#2719 #2752 #2810 GH Actions for CI Pipeline

[christian-kreuzberger-dtx]

This PR addresses the following issues:

• Remove hard-dependency of MacOS builds in travis-ci #2719
• Move docker builds from travis-ci to GitHub Actions #2752
• CI Pipeline: Migrate building helm-chart from Travis CI to GH action, and provide it as an artifact #2810

Additional Changes:

• I've introduced a .ci_env file which is used to store all CI relevant environment variables
• • I've cleaned certain bash scripts that were used for travis-ci before
• I've created a single "CI Workflow" that handles all the three issues linekd above, as well as unit tests

Regarding the Prepare job: This checks the repo for changes and other stuff, and prepares environment variables for other jobs, namely:

• BUILD_EVERYTHING - indicates that everything should be built (cli, docker images, helm chart)
• BUILD_{DIRNAME} - indicates that only a certain directory should be built (e.g., for PRs where only the api or the cli was touched)
• Several metadata like BRANCH, GIT_SHA, DATETIME
• One important thing: We autogenerate VERSION based on
  • If it is a push on a release-branch (e.g., release-x.y.z), then VERSION=x.y.z
  • Else, we determine the last "tag" and increase the patch level, e.g., from 0.7.3 to 0.7.4
    • If it is a Pull Request, then VERSION=${NEXTTAG}-dev-PR-{PRID}
    • If it is a push on master, then VERSION=${NEXTTAG}-dev

Note 1: Due to a problem with Unit tests for CLI on Windows I had to disable them
Note 2: Due to maintenance of MacOS runners I had to disable everything related to MacOS for now actions/runner-images#2247

Docker Images are automatically pushed to DockerHub.
Everything else (CLI build, Helm Chart) is currently only pushed as an artifact of the workflow.

I'll create follow-up issues:

1. Automatically create a dev (or latest) release which stores the CLI and Helm-Chart such that it can be directly downloaded
2. Automatically create a release draft for changes on release branches
3. Enable MacOS builds again once maintenance is complete
4. Move certain "bash scripts" into a separate re-usable (for keptn-contrib/sandbox) GH action

Signed-off-by: Christian Kreuzberger christian.kreuzberger@dynatrace.com

[codecov-io]

Codecov Report

Merging #2817 (4947121) into master (09faf22) will increase coverage by 19.42%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #2817       +/-   ##
===========================================
+ Coverage   36.24%   55.66%   +19.42%     
===========================================
  Files         161        2      -159     
  Lines        9370      309     -9061     
  Branches      197        0      -197     
===========================================
- Hits         3396      172     -3224     
+ Misses       5430      110     -5320     
+ Partials      544       27      -517     

Flag	Coverage Δ
moduleA	?

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Impacted Files	Coverage Δ
...vice/event_handler/configure_monitoring_handler.go
helm-service/pkg/helm/test_util.go
cli/cmd/get_event_approvalTriggered.go
cli/cmd/update.go
helm-service/pkg/mesh/ingress_config.go
cli/cmd/generate_docs.go
...ouse-service/event_handler/evaluate_sli_handler.go
cli/cmd/upgrade.go
..._components/ktb-markdown/ktb-markdown.component.ts
bridge/client/app/_models/http-progress-state.ts
... and 131 more

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[johannes-b]

lgtm