Save migrations file on db (#215)

* Revert "Migration sql changes (#199)"

This reverts commit 12c834469c.

* Save migrate file on db

* Add message on migration error in lamassu-update

bin/lamassu-migrate

@@ -1,8 +1,34 @@
 #!/usr/bin/env node
+const FileStore = require('migrate/lib/file-store')
 
+const db = require('../lib/db')
 const migrate = require('../lib/migrate')
+const options = require('../lib/options')
 
-migrate.run()
+const createMigration = `CREATE TABLE IF NOT EXISTS migrations (
+  id serial PRIMARY KEY,
+  data json NOT NULL
+)`
+
+const select = 'select * from migrations limit 1'
+
+const getMigrateFile = () => {
+  return new Promise((resolve, reject) => {
+    new FileStore(options.migrateStatePath).load((err, store) => {
+      if (err) return reject(err)
+      return resolve(store)
+    })
+  })
+}
+
+db.none(createMigration)
+  .then(() => Promise.all([db.oneOrNone(select), getMigrateFile()]))
+  .then(([qResult, migrateFile]) => {
+    if (!qResult && migrateFile) {
+      return db.none('insert into migrations (id, data) values (1, $1)', [migrateFile])
+    }
+  })
+  .then(() => migrate.run())
   .then(() => {
     console.log('DB Migration succeeded.')
     process.exit(0)

bin/lamassu-update

@@ -28,6 +28,13 @@ if [ "$(whoami)" != "root" ]; then
   exit 3
 fi
 
+# Use a lock file so failed scripts cannot be imediately retried
+# If not the backup created on this script would be replaced
+if ! mkdir /var/lock/lamassu-update; then
+  echo "Script is locked because of a failure." >&2
+  exit 1
+fi
+
 decho "stopping lamassu-server"
 supervisorctl stop lamassu-server >> ${LOG_FILE} 2>&1
 supervisorctl stop lamassu-admin-server >> ${LOG_FILE} 2>&1
@@ -53,8 +60,11 @@ decho "rebuilding npm deps"
 cd $(npm root -g)/lamassu-server/ >> ${LOG_FILE} 2>&1
 npm rebuild >> ${LOG_FILE} 2>&1
 
+{
 decho "running migration"
-lamassu-migrate >> ${LOG_FILE} 2>&1
+  lamassu-migrate >> ${LOG_FILE} 2>&1
+} || { echo "Failure running migrations" ; exit 1 ; }
+
 lamassu-migrate-config >> ${LOG_FILE} 2>&1
 
 decho "update to mnemonic"
@@ -88,4 +98,6 @@ set -e
 # reset terminal to link new executables
 hash -r
 
+rm -r /var/lock/lamassu-update
+
 decho "Update complete!"