Add GraphQL service to SWH environment

Add swh-graphql to the Dockerfile with default configuration

.mrconfig

@@ -51,6 +51,10 @@ fixups =
   grep -q pre-commit.com .git/hooks/pre-commit || pre-commit install
   grep -q pre-commit.com .git/hooks/commit-msg || pre-commit install -t commit-msg
 
+[swh-graphql]
+checkout = git clone 'https://forge.softwareheritage.org/source/swh-graphql.git' 'swh-graphql'
+fixups = grep -q pre-commit.com .git/hooks/pre-commit || pre-commit install
+
 [swh-icinga-plugins]
 checkout = git clone 'https://forge.softwareheritage.org/source/swh-icinga-plugins.git' 'swh-icinga-plugins'
 fixups =

docker/Dockerfile

@@ -69,6 +69,7 @@ RUN pip install \
   swh-core[db,http] \
   swh-counters \
   swh-deposit[server] \
+  swh-graphql \
   swh-indexer \
   swh-journal \
   swh-lister \

docker/conf/graphql.yml

+storage:
+  cls: remote
+  url: http://swh-storage:5002
+
+debug: yes

docker/docker-compose.graphql.yml

+version: "2.1"
+
+services:
+  swh-graphql:
+    image: swh/stack
+    build: ./
+    depends_on:
+      - swh-storage
+    ports:
+      - 5013:5013
+    environment:
+      SWH_CONFIG_FILENAME: /graphql.yml
+    env_file:
+      - ./env/common_python.env
+    volumes:
+      - "./conf/graphql.yml:/graphql.yml:ro"
+      - "./services/swh-graphql/entrypoint.sh:/entrypoint.sh:ro"
+    entrypoint: /entrypoint.sh

docker/services/swh-graphql/entrypoint.sh

+#!/bin/bash
+
+set -e
+
+source /srv/softwareheritage/utils/pyutils.sh
+setup_pip
+
+case "$1" in
+    "shell")
+      exec bash -i
+      ;;
+    *)
+      echo Starting the swh-graphql API server
+
+      exec gunicorn --bind 0.0.0.0:5013 \
+           --reload \
+           --threads 4 \
+           --workers 2 \
+           --log-level DEBUG \
+           --timeout 3600 \
+           --config 'python:swh.core.api.gunicorn_config' \
+           'swh.graphql.server:make_app_from_configfile()'
+      ;;
+esac