diff --git a/dk b/dk
index 8d1e22c..95fd031 100755
--- a/dk
+++ b/dk
@@ -45,14 +45,36 @@ COMMANDES
     prune
         Supprimer les containers et les images inutilisées
 
-OPTIONS
+OPTIONS générales
+    (ces options sont communes à toutes les commandes)
     -d, --chdir PROJDIR
     -p, --profile PROFILE
     -P, --prod
     -T, --test
     -n, --fake
     -j, --no-cache
-    -h, --host HOST"
+    -h, --host HOST
+
+OPTIONS build
+    (ces options ne sont valides que pour les commandes build, brd, bs)
+    -g, --ug, --no-update-apps
+        ne pas mettre à jour les dépôts dépendants. ces dépôts sont
+        définis dans le fichier update-apps.conf qui a le format
+        suivant:
+            DEFAULT_BRANCH=
+            APPS=()
+            app_URL=
+            app_DEST=
+            app_ORIGIN=
+            app_BRANCH=
+            app_TYPE=
+            app_AFTER_UPDATE=()
+    -u, --uu, --update-apps-only
+        Ne faire que la mise à jour depuis les dépôts dépendants.
+    --uo, --update-apps-origin ORIGIN
+        Spécifier l'origine par défaut pour update-apps
+    --ub, --update-apps-branch BRANCH
+        Spécifier la branche par défaut pour update-apps"
 }
 
 function get_version() {
@@ -187,6 +209,145 @@ function local_run() {
     runscript_as_root "$script" "$@"
 }
 
+BUILD_UPDATE_APPS=
+BUILD_BUILD=
+UPDATE_APPS_ORIGIN=
+UPDATE_APPS_BRANCH=
+function build_set_options() {
+    case "$1" in
+    u) BUILD_UPDATE_APPS=1; BUILD_BUILD=;;
+    b) BUILD_UPDATE_APPS=; BUILD_BUILD=1;;
+    *) BUILD_UPDATE_APPS=1; BUILD_BUILD=1;;
+    esac
+    UPDATE_APPS_ORIGIN="$2"
+    UPDATE_APPS_BRANCH="$3"
+}
+
+function update_apps_func_sqlmig() {
+    local destdir="$1" srcdir="$2"
+    [ -n "$destdir" ] || destdir=db
+    [ "${destdir%/config/mariadb/sqlmig}" != "$destdir" ] || destdir="$destdir/config/mariadb/sqlmig"
+
+    [ -n "$srcdir" ] || srcdir="$dest"
+    [ "${srcdir%/config/sqlmig}" != "$srcdir" ] || srcdir="$srcdir/config/sqlmig"
+
+    [ -d "$srcdir" ] || return 0
+
+    local -a sqlmigs; local sqlmig name
+    array_lsall sqlmigs "$srcdir"
+    mkdir -p "$destdir" || return 1
+    for sqlmig in "${sqlmigs[@]}"; do
+        if [ -d "$sqlmig" ]; then
+            setx name=basename -- "$sqlmig"
+            rsync -av --delete-after "$sqlmig/" "$destdir/$name"
+        else
+            rsync -av "$sqlmig" "$destdir"
+        fi
+    done
+    return 0
+}
+
+function build_update_apps() {
+    [ -n "$BUILD_UPDATE_APPS" ] || return 0
+    [ -f update-apps.conf ] || return 0
+
+    # charger le fichier de configuration
+    local DEFAULT_ORIGIN DEFAULT_BRANCH APPS
+    DEFAULT_ORIGIN="$UPDATE_APPS_ORIGIN"
+    [ -z "$DEFAULT_ORIGIN" ] && DEFAULT_ORIGIN=origin
+    DEFAULT_BRANCH="$UPDATE_APPS_BRANCH"
+    #XXX à terme, on déploiera la branche master en prod
+    [ -z "$DEFAULT_BRANCH" -a "$PROFILE" == prod ] && DEFAULT_BRANCH=develop #master
+    [ -z "$DEFAULT_BRANCH" ] && DEFAULT_BRANCH=develop
+    APPS=()
+    [ -f update-apps.conf ] && source ./update-apps.conf
+    [ ${#APPS[*]} -gt 0 ] || return 0
+
+    local PRODUCTION DEVELOPMENT
+    case "$PROFILE" in
+    prod) PRODUCTION=1; DEVELOPMENT=;;
+    test) PRODUCTION=1; DEVELOPMENT=1;;
+    devel) PRODUCTION=; DEVELOPMENT=;;
+    esac
+
+    etitle "Mise à jour des dépendances"
+    local app type url dest branch after_update after_updates
+    for app in "${APPS[@]}"; do
+        etitle "$app"
+        url="${app}_URL"; url="${!url}"
+        dest="${app}_DEST"; dest="${!dest}"
+        origin="${app}_ORIGIN"; origin="${!origin}"
+        branch="${app}_BRANCH"; branch="${!branch}"
+        type="${app}_TYPE"; type="${!type}"
+        after_updates="${app}_AFTER_UPDATE"
+        if is_defined "$after_updates"; then
+            after_updates="$after_updates[@]"; after_updates="${!after_updates}"
+        else
+            # script par défaut après update-apps
+            after_updates=(sqlmig)
+        fi
+
+        [ -n "$url" ] || {
+            ewarn "$app: vous devez définir l'url"
+            eend; return 1
+        }
+        [ -n "$dest" ] || dest="$app"
+        mkdir -p "$dest" || { eend; return 1; }
+        [ -n "$origin" ] || origin="$DEFAULT_ORIGIN"
+        [ -n "$branch" ] || branch="$DEFAULT_BRANCH"
+
+        dest="$dest/$app"
+        if [ ! -d "$dest" ]; then
+            # clonage initial
+            estep "Clonage $url:$branch --> $dest"
+            git clone -o "$origin" -b "$branch" "$url" "$dest" || { eend; return 1; }
+        else
+            # mise à jour
+            estep "Maj dépôt $url:$branch --> $dest"
+            setx cwd=pwd
+            cd "$dest"
+            git fetch --all -p -f || { eend; return 1; }
+            git reset --hard "$origin/$branch" || { eend; return 1; }
+            cd "$cwd"
+        fi
+
+        if [ -z "$type" ]; then
+            if [ -f "$dest/composer.json" ]; then
+                type=composer
+            else
+                type=inconnu
+            fi
+        fi
+        estep "Type de dépôt: $type"
+        if [ "$type" == composer ]; then
+            composer=/usr/bin/composer
+            [ -x "$dest/composer.phar" ] && composer="$dest/composer.phar"
+
+            estep "Installation des dépendances composer"
+            "$composer" -d"$dest" install ${PRODUCTION:+--no-dev -o} || { eend; return 1; }
+        fi
+
+        for after_update in "${after_updates[@]}"; do
+            if [ "${after_update#/}" != "$after_update" ]; then
+                # commande absolue, la lancer telle quelle
+                estep "$after_update"
+                eval "$after_update" || { eend; return 1; }
+            elif [ "${after_update#./}" != "$after_update" ]; then
+                # commande relative, la lancer telle quelle
+                estep "$after_update"
+                eval "$after_update" || { eend; return 1; }
+            else
+                # c'est une fonction update_apps_func_*
+                estep "$after_update"
+                eval "update_apps_func_$after_update" || { eend; return 1; }
+            fi
+        done
+
+        eend
+    done
+    eend
+}
+
 function initialize_build_env() {
     CTXDIR=.
     NAME=
@@ -218,8 +379,14 @@ function default_docker_build() {
         "${replace_build_args[@]}" "${build_args[@]}" \
         "$@" "$CTXDIR"
 }
-function compose_build() { default_compose_build "$@"; }
-function docker_build() { default_docker_build "$@"; }
+function compose_build() {
+    [ -n "$BUILD_BUILD" ] || return 0
+    default_compose_build "$@"
+}
+function docker_build() {
+    [ -n "$BUILD_BUILD" ] || return 0
+    default_docker_build "$@"
+}
 function auto_build() {
     local -a replace_env_args env_args
     local -a replace_build_args build_args
@@ -227,12 +394,14 @@ function auto_build() {
     if [ -f docker-compose.yml ]; then
         compose_set_env_args
         update_build_env
+        build_update_apps || return 1
         compose_build
     else
         docker_parse_env_args
         docker_check_name
         docker_add_build_arg build_date "$(date +%y%m%d)"
         update_build_env
+        build_update_apps || return 1
         docker_build
     fi
 }
@@ -517,6 +686,9 @@ chdir=
 FAKE=
 NO_CACHE=
 HOST=
+update_apps_mode=ub
+update_apps_origin=
+update_apps_branch=
 args=(
     --help '$exit_with display_help'
     -d:,--chdir: chdir=
@@ -526,6 +698,10 @@ args=(
     -n,--fake FAKE=1
     -j,--no-cache NO_CACHE=1
     -h:,--host: HOST=
+    -g,--ug,--no-update-apps update_apps_mode=b
+    -u,--uu,--update-apps-only update_apps_mode=u
+    --uo:,--update-apps-origin: update_apps_origin=
+    --ub:,--update-apps-branch: update_apps_branch=
 )
 parse_args "$@"; set -- "${args[@]}"
 
@@ -540,6 +716,7 @@ while [ $# -gt 0 ]; do
     cmd="$1"; shift
     case "$cmd" in
     b|build)
+        build_set_options "$update_apps_mode" "$update_apps_origin"  "$update_apps_branch"
         [ -f .build.scripts.sh ] && source ./.build.scripts.sh
         [ -f build.scripts.sh ] && source ./build.scripts.sh
         args=()
@@ -606,6 +783,7 @@ while [ $# -gt 0 ]; do
         }
         trap auto_down_trap 1 3 15 EXIT
 
+        build_set_options "$update_apps_mode" "$update_apps_origin"  "$update_apps_branch"
         [ -f .build.scripts.sh ] && source ./.build.scripts.sh
         [ -f build.scripts.sh ] && source ./build.scripts.sh
         args=()
@@ -620,6 +798,7 @@ while [ $# -gt 0 ]; do
         fi
         ;;
     bs)
+        build_set_options "$update_apps_mode" "$update_apps_origin"  "$update_apps_branch"
         [ -f .build.scripts.sh ] && source ./.build.scripts.sh
         [ -f build.scripts.sh ] && source ./build.scripts.sh
         args=()