nulib/support/rundk

#!/bin/bash
# -*- coding: utf-8 mode: sh -*- vim:sw=4:sts=4:et:ai:si:sta:fenc=utf-8
# Script permettant de lancer une commande dans docker et/ou de bootstrapper
# l'utilisation de nulib dans un projet
# Les fichiers suivants doivent être copiés à un endroit quelconque du projet:
# - rundk  (ce script)
# - Dockerfile.rundk
# Les fichiers suivants peuvent être intégrés dans le projet comme exemples:
# - dot-build.env.dist
# - dot-dkbuild.env.dist
# Par défaut, ce script assume que bootstrap est copié dans le répertoire sbin/
# du projet, et que le fichier composer.json et le répertoire vendor/ sont à la
# racine du projet. Le cas échéant, modifier les valeurs ci-dessous
MYDIR="$(cd "$(dirname -- "$0")"; pwd)"
MYNAME="$(basename -- "$0")"

################################################################################
# Modifier les valeurs suivantes si nécessaire

# répertoire du projet. ce chemin doit être absolu
PROJDIR=

# composer: répertoire du projet composer (celui qui contient le fichier
# composer.json), chemin de composer.phar et répertoire vendor. ces chemions
# doivent être relatifs à $PROJDIR
COMPOSERDIR=
COMPOSERPHAR=
VENDORDIR=

# fichier de configuration pour le build
BUILDENV0=
BUILDENV=

# version de debian à utiliser pour l'image
# d12=php8.2, d11=php7.4, d10=php7.3
DIST=

# Nom de base de l'image (sans le registry)
IMAGENAME=

################################################################################
# Ne pas modifier à partir d'ici

[ -n "$PROJDIR" ] || PROJDIR="$(dirname -- "$MYDIR")"
[ -n "$COMPOSERDIR" ] || COMPOSERDIR=.
[ -n "$COMPOSERPHAR" ] || COMPOSERPHAR=sbin/composer.phar
[ -n "$VENDORDIR" ] || VENDORDIR=vendor
[ -n "$BUILDENV0" ] || BUILDENV0=.build.env.dist
[ -n "$BUILDENV" ] || BUILDENV=build.env
[ -n "$DIST" ] || DIST=d12
[ -n "$IMAGENAME" ] || IMAGENAME=nulib/rundk

[ "$COMPOSERPHAR" == none ] && COMPOSERPHAR=
[ "$BUILDENV0" == none ] && BUILDENV0=
[ "$BUILDENV" == none ] && BUILDENV=

function eecho() { echo "$*" 1>&2; }
function eerror() { eecho "ERROR: $*"; }
function die() { [ $# -gt 0 ] && eerror "$*"; exit 1; }
function is_defined() { [ -n "$(declare -p "$1" 2>/dev/null)" ]; }
function in_path() { [ -n "$1" -a -x "$(which "$1" 2>/dev/null)" ]; }
function composer() {
    cd "$PROJDIR/$COMPOSERDIR" || exit 1
    if [ -x "$PROJDIR/$COMPOSERPHAR" ]; then
        "$PROJDIR/$COMPOSERPHAR" "$@"
    elif in_path composer; then
        command composer "$@"
    elif [ -x /usr/bin/composer ]; then
        /usr/bin/composer "$@"
    elif [ -x /usr/local/bin/composer ]; then
        /usr/local/bin/composer "$@"
    else
        die "impossible de trouver composer"
    fi
    if [ -f composer.lock ]; then
        cp composer.lock "$PROJDIR/.composer.lock.rundk"
    fi
}

bootstrap=
BootstrapOnly=1
ComposerInstall=
ForcedBootstrap=
parse_opts=1
args=()
for arg in "$@"; do
    if [ -z "$parse_opts" ]; then
        args+=("$arg")
    elif [ "$arg" == --bootstrap -o "$arg" == --bs ]; then
        bootstrap=1
    elif [ "$arg" == --exec ]; then
        BootstrapOnly=
    elif [ "$arg" == --composer-install -o "$arg" == --ci ]; then
        ComposerInstall=1
    elif [[ "$arg" == -* ]]; then
        args+=("$arg")
    else
        args+=("$arg")
        parse_opts=
    fi
done
set -- "${args[@]}"

if [ -z "$bootstrap" ]; then
    # si vendor/ n'existe pas, alors on doit faire bootstrap
    if [ ! -f "$PROJDIR/$VENDORDIR/nulib/php/load.sh" ]; then
        ForcedBootstrap=1
    elif [ ! -f "$PROJDIR/.composer.lock.rundk" ]; then
        ForcedBootstrap=1
    elif ! diff -q "$PROJDIR/$COMPOSERDIR/composer.lock" "$PROJDIR/.composer.lock.rundk" >&/dev/null; then
        ForcedBootstrap=1
    elif [ -n "$bootstrap" -a -n "$BootstrapOnly" ]; then
        # bootstrap inutile
        exit 0
    fi

    if [ -n "$ForcedBootstrap" ]; then
        [ -z "$_RUNDK_IN_DOCKER" ] && eecho "== bootstrap rundk is needed"
        bootstrap=1
        BootstrapOnly=
    fi
fi

if [ -z "$_RUNDK_IN_DOCKER" ]; then
    ############################################################################
    # Lancement depuis l'extérieur du container

    # recenser les valeur de proxy
    declare -A PROXY_VARS
    for var in {HTTPS,ALL,NO}_PROXY {http,https,all,no}_proxy; do
        is_defined "$var" && PROXY_VARS[${var,,}]="${!var}"
    done

    ## Charger ~/.dkbuild.env

    APT_PROXY=
    APT_MIRROR=
    SEC_MIRROR=
    TIMEZONE=
    PRIVAREG=
    REGISTRY=
    PROFILE=
    HOST_MAPPINGS=()
    function default_profile() {
        PROFILE="$1"
    }
    function profile() {
        local profile
        for profile in "$@"; do
            [ "$profile" == "$PROFILE" ] && return 0
        done
        return 1
    }
    function setenv() {
        eval "export $1"
    }
    function default() {
        local command="$1"; shift
        local nv n v
        case "$command" in
        docker)
            for nv in "$@"; do
                [[ "$nv" == *=* ]] || continue
                n="${nv%%=*}"
                v="${nv#*=}"
                case "$n" in
                host-mappings)
                    read -a ns <<<"$v"
                    for v in "${ns[@]}"; do
                        HOST_MAPPINGS+=("$v")
                    done
                    ;;
                esac
            done
            ;;
        esac
    }
    [ -f ~/.dkbuild.env ] && source ~/.dkbuild.env

    [ -n "$APT_PROXY" ] || APT_PROXY=
    [ -n "$APT_MIRROR" ] || APT_MIRROR=default
    [ -n "$SEC_MIRROR" ] || SEC_MIRROR=default
    [ -n "$TIMEZONE" ] || TIMEZONE=Europe/Paris
    [ -n "$PRIVAREG" ] || PRIVAREG=
    [ -n "$REGISTRY" ] || REGISTRY=pubdocker.univ-reunion.fr

    ## Construire l'image

    if [ -n "$RUNDK_NO_USE_RSLAVE" ]; then
        UseRslave=
    elif [ -n "$RUNDK_USE_RSLAVE" ]; then
        UseRslave=1
    elif [ -e /proc/sys/fs/binfmt_misc/WSLInterop ]; then
        # pas de mount propagation sous WSL
        UseRslave=
    else
        UseRslave=1
    fi

    IMAGE=
    if [ -z "$bootstrap" ]; then
        if [ -n "$BUILDENV" -a -f "$PROJDIR/$BUILDENV" ]; then
            source "$PROJDIR/$BUILDENV" || exit 1
        elif [ -n "$BUILDENV0" -a -f "$PROJDIR/$BUILDENV0" ]; then
            source "$PROJDIR/$BUILDENV0" || exit 1
        fi
        if [ -z "$IMAGE" ]; then
            [ -n "$PRIVAREG" ] && IMAGE="$PRIVAREG/$IMAGENAME:$DIST" || IMAGE="$REGISTRY/$IMAGENAME:$DIST"
        fi
        if [ -z "$(docker image ls --no-trunc --format '{{.Repository}}:{{.Tag}}' "$IMAGE" 2>/dev/null)" ]; then
            bootstrap=1
        fi
    fi

    if [ -n "$bootstrap" ]; then
        BUILD_ARGS=(
            REGISTRY
            APT_PROXY
            APT_MIRROR
            SEC_MIRROR
            TIMEZONE
        )

        SOPTS=+d:9876543210:c:UjDx:z:r:pw:v
        LOPTS=help,dist:,d19,d18,d17,d16,d15,d14,d13,d12,d11,d10,config:,ue,unless-exists,pull,nc,no-cache,po,plain-output,apt-proxy:,timezone:,privareg:,push,chdir:,verbose,no-use-rslave
        args="$(getopt -n "$MYNAME" -o "$SOPTS" -l "$LOPTS" -- "$@")" || exit 1; eval "set -- $args"

        Dist=
        if [ -n "$BUILDENV" -a -f "$PROJDIR/$BUILDENV" ]; then
            Config="$PROJDIR/$BUILDENV"
        elif [ -n "$BUILDENV0" -a -f "$PROJDIR/$BUILDENV0" ]; then
            Config="$PROJDIR/$BUILDENV0"
        else
            Config=
        fi
        UnlessExists=
        Pull=
        NoCache=
        PlainOutput=
        Chdir=
        Verbose=
        while [ $# -gt 0 ]; do
            case "$1" in
            --) shift; break;;
            --help)
                eecho "\
rundk: construire l'image docker

USAGE
    $MYNAME --bootstrap [options...] [--exec command [args...]]

OPTIONS
    -c, --config build.env
    --unless-exists
    -U, --pull
    -j, --no-cache
    -D, --plain-output
    -x, --apt-proxy APT_PROXY
    -z, --timezone TIMEZONE
    -r, --privareg PRIVAREG
    -p, --push
        paramètres pour la consruction de l'image
    -w, --chdir CHDIR
        aller dans le répertoire spécifié avant de lancer la commande
    -v, --verbose
        afficher plus d'informations"
                exit 0
                ;;
            -d|--dist) shift; Dist="$1";;
            -[0-9]) Dist="d1${1#-}";;
            --d*) Dist="${1#--}";;
            -c|--config) shift; Config="$1";;
            --ue|--unless-exists) UnlessExists=1;;
            -U|--pull) Pull=1;;
            -j|--nc|--no-cache) NoCache=1;;
            -D|--po|--plain-output) PlainOutput=1;;
            -x|--apt-proxy) shift; APT_PROXY="$1";;
            -z|--timezone) shift; TIMEZONE="$1";;
            -r|--privareg) shift; PRIVAREG="$1";;
            -p|--push) Push=1;;
            -w|--chdir) shift; Chdir="$1";;
            -v|--verbose) Verbose=1;;
            --no-use-rslave) UseRslave=;;
            *) die "$1: option non configurée";;
            esac
            shift
        done

        [ "$Config" == none ] && Config=
        if [ -n "$Config" ]; then
            source "$Config" || exit 1
        fi
        [ -n "$Dist" ] && DIST="$Dist"
        if [ -z "$IMAGE" ]; then
            [ -n "$PRIVAREG" ] && IMAGE="$PRIVAREG/$IMAGENAME:$DIST" || IMAGE="$REGISTRY/$IMAGENAME:$DIST"
        fi
        if [ -z "$UnlessExists" -o -z "$(docker image ls --no-trunc --format '{{.Repository}}:{{.Tag}}' "$IMAGE" 2>/dev/null)" ]; then
            eecho "== Building $IMAGE"
            args=(
                -f "$MYDIR/Dockerfile.rundk"
                ${Pull:+--pull}
                ${NoCache:+--no-cache}
                ${BuildPlain:+--progress plain}
                -t "$IMAGE"
                --build-arg "NDIST=${DIST#d}"
            )
            for arg in "${BUILD_ARGS[@]}"; do
                args+=(--build-arg "$arg=${!arg}")
            done
            for arg in "${!PROXY_VARS[@]}"; do
                args+=(--build-arg "$arg=${PROXY_VARS[$arg]}")
            done
            for host in "${HOST_MAPPINGS[@]}"; do
                args+=(--add-host "$host")
            done
            mkdir -p /tmp/rundk-build
            docker build "${args[@]}" /tmp/rundk-build || exit 1

            if [ -n "$Push" -a -n "$PRIVAREG" ]; then
                eecho "== Pushing $IMAGE"
                docker push "$IMAGE" || exit 1
            fi
        fi
        if [ -n "$ComposerInstall" -a ! -f "$PROJDIR/$VENDORDIR/nulib/php/load.sh" ]; then
            BootstrapOnly=
            ForcedBootstrap=1
        fi
        [ -n "$BootstrapOnly" ] && exit 0

    else
        SOPTS=+w:v
        LOPTS=help,chdir:,verbose,no-use-rslave
        args="$(getopt -n "$MYNAME" -o "$SOPTS" -l "$LOPTS" -- "$@")" || exit 1; eval "set -- $args"

        Chdir=
        Verbose=
        while [ $# -gt 0 ]; do
            case "$1" in
            --) shift; break;;
            --help)
                eecho "\
rundk: construire l'image docker

USAGE
    $MYNAME ci|cu|composer
    $MYNAME --exec [options...] command [args...]

COMMANDES COMPOSER
    ci
    cu
        installer/mettre à jour les dépendances du projet avec composer
    composer (args...]
        lancer composer avec les arguments spécifiés.

pour les commandes ci-dessus, l'option --chdir est ignorée: le répertoire
courant est forcé au répertoire du projet composer

OPTIONS
    -w, --chdir CHDIR
        aller dans le répertoire spécifié avant de lancer la commande
    -v, --verbose
        afficher plus d'informations"
                exit 0
                ;;
            -w|--chdir) shift; Chdir="$1";;
            -v|--verbose) Verbose=1;;
            --no-use-rslave) UseRslave=;;
            *) die "$1: option non configurée";;
            esac
            shift
        done

        if [ -n "$ComposerInstall" -a ! -f "$PROJDIR/$VENDORDIR/nulib/php/load.sh" ]; then
            ForcedBootstrap=1
        fi
    fi

    ## Lancer la commande

    uid="$(id -u)"
    gid="$(id -g)"
    args=(
        run -it --rm
        --name "rundk-$(basename -- "$1")-$$"
        -e _RUNDK_IN_DOCKER=1
        -e _RUNDK_UID="$uid"
        -e _RUNDK_GID="$gid"
    )
    for arg in "${!PROXY_VARS[@]}"; do
        args+=(--e "$arg=${PROXY_VARS[$arg]}")
    done
    for host in "${HOST_MAPPINGS[@]}"; do
        args+=(--add-host "$host")
    done

    # monter le répertoire qui contient $PROJDIR
    mount_composer=
    if [ "${PROJDIR#$HOME/}" != "$PROJDIR" -o "$PROJDIR" == "$HOME" ]; then
        # bind mount $HOME
        args+=(-v "$HOME:$HOME${UseRslave:+:rslave}")
    else
        # bind mount uniquement le répertoire du projet
        args+=(-v "$PROJDIR:$PROJDIR${UseRslave:+:rslave}")
        mount_composer=1
    fi
    if [ -n "$mount_composer" -a -d "$HOME/.composer" ]; then
        # monter la configuration de composer
        args+=(-v "$HOME/.composer:$HOME/.composer")
    fi
    args+=(-w "$(pwd)")

    # lancer avec l'utilisateur courant
    if [ $uid -ne 0 ]; then
        # si c'est un utilisateur lambda, il faut monter les informations
        # nécessaires. composer est déjà monté via $HOME
        user="$(id -un)"
        userent="$(getent passwd "$user")"
        group="$(id -gn)"
        groupent="$(getent group "$group")"
        args+=(
            -e _RUNDK_USER="$user"
            -e _RUNDK_USERENT="$userent"
            -e _RUNDK_GROUPENT="$groupent"
        )
    fi

    args+=(
        "$IMAGE"
        exec "$0" ${Chdir:+-w "$Chdir"}
    )
    [ -n "$ForcedBootstrap" ] && set -- ci
    [ -n "$Verbose" ] && eecho "\$ docker ${args[*]} $*"
    exec docker "${args[@]}" "$@"

else
    ############################################################################
    # Lancement depuis l'intérieur du container

    # Ajouter les informations utilisateur le cas échéant
    if [ -n "$_RUNDK_USERENT" ]; then
        grep -q "^$_RUNDK_USER:" /etc/passwd || echo "$_RUNDK_USERENT" >>/etc/passwd
    fi
    if [ -n "$_RUNDK_GROUPENT" ]; then
        grep -q "^$_RUNDK_GROUP:" /etc/group || echo "$_RUNDK_GROUPENT" >>/etc/group
    fi
    if [ -n "$_RUNDK_USER" ]; then
        user="$_RUNDK_USER"
        export _RUNDK_USER=
        export _RUNDK_USERENT=
        export _RUNDK_GROUPENT=
        if in_path su-exec; then
            exec su-exec "$user" "$0" "$@"
        else
            exec runuser -u "$user" -- "$0" "$@"
        fi
    fi

    SOPTS=+w:
    LOPTS=chdir:
    args="$(getopt -n "$MYNAME" -o "$SOPTS" -l "$LOPTS" -- "$@")" || exit 1; eval "set -- $args"

    chdir=
    action=
    while [ $# -gt 0 ]; do
        case "$1" in
        --) shift; break;;
        -w|--chdir) shift; chdir="$1";;
        *) die "$1: option non configurée";;
        esac
        shift
    done

    if [ "$1" == ci ]; then
        eecho "== installing composer dependencies"
        composer i
    elif [ "$1" == cu ]; then
        eecho "== upgrading composer dependencies"
        composer u
    elif [ "$1" == composer ]; then
        "$@"
    else
        if [ -n "$chdir" ]; then
            cd "$chdir" || exit 1
        fi
        exec "${@:-bash}"
    fi
fi