fix: non-root user could not launch compose

We want to propagate user's current ssh config, and have specially
crafted vars for each os/users.

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

bin/compose

@@ -236,7 +236,7 @@ is_volume_used() {
 
 
 clean_unused_sessions() {
-    for f in "$COMPOSE_VAR/sessions/"*; do
+    for f in "$SESSION_DIR/"*; do
         [ -e "$f" ] || continue
         is_volume_used "$f" && continue
         rm -f "$f"
@@ -316,17 +316,28 @@ mk_docker_run_options() {
 
     case "$(get_os)" in
         linux)
-            if [ "$UID" == 0 ]; then
             COMPOSE_VAR=${COMPOSE_VAR:-/var/lib/compose}
             COMPOSE_CACHE=${COMPOSE_CACHE:-/var/cache/compose}
+            DATASTORE=${DATASTORE:-/srv/datastore/data}
+            CONFIGSTORE=${CONFIGSTORE:-/srv/datastore/config}
+            if [ "$UID" == 0 ]; then
+                SESSION_DIR=${SESSION_DIR:-"$COMPOSE_VAR"/sessions}
+                CHARM_STORE=${CHARM_STORE:-/srv/charm-store}
+                TZ_PATH=${TZ_PATH:-"$COMPOSE_VAR"/timezones}
             else
-                COMPOSE_VAR=${COMPOSE_VAR:-"$COMPOSE_LOCAL_ROOT"/lib}
-                COMPOSE_CACHE=${COMPOSE_CACHE:-"$COMPOSE_LOCAL_ROOT"/cache}
+                SESSION_DIR=${SESSION_DIR:-"$COMPOSE_LOCAL_ROOT"/sessions}
+                CHARM_STORE=${CHARM_STORE:-"$HOME"/.charm-store}
+                TZ_PATH=${TZ_PATH:-"$COMPOSE_LOCAL_ROOT"/timezones}
             fi
             ;;
         mac)
             COMPOSE_VAR=${COMPOSE_VAR:-"$COMPOSE_LOCAL_ROOT"/lib}
             COMPOSE_CACHE=${COMPOSE_CACHE:-"$COMPOSE_LOCAL_ROOT"/cache}
+            SESSION_DIR=${SESSION_DIR:-"$COMPOSE_LOCAL_ROOT"/sessions}
+            DATASTORE=${DATASTORE:-"$COMPOSE_LOCAL_ROOT"/data}
+            CONFIGSTORE=${CONFIGSTORE:-"$COMPOSE_LOCAL_ROOT"/config}
+            CHARM_STORE=${CHARM_STORE:-"$HOME"/.charm-store}
+            TZ_PATH=${TZ_PATH:-"$COMPOSE_LOCAL_ROOT"/timezones}
             ;;
         *)
             echo "System '$os' not supported yet." >&2
@@ -337,8 +348,8 @@ mk_docker_run_options() {
 
     ## get TZ value and prepare TZ_PATH
     TZ=$(get_tz) || exit 1
-    mkdir -p "${COMPOSE_VAR}/timezones"
-    TZ_PATH="${COMPOSE_VAR}/timezones/$(e "$TZ" | sha256sum | cut -c 1-8)" || exit 1
+    mkdir -p "${TZ_PATH}"
+    TZ_PATH="${TZ_PATH}/$(e "$TZ" | sha256sum | cut -c 1-8)" || exit 1
     [ -e "$TZ_PATH" ] || e "$TZ" > "$TZ_PATH"
 
     ## CACHE/DATA DIRS
@@ -352,16 +363,17 @@ mk_docker_run_options() {
     ##
 
     ## CHARM_STORE
-    CHARM_STORE=${CHARM_STORE:-/srv/charm-store}
+    [ -e "$CHARM_STORE" ] || mkdir -p "$CHARM_STORE" || exit 1
     [ -L "$CHARM_STORE" ] && {
         CHARM_STORE=$(readlink -f "$CHARM_STORE") || exit 1
     }
+
     docker_run_opts+=(
         "-v" "$CHARM_STORE:/srv/charm-store:ro"
         "-e" "CHARM_STORE=/srv/charm-store"
         "-e" "HOST_CHARM_STORE=$CHARM_STORE"
     )
-    relink_subdirs /srv/charm-store/*
+    relink_subdirs "$CHARM_STORE"/*
 
     ## DEFAULT_COMPOSE_FILE
     if [ "${DEFAULT_COMPOSE_FILE+x}" ]; then
@@ -383,17 +395,13 @@ mk_docker_run_options() {
         fi
     fi
 
-    ## DATASTORE
-    DATASTORE=${DATASTORE:-/srv/datastore/data}
+    ## DATASTORE and CONFIGSTORE
     docker_run_opts+=(
+
         "-v" "$DATASTORE:/srv/datastore/data:rw"
         "-e" "DATASTORE=/srv/datastore/data"
         "-e" "HOST_DATASTORE=$DATASTORE"
-    )
 
-    ## CONFIGSTORE
-    CONFIGSTORE=${CONFIGSTORE:-/srv/datastore/config}
-    docker_run_opts+=(
         "-v" "$CONFIGSTORE:/srv/datastore/config:rw"
         "-e" "CONFIGSTORE=/srv/datastore/config"
         "-e" "HOST_CONFIGSTORE=$CONFIGSTORE"
@@ -406,8 +414,8 @@ mk_docker_run_options() {
 
     ## SSH config
     docker_run_opts+=(
-        "-v" "/root/.ssh:/root/.ssh:ro"
-        "-v" "/etc/ssh:/etc/ssh"
+        "-v" "$HOME/.ssh:/root/.ssh:ro"
+        "-v" "/etc/ssh:/etc/ssh:ro"
     )
 
     COMPOSE_LAUNCHER_BIN=$(readlink -f "${BASH_SOURCE[0]}")
@@ -431,15 +439,16 @@ mk_docker_run_options() {
     } > "$filename"
     sha=$(sha256sum "$filename")
     sha=${sha:0:64}
-    dest="$COMPOSE_VAR/sessions/$sha"
+    src="$SESSION_DIR/$UID-$sha"
+    dest="/var/lib/compose/sessions/$UID-$sha"
     {
-        p0 "-v" "$dest:$dest"
+        p0 "-v" "$SESSION_DIR/$UID-$sha:$dest:ro"
         p0 "-e" "COMPOSE_LAUNCHER_OPTS=$dest"
         p0 "-e" "COMPOSE_LAUNCHER_BIN=$COMPOSE_LAUNCHER_BIN"
     } >> "$filename"
-    mkdir -p "$COMPOSE_VAR"/sessions
-    mv "$filename" "$dest"
-    echo "$dest"
+    mkdir -p "$SESSION_DIR" || return 1
+    mv -f "$filename" "$SESSION_DIR/$UID-$sha" || return 1
+    echo "$SESSION_DIR/$UID-$sha"
 }