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author | nyatla <nyatla39@gmail.com> | 2018-04-10 16:14:28 +0800 |
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committer | nyatla <nyatla39@gmail.com> | 2018-04-10 16:14:28 +0800 |
commit | cc246528b509b80e560715f3b315acf0764e99e7 (patch) | |
tree | a04cc12e6c11345bf751726f15fa9d3dd6be4733 /app/scripts/lib/migrator/index.js | |
parent | bc0487006c623f1c81c186ba5b2a7137efb940ec (diff) | |
parent | b91bd818c7c2aec2952036a2f69ab05e0690a06e (diff) | |
download | tangerine-wallet-browser-cc246528b509b80e560715f3b315acf0764e99e7.tar.gz tangerine-wallet-browser-cc246528b509b80e560715f3b315acf0764e99e7.tar.zst tangerine-wallet-browser-cc246528b509b80e560715f3b315acf0764e99e7.zip |
Merge tag 'v4.5.5'
# Conflicts:
# app/_locales/ja/messages.json
# package-lock.json
messages.jsonのローカライズ
Diffstat (limited to 'app/scripts/lib/migrator/index.js')
-rw-r--r-- | app/scripts/lib/migrator/index.js | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/app/scripts/lib/migrator/index.js b/app/scripts/lib/migrator/index.js index 4fd2cae92..85c2717ea 100644 --- a/app/scripts/lib/migrator/index.js +++ b/app/scripts/lib/migrator/index.js @@ -1,6 +1,9 @@ -class Migrator { +const EventEmitter = require('events') + +class Migrator extends EventEmitter { constructor (opts = {}) { + super() const migrations = opts.migrations || [] // sort migrations by version this.migrations = migrations.sort((a, b) => a.version - b.version) @@ -12,13 +15,29 @@ class Migrator { // run all pending migrations on meta in place async migrateData (versionedData = this.generateInitialState()) { + // get all migrations that have not yet been run const pendingMigrations = this.migrations.filter(migrationIsPending) + // perform each migration for (const index in pendingMigrations) { const migration = pendingMigrations[index] - versionedData = await migration.migrate(versionedData) - if (!versionedData.data) throw new Error('Migrator - migration returned empty data') - if (versionedData.version !== undefined && versionedData.meta.version !== migration.version) throw new Error('Migrator - Migration did not update version number correctly') + try { + // attempt migration and validate + const migratedData = await migration.migrate(versionedData) + if (!migratedData.data) throw new Error('Migrator - migration returned empty data') + if (migratedData.version !== undefined && migratedData.meta.version !== migration.version) throw new Error('Migrator - Migration did not update version number correctly') + // accept the migration as good + versionedData = migratedData + } catch (err) { + // rewrite error message to add context without clobbering stack + const originalErrorMessage = err.message + err.message = `MetaMask Migration Error #${migration.version}: ${originalErrorMessage}` + console.warn(err.stack) + // emit error instead of throw so as to not break the run (gracefully fail) + this.emit('error', err) + // stop migrating and use state as is + return versionedData + } } return versionedData |