feat(docker): docker entrypoint with run/webserver capabilities

Add new `cmd.sh` script with case matches for subcommands.
This enables the docker contrainer to both serv a webserver and
run nvme-spex directly on files.

Signed-off-by: Morten B. Rasmussen <m.rasmussen@samsung.com>

Dockerfile

@@ -22,6 +22,8 @@ RUN pip install --upgrade pip
 
 
 COPY dist/*.tar.gz ${WORK_DIR}/dist/nvme_spex.tar.gz
+COPY scripts/cmd.sh .
 RUN pip install hypercorn dist/nvme_spex.tar.gz[spexsrv]
 
-CMD hypercorn --reload --bind 0.0.0.0:8000 spexsrv.application.app:app
+ENTRYPOINT [ "./cmd.sh" ]
+CMD ["webserver"]

scripts/cmd.sh

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+
+# SPDX-FileCopyrightText: 2023 Samsung Electronics Co., Ltd
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
+
+app_name=$(basename $0)
+
+sub_help(){
+    echo "Usage: $app_name <subcommand> [options]\n"
+    echo "Subcommands:"
+    echo "    webserver   Start webserver for linting NVMe specifications"
+    echo "    run         Run NVMe-Spex"
+    echo ""
+}
+
+
+subcommand="${1}"
+case $subcommand in
+    "" | "-h" | "--help")
+        sub_help
+        ;;
+    "run")
+        shift
+        echo "Running nvme-spex ${@}"
+        spex $@
+        exit 0
+        ;;
+    "webserver")
+        echo "Webserver starting"
+        hypercorn --reload --bind 0.0.0.0:8000 spexsrv.application.app:app
+        exit 0
+        ;;
+    *)
+        echo "Error: '$subcommand' is not a known subcommand." >&2
+        echo "       Run '$app_name --help' for a list of known subcommands." >&2
+        exit 1
+        ;;
+esac