Add tagging of remote repo.

[arknoll]

Fixes #830.

Changes proposed:
Todos:

• Create a new deploy:tag target, which create a tag on remotes.
• Add a prompt to the deploy target which asks Would you like to create a tag?.
• If yes, prompt for tag name "Enter the name of the tag to create:" and use input to set the value of deploy.tag property.
• Modify deploy target. If deploy.tag is set, call deploy:tag after deploy:commit.
• Modify deploy:push-remote target. If deploy.tag is set, push tags too.
• Document new feature.

Note: I incorporated this into my project's .travis.yml by adding:

deploy:
   - provider: script
     script: blt deploy -Ddeploy.commitMsg="Automated commit by Travis CI for Build ${TRAVIS_TAG}" -Ddeploy.branch="master-build" -Ddeploy.tag="${TRAVIS_TAG}"
     skip_cleanup: true
     on:
       tags: true
       php: 5.6

Using this in travisCI will force a tag on the master branch. TRAVIS_BRANCH variable is set to the same as TRAVIS_TAG when travis is building based on a tag.

[grasmash]

I think we need to split this into two prompts:

• Add a prompt to the deploy target which asks Would you like to create a tag?.
• If yes, prompt for tag name "Enter the name of the tag to create:" and use input to set the value of deploy.tag property.

Otherwise, this will always create a tag.

[arknoll]

refactoring now.

[grasmash]

remoteName should already be set here, so I think this line can be removed.

[grasmash]

This tags the "build" repo, but not the source repo, right?

[arknoll]

correct

[grasmash]

Don't we want to also tag the source repo? @geerlingguy

[geerlingguy]

It's failing on the Drupal VM test (/home/travis/build/acquia/blt/tests/phpunit/Blt/DrupalVmTest.php:36)... that doesn't seem related.

[arknoll]

@geerlingguy it looks like 8.x branch itself is failing. I agree, this seems unrelated to this PR.

[geerlingguy]

@grasmash - I think I noticed a note about tagging the source repo... basically this should only create a tag in the artifact repo if the build is being run on a tag already created in the source repo (I think, right?).