fix: in WSL, make compose file accessible

We need to copy compose file in a docker host accessible
directory.

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

bin/compose

@@ -826,26 +826,6 @@ mk_docker_run_options() {
     )
     check_no_links_subdirs "$CHARM_STORE"/* || return 1
 
-    ## DEFAULT_COMPOSE_FILE
-    if [ "${DEFAULT_COMPOSE_FILE+x}" ]; then
-        DEFAULT_COMPOSE_FILE=$(realpath "$DEFAULT_COMPOSE_FILE")
-        dirname=$(dirname "$DEFAULT_COMPOSE_FILE")/
-        if [ -e "${DEFAULT_COMPOSE_FILE}" ]; then
-            docker_run_opts+=("-v" "$dirname:$dirname:ro")
-        fi
-    fi
-
-    ## COMPOSE_YML_FILE
-    if [ "${COMPOSE_YML_FILE+x}" ]; then
-        if [ -e "${COMPOSE_YML_FILE}" ]; then
-            docker_run_opts+=(
-                "-v" "$COMPOSE_YML_FILE:/tmp/compose.yml:ro"
-                "-e" "COMPOSE_YML_FILE=/tmp/compose.yml"
-                "-e" "HOST_COMPOSE_YML_FILE=/tmp/compose.yml"
-            )
-        fi
-    fi
-
     ## DATASTORE and CONFIGSTORE
     docker_run_opts+=(
 
@@ -897,7 +877,9 @@ mk_docker_run_options() {
         get_compose_file_opt "$COMPOSE_LAUNCHER_HASH" "$COMPOSE_LAUNCHER_BIN_OVERRIDE" \
         "$@") || return 1
 
-    if [ -z "$ARG_COMPOSE_FILE" ]; then
+    compose_file="${ARG_COMPOSE_FILE:-$COMPOSE_YML_FILE}"
+    if [ -z "$compose_file" ]; then
+
         ## Find a compose.yml in parents
         debug "No config file specified on command line arguments"
         debug "Looking for 'compose.yml' in self and parents.."
@@ -915,8 +897,11 @@ mk_docker_run_options() {
         else
             debug "  .. not found."
         fi
-    else
-        compose_file="$ARG_COMPOSE_FILE"
+    fi
+
+    if [ -z "$compose_file" ] && [ "${DEFAULT_COMPOSE_FILE+x}" ]; then
+        debug "Using \$DEFAULT_COMPOSE_FILE value '$DEFAULT_COMPOSE_FILE' as compose file."
+        compose_file="$DEFAULT_COMPOSE_FILE"
     fi
 
     if [ -n "$compose_file" ]; then
@@ -924,11 +909,23 @@ mk_docker_run_options() {
             die "Specified compose file '$compose_file' not found."
         fi
         compose_file="$(realpath "$compose_file")"
+        if [ "$OS" == "wsl" ]; then
+            ## Docker host is not same linux than WSL, so
+            ## access to root files are not the same.
+            ##YYYvlab, check on cp where is the base
+            dst="$COMPOSE_LAUNCHER_CACHE/compose.$(md5_compat < "$compose_file").yml"
+            cp "$compose_file" "$dst"
+            ## docker host start with /c/... whereas WSL could start with /mnt/c/...
+            local="$dst"
+        else
+            local="$compose_file"
+        fi
+
         parent_dir="${compose_file%/*}"
         docker_path=/var/lib/compose/root/${parent_dir##*/}/${compose_file##*/}
         docker_run_opts+=(
             "-e" "COMPOSE_YML_FILE=${compose_file##*/}"
-            "-v" "${compose_file}:${docker_path}:ro"
+            "-v" "${local}:${docker_path}:ro"
             "-w" "${docker_path%/*}"
         )
     else