revert bash in inner script; add bootstrap for unbashed systems

epm-docker-test.sh

@@ -390,7 +390,7 @@ APP_NAME="$2"
 SOURCE_DIR="/work/eepm"
 
 run_eepm() {
-  ./bin/eepm "$@"
+  bash ./bin/eepm "$@"
 }
 
 os_id="unknown"
@@ -411,24 +411,37 @@ mkdir -p "$HOME"
 export PATH="$SOURCE_DIR/bin:$PATH"
 cd "$SOURCE_DIR"
 
-run_eepm update
-
 case "$os_id" in
   altlinux|alt)
     run_eepm --auto repo set etersoft
+    run_eepm update
     run_eepm --auto install wget glibc-pthread file
     ;;
   debian|ubuntu)
-    run_eepm --auto install bash wget ca-certificates coreutils file
+    run_eepm update
+    run_eepm --auto install wget ca-certificates coreutils file
+    ;;
+  alpine)
+    apk update
+    apk add --no-cache bash
+    run_eepm update
+    run_eepm --auto install wget file
+    ;;
+  void)
+    xbps-install -Syu
+    xbps-install -Sy bash
+    run_eepm update
+    run_eepm --auto install wget file
     ;;
   *)
+    run_eepm update
     run_eepm --auto install wget file bash
     ;;
 esac
 
 case "$TEST_COMMAND" in
   play)
-    exec ./bin/eepm play --auto "$APP_NAME"
+    exec bash ./bin/eepm play --auto "$APP_NAME"
     ;;
   *)
     printf '[container] unsupported test command: %s\n' "$TEST_COMMAND" >&2