feat: entrypoint

deploy/docker/environment.sh

@@ -0,0 +1,52 @@
+source deploy/docker/logging.sh
+
+# usage: loadVariable VAR [DEFAULT]
+#    ie: file_env 'DB_PASSWORD' 'example'
+# (will allow for "$DB_PASSWORD_FILE" to fill in the value of
+#  "$DB_PASSWORD" from a file, especially for Docker's secrets feature)
+loadVariable() {
+  local variable="$1"
+  local variableFile="${variable}_FILE"
+  local default="${2:-}"
+  if [ "${!variable:-}" ] && [ "${!variableFile:-}" ]; then
+    logError "Both $variable and $variableFile are set (but are exclusive)"
+  fi
+  local value="$default"
+  if [ "${!variable:-}" ]; then
+    value="${!variable}"
+  elif [ "${!variableFile:-}" ]; then
+    value="$(<"${!variableFile}")"
+  fi
+  export "$variable"="$value"
+  unset "$variableFile"
+}
+
+# loads various settings
+setupEnvironment() {
+  loadVariable 'TIMEZONE' 'Etc/GMT'
+
+#  loadVariable 'MIGRATION_PATH' ''
+#  # initialize values that might be stored in a file
+#  loadVariable 'MYSQL_HOST'
+#  loadVariable 'MYSQL_DATABASE' 'defaultDatabase'
+#  loadVariable 'MYSQL_USER' 'defaultUser'
+#  loadVariable 'MYSQL_PASSWORD'
+
+  # initialize values that might be stored in a file
+  loadVariable 'TOKEN'
+  loadVariable 'OWNER' 'default owner'
+}
+
+# verify required environment.
+verifyEnvironment() {
+  if [ -z "$TOKEN" ]; then
+    logError $'Token is not completely filled\n\tYou need to specify $TOKEN'
+  fi
+#  if [ -z "$MYSQL_HOST" -o -z "$MYSQL_PASSWORD" ]; then
+#    logError $'MYSQL databases credentials is not completely filled\n\tYou need to specify $MYSQL_HOST, $MYSQL_PASSWORD'
+#  fi
+}
+
+setupEnvironment
+verifyEnvironment
+

deploy/docker/logging.sh

@@ -0,0 +1,31 @@
+# logging functions
+_log() {
+  local type="$1"
+  shift
+  printf '%s [%s] [entrypoint]: %s\n' "$(date -R)" "$type" "$*"
+}
+
+logNotice() {
+  _log NOTICE "$@"
+}
+logWarning() {
+  _log WARNING "$@" >&2
+}
+logError() {
+  _log ERROR "$@" >&2
+  exit 1
+}
+
+startWaiting() {
+  local type="NOTICE"
+  printf '%s [%s] [entrypoint]: %s' "$(date -R)" "$type" "$*"
+}
+
+waiting() {
+  sleep 1
+  printf '.'
+}
+
+finishWaiting() {
+  printf '\n'
+}

entrypoint.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+source deploy/docker/environment.sh
+source deploy/docker/logging.sh
+
+IS_STARTED='/tmp/is-started'
+if [ ! -e $IS_STARTED ]; then
+  logNotice 'Entrypoint script for golang-app started'
+
+#  logNotice 'Waiting to start MYSQL database...'
+#  while ! mysql --protocol=TCP --host="$MYSQL_HOST" --user="$MYSQL_USER" --password="$MYSQL_PASSWORD" --execute="show databases;" --silent 1>/dev/null; do
+#    sleep 1
+#  done
+#  logNotice 'Connected'
+
+#  if [ "$MIGRATION_PARAM" ]; then
+#    logNotice 'Apply golang-app database migrations from ' $MIGRATION_PARAM
+#    ./migrate -p $MIGRATION_PARAM up
+#  fi
+
+  touch $IS_STARTED
+  logNotice 'Project golang-app initialization complete. Ready for start up'
+fi
+
+exec "$@"