com/koalaman/shellcheck)

### SETUP
### ============================================================================
set -e  # Bail at the first sign of trouble

# Notation Reference: https://unix.stackexchange.com/questions/122845/using-a-b-for-variable-assignment-in-scripts#comment685330_122848
: ${DEBUG:=0}
: ${CI:=0}  # Flag for if we are in CI - default to not.
: ${SKIP_BUILD:=0}  # Allow some commands to forcibly skip compose-build
: ${PORT:=8000}  # allows for some commands to change the port

if ! command -v toml &> /dev/null; then
    pip install --user toml-cli
fi

### CONTANTS
### ============================================================================
SOURCE_UID=$(id -u)
SOURCE_GID=$(id -g)
SOURCE_UID_GID="${SOURCE_UID}:${SOURCE_GID}"
GIT_REPOSITORY=$(git remote get-url origin 2>/dev/null | cut -d '/' -f 2 | cut -d '.' -f 1 | grep . || echo -n 'none')
GIT_COMMIT_SHORT=$(git rev-parse --short HEAD 2>/dev/null || echo -n 'none')
GIT_COMMIT=$(git rev-parse HEAD 2>/dev/null || echo -n 'none')
GIT_BRANCH=$(git rev-parse --abbrev-ref HEAD 2>/dev/null || echo -n 'none')
PACKAGE_NAME=$(toml get --toml-path pyproject.toml project.name)
PACKAGE_PYTHON_NAME=$(echo -n "$PACKAGE_NAME" | tr '-' '_')
PACKAGE_VERSION=$(toml get --toml-path pyproject.toml project.version)

: ${AUTOCLEAN_LIMIT:=10}

: ${PYTHON_PACKAGE_REPOSITORY:="pypi"}
: ${TESTPYPI_USERNAME="$USER-test"}

## Python Project Related
## -----------------------------------------------------------------------------
# You may want to customise these for your project
SOURCE_FILES="src tests"
MIN_PYTHON_VERSION="py38"

## Build related
## -----------------------------------------------------------------------------
BUILD_TIMESTAMP=$(date +%s)

if [[ "$GIT_BRANCH" == "master" || "$GIT_BRANCH" == "main" ]]; then
    BUILD_VERSION="${PACKAGE_VERSION}"
else
    # Tox doesn't like version labels like
    # python_template-0.0.0+3f2d02f.1667158525-py3-none-any.whl
    #BUILD_VERSION="${PACKAGE_VERSION}+${GIT_COMMIT_SHORT}.${BUILD_TIMESTAMP}"

    # Use PEP 440 non-compliant versions since we know it works
    BUILD_VERSION="${PACKAGE_VERSION}.${GIT_COMMIT_SHORT}"
fi

BUILT_WHEEL="${PACKAGE_PYTHON_NAME}-${BUILD_VERSION}-py3-none-any.whl"

## Load manifests
## -----------------------------------------------------------------------------
if [ -f "lib/manifest.env" ]; then
    echo "⚙️  loading lib/manifest.env"
    source lib/manifest.env
fi

if [ -f "locals.env" ]; then
    echo "⚙️  loading locals.env"
    source locals.env
fi

## Generate remaining vars

## Insert into .tmp/env
## -----------------------------------------------------------------------------
if [ ! -d .tmp ]; then
    mkdir .tmp
fi

echo "⚙️  writing .tmp/env"
cat > .tmp/env <<EOF
PACKAGE_NAME=${PACKAGE_NAME}
PACKAGE_PYTHON_NAME=${PACKAGE_PYTHON_NAME}
PACKAGE_VERSION=${PACKAGE_VERSION}
GIT_REPOSITORY=${GIT_REPOSITORY}
GIT_COMMIT_SHORT=${GIT_COMMIT_SHORT}
GIT_COMMIT=${GIT_COMMIT}
GIT_BRANCH=${GIT_BRANCH}
PYTHON_PACKAGE_REPOSITORY=${PYTHON_PACKAGE_REPOSITORY}
TESTPYPI_USERNAME=${TESTPYPI_USERNAME}
SOURCE_UID=${SOURCE_UID}
SOURCE_GID=${SOURCE_GID}
SOURCE_UID_GID=${SOURCE_UID_GID}
BUILD_TIMESTAMP=${BUILD_TIMESTAMP}
BUILD_VERSION=${BUILD_VERSION}
BUILD_DIR=.tmp/dist  # default
BUILT_WHEEL=${BUILT_WHEEL}
EOF

# workaround for old docker-compose versions
cp .tmp/env .env

### FUNCTIONS
### ============================================================================
## Docker Functions
## -----------------------------------------------------------------------------
function compose_build {
    heading2 "🐋 Building $1"
    if [ "$CI" = 1 ]; then
        docker compose build --progress plain $1

    elif [ "$DEBUG" = 1 ]; then
        docker compose build --progress plain $1

    else
        docker compose build $1
    fi
    echo
}

function compose_run {
    heading2 "🐋 running $@"
    docker compose -f docker-compose.yml run --rm "$@"
    echo
}

function docker_clean {
    heading2 "🐋 Removing $PACKAGE_NAME images"
    IMAGES=$(docker images --filter "reference=${PACKAGE_NAME}-asdf*" | tail -n +2)
    COUNT_IMAGES=$(echo -n "$IMAGES" | wc -l)
    if [ "$DEBUG" = 1 ]; then
        echo "IMAGES=$IMAGES"
        echo "COUNT_IMAGES=$COUNT_IMAGES"
    fi

    if [[ $COUNT_IMAGES -gt 0 ]]; then
        docker images | grep "$PACKAGE_NAME" | awk '{OFS=":"} {print $1, $2}' | xargs -t docker rmi
    fi
}


function docker_clean_unused {
    docker images --filter "reference=${PACKAGE_NAME}-*" -a | \
        tail -n +2 | \
        grep -v "$GIT_COMMIT" | \
        awk '{OFS=":"} {print $1, $2}' | \
        xargs -t docker rmi
}

function docker_autoclean {
    if [[ $CI = 0 ]]; then
        if [ "$DEBUG" = 1 ]; then
            heading2 "🐋 determining if need to clean"
        fi

        IMAGES=$(
            docker images --filter "reference=${PACKAGE_NAME}-*" -a |\
            tail -n +2 |\
            grep -v "$GIT_COMMIT" ;\
            /bin/true
        )
        COUNT_IMAGES=$(echo -n "$IMAGES" | wc -l)

        if [ "$DEBUG" = 1 ]; then
            echo "IMAGES=${IMAGES}"
            echo "COUNT_IMAGES=${COUNT_IMAGES}"
        fi

        if [[ $COUNT_IMAGES -gt $AUTOCLEAN_LIMIT ]]; then
            heading2 "Removing unused ${PACKAGE_NAME} images 🐋"
            docker_clean_unused
        fi
    fi
}

## Utility
## -----------------------------------------------------------------------------
function heading {
    # Print a pretty heading
    # https://en.wikipedia.org/wiki/Box-drawing_character#Unicode
    echo "╓─────────────────────────────────────────────────────────────────────"
    echo "║ $@"
    echo "╙───────────────────"
    echo
}

function heading2 {
    # Print a pretty heading-2
    # https://en.wikipedia.org/wiki/Box-drawing_character#Unicode
    echo "╓ $@"
    echo "╙───────────────────"
}

## Debug Functions
## -----------------------------------------------------------------------------
function check_file {
    # Pretty print if a file exists or not.
    if [[ -f "$1" ]]; then
        echo -e "$1 \e[1;32m EXISTS\e[0m"
    else
        echo -e "$1 \e[1;31m MISSING\e[0m"
    fi
}

function check_pyproject_toml {
    # Pretty print if the given key exists in pyproject.toml.
    if toml get --toml-path pyproject.toml $1 1>/dev/null 2>/dev/null; then
        echo -e "$1 \e[1;32m EXISTS\e[0m"
    else
        echo -e "$1 \e[1;31m MISSING\e[0m"
    fi
}

## Command Functions
## -----------------------------------------------------------------------------
function command_build {
    if [ -z $1 ] | [ "$1" = "dist" ]; then
        BUILD_DIR="dist"
    elif [ "$1" = "tmp" ]; then
        BUILD_DIR=".tmp/dist"
    else
        return 1
    fi

    # TODO: unstashed changed guard

    if [ ! -d $BUILD_DIR ]; then
        heading "setup 📜"
        mkdir $BUILD_DIR
    fi

    echo "BUILD_DIR=${BUILD_DIR}" >> .env
    echo "BUILD_DIR=${BUILD_DIR}" >> .tmp/env

    heading "build 🐍"
    if [ "$SKIP_BUILD" = 0 ]; then
        compose_build python-build
    fi
    compose_run python-build
}


function display_usage {
    echo "dev.sh - development utility"
    echo "Usage: ./dev.sh COMMAND"
    echo
    echo "           build    Build python packages"
    echo "           clean    Cleanup clutter"
    echo "           debug    Display debug / basic health check information"
    echo "            docs    Preview docs locally"
    echo "          format    Format files"
    echo "            help    Show this text"
    echo "            lint    Lint files. You probably want to format first."
    echo "            repl    Open Python interactive shell with the package imported"
    echo "                    If repl.py exists will use this file instead of default template."
    echo "             run    Run the given file in the python-common container"
    echo "             tag    Tag commit with current version"
    echo "            test    Run unit tests"
    echo "       test-full    Run unit tests on all python versions"
    echo "          upload    Upload built files to where they are distributed from (e.g. PyPI)"
    echo
    echo
}

### MAIN
### ============================================================================
case $1 in

    "format")
        if [[ $CI -gt 0 ]]; then
            echo "ERROR! Do not run format in CI!"
            exit 250
        fi
        heading "black 🐍"
        if [ "$SKIP_BUILD" = 0 ]; then
            compose_build python-common
        fi

        compose_run python-common \
            black --line-length 100 --target-version ${MIN_PYTHON_VERSION} $SOURCE_FILES

        ;;

    "lint")
        if [ "$SKIP_BUILD" = 0 ]; then
            compose_build python-common
        fi

        if [ "$DEBUG" = 1 ]; then
            heading2 "🤔 Debugging"
            compose_run python-common ls -lah
            compose_run python-common pip list
        fi

        heading "black - check only 🐍"
        compose_run python-common \
            black --line-length 100 --target-version ${MIN_PYTHON_VERSION} --check --diff $SOURCE_FILES

        heading "pylint 🐍"
        compose_run python-common pylint -j 4 --output-format=colorized $SOURCE_FILES

        heading "mypy 🐍"
        compose_run python-common mypy $SOURCE_FILES

        ;;

    "test")
        command_build tmp

        heading "tox 🐍"
        if [ "$SKIP_BUILD" = 0 ]; then
            compose_build python-tox
        fi
        compose_run python-tox tox -e ${MIN_PYTHON_VERSION}

        rm -rf .tmp/dist/*

        ;;

    "test-full")
        command_build tmp

        heading "tox 🐍"
        if [ "$SKIP_BUILD" = 0 ]; then
            compose_build python-tox
        fi
        compose_run python-tox tox

        rm -rf .tmp/dist/*

        ;;

    "build")
        command_build dist

        ;;

    "upload")
        heading "Upload to ${PYTHON_PACKAGE_REPOSITORY}"
        heading "setup 📜"
        if [[ -z $(pip3 list | grep keyrings.alt) ]]; then
            pip3 install --user keyrings.alt
            pip3 install --user twine
        fi

        if [ ! -d dist_uploaded ]; then
            mkdir dist_uploaded
        fi

        heading "upload 📜"
        twine upload --repository "${PYTHON_PACKAGE_REPOSITORY}" dist/*.whl

        echo "📜 cleanup"
        mv dist/* dist_uploaded

        ;;

    "repl")
        heading "REPL 🐍"
        if [[ -f "repl.py" ]]; then
            echo "Using provided repl.py"
            echo
            cp repl.py .tmp/repl.py
        else
            echo "Using default repl.py"
            echo
            cat > .tmp/repl.py <<EOF
import ${PACKAGE_PYTHON_NAME}
print('Your package is already imported 🎉\nPress ctrl+d to exit')
EOF
        fi

        if [ "$SKIP_BUILD" = 0 ]; then
            compose_build python-common
        fi
        compose_run python-common bpython --config bpython.ini -i .tmp/repl.py

        ;;

    "run")
        heading "Running 🐍"
        if [ "$SKIP_BUILD" = 0 ]; then
            compose_build python-common
        fi
        compose_run python-common "${@:2}"

        ;;

    "docs")
        heading "Preview Docs 🐍"
        if [ "$SKIP_BUILD" = 0 ]; then
            compose_build python-common
        fi
        compose_run -p 127.0.0.1:${PORT}:8080 python-common mkdocs serve -a 0.0.0.0:8080 -w docs

        ;;

    "clean")
        heading "Cleaning 📜"
        docker_clean

        echo "🐍 pyclean"
        if ! command -v pyclean &> /dev/null; then
            pip3 install --user pyclean
        fi
        pyclean src
        pyclean tests

        echo "🐍 remove build artifacts"
        rm -rf build dist "src/${PACKAGE_PYTHON_NAME}.egg-info"

        echo "cleaning .tmp"
        rm -rf .tmp/*

        ;;

    "debug")
        heading "Debug 📜"
        cat .tmp/env
        echo
        echo "Checking Directory Layout..."
        check_file "pyproject.toml"
        check_file "src/${PACKAGE_PYTHON_NAME}/py.typed"
        check_file "src/${PACKAGE_PYTHON_NAME}/__init__.py"
        check_file "src/${PACKAGE_PYTHON_NAME}/_version.py"
        echo
        echo "Checking pyproject.toml"
        check_pyproject_toml project.optional-dependencies.dev
        check_pyproject_toml tool.setuptools.package-data.${PACKAGE_PYTHON_NAME}

        echo

        ;;

    "tag")
        heading "Tagging Git Commit 🛠️"
        TAG="v${PACKAGE_VERSION}"
        git tag "$TAG"

        ;;

    "help")
        display_usage

        ;;

    *)
        echo -e "\e[1;31mUnknown command \"${1}\"\e[0m"
        display_usage
        exit 255

        ;;
esac

docker_autoclean