Deployment with Git detection of pending migrations

git_commands.md

Helpful Git Commands

These are some useful git commands for implementing this in your own deployment setup.

Detecting if we're running on a clean checkout:

• git fetch
• git diff --shortstat [branch]

Determining if there are pending migrations:

• git diff --shortstat [last_tag] [branch] db/migrate

Displaying new migrations in list form:

• git diff --summary [last_tag] [branch] db/migrate

Adding new tags (you want to annotate your tags):

• git tag -a [new_tag] -m "annotation for tag"
• git push --tags

Deleting a tag:

• git tag -d [tag]
• git push --tags

migration_detected_with_git.txt

sleipnir:api karl$ cap production deploy
  * 15:00:36 == Currently executing `production'
    triggering start callbacks for `deploy'
  * 15:00:36 == Currently executing `multistage:ensure'
  * 15:00:36 == Currently executing `deploy'
    triggering before callbacks for `deploy'
*** Deploying HEAD from branch 'master' to 'production'
*** Pending migrations!!!
 create mode 100644 db/migrate/20120327113515_store_info_in_alerts.rb
 create mode 100644 db/migrate/20120327190626_add_pending_data_table.rb
 create mode 100644 db/migrate/20120329102140_populate_pending_data_table.rb
Do you want to continue deployment? (Y/N)
n
*** Aborting deployment!