build cli-migrations image on tagged deploys (close #534) (#953)

scripts/cli-migrations/.gitignore

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+cli-hasura-linux-amd64

scripts/cli-migrations/Dockerfile

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+FROM hasura/graphql-engine:v1.0.0-alpha27
+
+ENV HASURA_GRAPHQL_ENABLE_CONSOLE=true
+
+COPY docker-entrypoint.sh /bin/
+COPY cli-hasura-linux-amd64 /bin/hasura-cli
+RUN chmod +x /bin/hasura-cli
+
+ENTRYPOINT ["docker-entrypoint.sh"]
+
+CMD ["graphql-engine", "serve"]

scripts/cli-migrations/docker-entrypoint.sh

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+#!/bin/sh
+
+set -e
+
+DEFAULT_MIGRATIONS_DIR="/hasura-migrations"
+TEMP_MIGRATIONS_DIR="/tmp/hasura-migrations"
+
+# wait for a port to be ready
+wait_for_port() {
+    local PORT=$1
+    echo "waiting for $PORT"
+    for i in `seq 1 30`;
+    do
+        nc localhost $PORT > /dev/null 2>&1 && echo "port $PORT is ready" && return
+        echo -n .
+        sleep 1
+    done
+    echo "failed waiting for $PORT" && exit 1
+}
+
+echo "starting graphql engine on port 8080..."
+
+# start graphql engine
+graphql-engine serve &
+# store the pid to kill it later
+PID=$!
+
+# wait for port 8080 to be ready
+wait_for_port 8080
+
+# check if migration directory is set, default otherwise
+if [ -z ${HASURA_GRAPHQL_MIGRATIONS_DIR+x} ]; then
+    echo "env var HASURA_GRAPHQL_MIGRATIONS_DIR is not set"
+    echo "defaulting to $DEFAULT_MIGRATIONS_DIR"
+    HASURA_GRAPHQL_MIGRATIONS_DIR="$DEFAULT_MIGRATIONS_DIR"
+fi
+
+# apply migrations if the directory exist
+if [ -d "$HASURA_GRAPHQL_MIGRATIONS_DIR" ]; then
+    echo "applying migrations in $HASURA_GRAPHQL_MIGRATIONS_DIR..."
+    mkdir -p "$TEMP_MIGRATIONS_DIR"
+    cp -a "$HASURA_GRAPHQL_MIGRATIONS_DIR/." "$TEMP_MIGRATIONS_DIR/migrations/"
+    cd "$TEMP_MIGRATIONS_DIR"
+    echo "endpoint: http://localhost:8080" > config.yaml
+    hasura-cli migrate apply
+else
+    echo "directory $HASURA_GRAPHQL_MIGRATIONS_DIR does not exist"
+    echo "skipping migration apply"
+fi
+
+# kill graphql engine that we started earlier
+kill $PID
+
+# pass control to CMD
+exec "$@"