new: pkg: avoid spurious warnings from ``docker-compose run`` calls.

This helps charm direct actions to keep a tidy standard output, and allows
them to be used in scripts.

``docker-compose`` was updated to the latest version available (aka
``1.24.0``) and was patched to include what might have been forgotten
when implementing the ``COMPOSE_IGNORE_ORPHANS`` environment variable.

On ``compose`` side, we need to make sure to pass environment variables
that are to be used by ``docker-compose``.

PR: https://github.com/docker/compose/pull/7020
Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

Dockerfile

@@ -22,7 +22,7 @@ ENV KAL_SHLIB_ARRAY_VERSION="0.2.0" \
     KAL_SHLIB_PRETTY_VERSION="0.4.3"
 
 ARG DOCKER_CLI_VERSION="17.06.2-ce"
-ARG DOCKER_COMPOSE_VERSION="1.21.2"
+ARG DOCKER_COMPOSE_VERSION="1.24.0"
 
 ## install docker
 ENV DOCKER_DOWNLOAD_URL="https://download.docker.com/linux/static/stable/x86_64/docker-$DOCKER_CLI_VERSION.tgz"
@@ -58,7 +58,11 @@ RUN apk add yaml-dev cython cython-dev && \
 
 RUN pip install crudini
 
-RUN pip install docker-compose==$DOCKER_COMPOSE_VERSION
+RUN apk add libffi-dev openssl-dev && \
+    pip install pip==19.3.1 cffi==1.12.3 \
+    git+https://github.com/0k/compose@run_ignore_orphans
+    # docker-compose==$DOCKER_COMPOSE_VERSION
+    # pip install git+https://github.com/vaab/colour@master
 
 RUN curl -L https://git.0k.io/0k-charm.git/plain/bin/charm > /usr/local/bin/charm && \
     chmod +x /usr/local/bin/charm

bin/compose

@@ -35,6 +35,30 @@ read-0() {
 }
 
 
+read-0a() {
+    local eof= IFS=''
+    while [ "$1" ]; do
+        IFS='' read -r -d $'\n' -- "$1" || eof=1
+        shift
+    done
+    [ -z "$eof" ]
+}
+
+
+p0() {
+    printf "%s\0" "$@"
+}
+
+
+list_compose_vars() {
+    while read-0a def; do
+        def="${def##* }"
+        def="${def%=*}"
+        p0 "$def"
+    done < <(declare -p | grep "^declare -x COMPOSE_[A-Z_]\+=\"")
+}
+
+
 get_running_compose_containers() {
     ## XXXvlab: docker bug: there will be a final newline anyway
     docker ps --filter label="compose.service" --format='{{.ID}}'
@@ -188,6 +212,18 @@ mk_docker_run_options() {
     COMPOSE_LAUNCHER_BIN=$(readlink -f "${BASH_SOURCE[0]}")
     docker_run_opts+=("-v" "$COMPOSE_LAUNCHER_BIN:/usr/local/bin/compose")
 
+    while read-0 var; do
+        case "$var" in
+            COMPOSE_YML_FILE|COMPOSE_LAUNCHER_BIN|COMPOSE_DOCKER_IMAGE|\
+                COMPOSE_LAUNCHER_OPTS|COMPOSE_VAR|COMPOSE_CACHE)
+                :
+                ;;
+            *)
+                docker_run_opts+=("-e" "$var=${!var}")
+                ;;
+        esac
+    done < <(list_compose_vars)
+
     filename=$(mktemp -p /tmp/ -t launch_opts-XXXXXXXXXXXXXXXX)
     {
         printf "%s\0" "${docker_run_opts[@]}"