Integration of ipfs-repo-migrations

The integration respect config's setting repoDisableAutoMigration that
defines if migrations should be automatically applied or not.

License: MIT
Signed-off-by: Adam Uhlir <uhlir.a@gmail.com>

package-list.json

@@ -18,6 +18,7 @@
 
     "Repo",
     ["ipfs/js-ipfs-repo", "ipfs-repo"],
+    ["AuHau/js-ipfs-repo-migrations", "ipfs-repo-migrations"],
 
     "Exchange",
     ["ipfs/js-ipfs-block-service", "ipfs-block-service"],

package.json

@@ -98,6 +98,7 @@
     "ipfs-mfs": "~0.11.4",
     "ipfs-multipart": "~0.1.0",
     "ipfs-repo": "~0.26.6",
+    "ipfs-repo-migrations": "AuHau/js-ipfs-repo-migrations#dev",
     "ipfs-unixfs": "~0.1.16",
     "ipfs-unixfs-exporter": "~0.37.6",
     "ipfs-unixfs-importer": "~0.39.9",

src/core/boot.js

@@ -27,6 +27,31 @@ module.exports = (self) => {
         cb(null, true)
       })
     },
+    // If migrations are enabled check & migrate repo
+    (repoOpened, cb) => {
+      // There is non-initialized repo => no migrations needed
+      if(!repoOpened){
+        return cb(null, repoOpened)
+      }
+
+      self.config.get('repoDisableAutoMigration')
+        .catch(err => {
+          if (!err.message.match('does not exist')) {
+            return Promise.reject(err)
+          }
+
+          // Option not found, but default value is false, lets continue
+          return false
+        })
+        .then(repoDisableAutoMigration => {
+          if (!repoDisableAutoMigration) {
+            self.log('checking for migrations')
+            return self.repo.migrate()
+          }
+        })
+        .then(() => cb(null, repoOpened))
+        .catch(cb)
+    },
     (repoOpened, cb) => {
       // Init with existing initialized, opened, repo
       if (repoOpened) {

src/core/components/repo.js

@@ -2,6 +2,8 @@
 
 const promisify = require('promisify-es6')
 const repoVersion = require('ipfs-repo').repoVersion
+const log = require('debug')('ipfs:repo')
+const migrator = require('ipfs-repo-migrations')
 
 module.exports = function repo (self) {
   return {
@@ -38,6 +40,25 @@ module.exports = function repo (self) {
       })
     }),
 
+    migrate: async function tryMigrateRepo () {
+      // Reads the repo version from datastore, not from the ipfs-repo package
+      const currentRepoVersion = await migrator.getCurrentRepoVersion(self._repo.path)
+
+      if (currentRepoVersion >= repoVersion) {
+        if (currentRepoVersion > repoVersion) {
+          log('Your repo\'s version is higher then this version of js-ipfs require! You should revert it.')
+        }
+
+        return // Nothing to migrate
+      }
+
+      if (repoVersion > migrator.getLatestMigrationVersion()) {
+        throw new Error('The ipfs-repo-migrations package does not have migration for version: ' + repoVersion)
+      }
+
+      return migrator.migrate(self._repo.path, repoVersion, true, self._repo.options)
+    },
+
     gc: promisify((options, callback) => {
       if (typeof options === 'function') {
         callback = options

src/core/config.js

@@ -27,6 +27,7 @@ const s = superstruct({
 const configSchema = s({
   repo: optional(s('object|string')),
   repoOwner: 'boolean?',
+  repoDisableAutoMigration: 'boolean?',
   preload: s({
     enabled: 'boolean?',
     addresses: optional(s(['multiaddr'])),