Edit PR comment option overrides another stack's comment if it's prefix of another

[Xander-Polishchuk]

What happened?

The code responsible for updating PR comments, checks header with startsWith, which prone to override another stack's comment if one stack is named as prefix of another if run after.

In our case we have two stacks, default region dev stack and stack for some specific region, e.g. dev and dev-tokyo

The issue code line:

actions/src/libs/pr.ts

Lines 56 to 58 in 0806784

	const comment = comments.find((comment) =>
	comment.body.startsWith(heading) && comment.body.includes(summary),
	);

A simple, quick solution is to add some ending symbol like . after ${stackName}:

actions/src/libs/pr.ts

Line 19 in 0806784

const heading = `#### :tropical_drink: \`${command}\` on ${projectName}/${stackName}`;

Like: #### :tropical_drink: \`${command}\` on ${projectName}/${stackName}.

Example

Create stack with name dev and another stack with name dev-tokyo.

Output of pulumi about

N/A

Additional context

No response

Contributing

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[justinvp]

Thanks for opening the issue and the suggestion.

I'm curious if we could look for newline characters at the end of the heading (\n or \r\n) rather than introducing the . at the end of the heading.

Would you be interested in contributing a fix, @Xander-Polishchuk?

[Xander-Polishchuk]

I would say any solution that checks ${stackName} as a whole instead of prefix will work. So, \n / \r\n should work too.