[add] added docker

docker/files/entrypoint.sh

@@ -0,0 +1,125 @@
+#!/bin/sh
+
+##############################
+# configuration
+
+prefix_file="${API_PREFIX_FILE:-/app/data/api_prefix}"
+db_file="${RAILS_DB_PATH:-/app/data/rynDNS.sqlite3}"
+default_admin_file="${API_DEFAULT_KEY_FILE:-/app/data/api_default_admin}"
+rails_bin="${RAILS_BINARY:-/app/bin/rails}"
+demo_cycle="${RAILS_DEMO_RESET:-300s}"
+demo_prefix="zW3If4s5"
+seed_default_key_text="Created default admin with api_key" # for grep'ing the default admin key
+
+# end configuration
+##############################
+
+function log()
+{
+    local time=$(date +%F_%T)
+    local prefix="LOG"
+    case $1 in
+        ERR | ERROR)
+            prefix="ERR"
+            shift
+            ;;
+        WAR | WARNING)
+            prefix="WAR"
+            shift
+            ;;
+        INF | INFO)
+            prefix="INF"
+            shift
+            ;;
+    esac
+    local func=$1; shift
+    # remove any \n
+    #local text=$(echo "$@"| tr '\n' '#' | sed 's|#|\\n |g')
+    case "$logfile" in
+        "")
+            echo "[$time]:[$prefix]:[$0][$func]: $@" 2>&1
+            ;;
+        *)
+            echo "[$time]:[$prefix]:[$0][$func]: $@" >> $logfile
+            ;;
+    esac
+}
+
+function random_sting()
+{
+  echo -n "$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w "${1:-32}" | head -n 1)"
+}
+
+function get_prefix_file()
+{
+  if [ -f "$prefix_file" ]; then
+    echo -n "$(head -1 $prefix_file)"
+  else
+    new_prefix=$(random_sting 8)
+    log get_prefix_file no prefix file, generating new one
+    echo -n "$new_prefix" > "$prefix_file"
+    echo -n "$new_prefix"
+  fi
+}
+
+function set_api_prefix()
+{
+  if [ -z "$RAILS_API_KEY_PREFIX" ]; then
+    log set_api_prefix setting prefix from file
+    RAILS_API_KEY_PREFIX=$(get_prefix_file | tail -1)
+    export RAILS_API_KEY_PREFIX
+  else
+    log set_api_prefix saving prefix from ENV to file
+    echo -n "$RAILS_API_KEY_PREFIX" > "$prefix_file"
+  fi
+}
+
+function demo_cleaner()
+{
+    while true; do
+        log demo_cleaner cleaning up;
+        db_setup
+        # starting sleep in subshell to be able to quickly terminate
+        sleep $demo_cycle &
+        wait
+    done
+}
+
+function demo()
+{
+    if [ ! -z "$RAILS_API_DEMO" ]; then
+        log demo "setting prefix to $demo_prefix"
+        RAILS_API_KEY_PREFIX="$demo_prefix"
+        export RAILS_API_KEY_PREFIX
+        log demo "setting up demo cleaner, resetting every $demo_cycle"
+        demo_cleaner &
+    fi
+}
+
+function db_setup()
+{
+  if [ ! -f $db_file ]; then
+    log db_setup running first time migrations
+    echo "$($rails_bin db:migrate)"
+  fi
+  log db_setup seeding database
+  seed_log="$($rails_bin db:seed)"
+  echo "$seed_log"
+  # save default login to file
+  default_admin=$(echo "$seed_log" | grep "$seed_default_key_text")
+  [ "${#default_admin}" -gt 8 ] && echo -n "$default_admin"  > $default_admin_file
+  log db_setup "see \`docker exec \$CONTAINER cat $default_admin_file\` for initial admin api_key"
+}
+
+function main()
+{
+  set_api_prefix
+  log main prefix: $RAILS_API_KEY_PREFIX
+  db_setup
+  [ "$(id -u)" -eq 0 ] && log WARN main running server as root
+  demo
+  log main starting server
+  exec $rails_bin s
+}
+
+main "$@"