[Meta] Support for D7 -> D9 contrib migrate

We need this to be a community effort, spanning as it does multiple modules from many sources, so it seems appropriate to raise it in the context of community initiatives.

Migration support is available in #migration on Drupal slack.

Contrib related

- bbcode →
- easy_meta → => ✨ Migrations: Easy Meta Active
- entity_embed → => #2821205: Support migrating embedded media tags from Drupal 7 media module →
- feeds → => #3008991: Migrate feeds content from Drupal 7 →
- field_collection → / paragraphs → => #2897021: [META] Migrate support for importing field collections as paragraphs →
- field_group → => D7, yes. D6, in progress: #2704733: Add d7 field_group migration → #2611904: Add migrate support for D6 fieldgroup →
- fieldable_panels_panes → => #3153099: Plan for Fieldable Panels Panes 1.0.0 →
- honeypot → => #2401647: Integrate D8 Migrate API so Honeypot config is upgraded from D6/D7 →
- imce → => 📌 Upgrade (migrate) data from Drupal 7 → Drupal 8/9 Active
- linkit → => #2953047: [META] Upgrade (migrate) data from Drupal 7 => Drupal 8 →
- media_entity → => #2772129: Scald Atom migrate source → #2242783: Create default migration templates →
- metatag → => , 📌 Migrations: Metatag-D7 default configurations Fixed , ✨ Migrating translated Drupal 7 Metatag data to Drupal 8 Needs work and 📌 Migrations: Metatag-D7 per-path configurations Active (not done)
- metatags_quick → => ✨ Migrations: Metatags Quick 2 per-entity values Active , ✨ Migrations: Metatags Quick 2 configuration Active and ✨ Migrations: Metatags Quick 2 path-based values Active
- page_title → => 📌 Migrations: Page Title entity data (D7) Active and 📌 Migrations: Page Title configuration (D7) Active
- paragraphs → => #2897021: [META] Migrate support for importing field collections as paragraphs →
- pathauto → => D7: Included in Pathauto 8.x-1.4 → ; D6: #3045639: Migrate Pathauto configuration from Drupal 6 → .
- typogrify →
- uuid → #2953003: Upgrade (migrate) data from Drupal 7 => Drupal 8 →
- workbench_moderation → 📌 D7 WBM upgrade path Active
- workflow → => #2966872: Add Migrate support from contrib Workflow to core Content Moderation+Workflows →
- xbbcode →
- xmlsitemap → => #2306099: Provide upgrade path from 6.x and 7.x →

Closed/Fixed/Won't Fix

• addressfield → => #2912087: Field plugin migration from D7/addressfield →
• backup_migrate → => #2953042: Upgrade (migrate) data from Drupal 7 => Drupal 8 →
• book => Already in core.
• captcha → => #2036925: Migrate captcha settings from d7 to d8 →
• colorbox → => #2953048: Upgrade (migrate) data from Drupal 7 => Drupal 8 →
• ctools → => Not applicable, API module only. No data to migrate.
• entity → Not applicable
• eck → => ✨ Add migrations for Drupal 7 ECK to Drupal 8/9 Fixed
• entityreference => Already in core.
• google_analytics → => #2531648: Migrate 'pages' and 'roles' settings to D8 →
• inline_entity_form → => #2953036: Upgrade (migrate) data from Drupal 7 => Drupal 8 →
• name → => #2843684: Migration integration → D7 ok, D6 n/a
• nodequeue → (=> entityqueue) →
• node_reference (migrate to entityreference)
• phone → => Already in core.

- profile/profile2 → ✨ Migrate data from Profile2 Needs work
- poll → 📌 Poll migrate support Fixed

• references → ⇒ #2814953: Migrate Drupal 7 node/user reference fields →
• redirect → => #2715807: Migrate D7 redirects to D8 →
• search_api → => #2044139: Write D7->D8 migration code →
• statistics => Already in core.
• token → => Not applicable, API module only. No data to migrate.
• video_embed_field → => #2631580: Write migration from Drupal 7 →
• webform → => https://www.drupal.org/project/webform_migrate →

Other items for the D7-D8 migrate :

- it needs suggestions to site builders, indicating which modules are supported migrate targets for the old D7 ones. E.g. when the jplayer module is seen in the source DB, it could suggest that installing the audiofile module + jplayer plugin before migrate would enable migrate to properly migrate the fields.

- There should be some way to export a Drupal migrate config, so that it can be worked on and extended by those who have the knowledge, without having to reinvent/recode all the bits that it does do. Ideally this would enable use of the migrate revert and retry functionality as well.

- An API was added to 8.8.0+ to provide a mechanism for contrib maintainers to identify each modules' upgrade paths within the Migrate UI → .