Patch `tfcmt plan` comment

Instead of creating a new comment, you can update existing comment. This is useful to keep the pull request comments clean.

The option -patch has been added to tfcmt plan command.

tfcmt plan -patch -- terraform plan -no-color

And the configuration option plan_patch has been added.

plan_patch: true

The command line option -patch takes precedence over configuration file option plan_patch.

If you want to disable patching although plan_patch is true, please set -patch=false.

$ tfcmt plan -patch=false -- terraform plan -no-color

By patching the comment instead of creating a new comment, you can keep the pull request comments clean.

If the comment isn't patched expectedly, please set -log-level=debug.

$ tfcmt -log-level=debug plan -patch -- terraform plan -no-color

If you hide comments by github-comment hide and enable tfcmt plan's patch option, you should be careful not to hide tfcmt plan's comments.

There are some ways to fix the problem.

Stop using github-comment hide
Fix github-comment hide's condition and exclude tfcmt's comments from the target ofgithub-comment hide
Run github-comment hide after tfcmt

Patch tfcmt plan comment