Fix publish workflow failure with the new trivy action changes

[TharmiganK]

Description

With the latest trivy action version, the caching is enabled by default. The cache will be stored in $GITHUB_WORKSPACE/.cache/trivy. More information can be found here.

Since the libraries does not ignore this specific directory - .cache, the gradle release sub task - checkCommitNeeded will fail since this directory is not committed. Sample failure can be found here.

There are two possible options to resolve this issue:

• Option 1: Disable caching in the trivy action step for publish workflow
• Option 2: Add .cache/ to the .gitignore file of each repository

I prefer the Option 1 since it requires the least changes

Version

Ballerina SwanLake Update 11

[NipunaRanasinghe]

@TharmiganK is there a significant time difference when Trivy caching is disabled?
If we can come up with those numbers it'll be easier to decide between option 1 and option 2 based on the impact. wdyt?

[daneshk]

I also encountered this a few times when releasing the library modules and went with option 2. As per the document referred to, if we disable it, we may experience rate-limiting issues. Has this caching been enabled recently, as we have seen recently?
Option 02 is safe, as we don't know whether we encounter a rate-limiting issue. But it needs more effort.

[TharmiganK]

is there a significant time difference when Trivy caching is disabled? If we can come up with those numbers it'll be easier to decide between option 1 and option 2 based on the impact. wdyt?

The difference is only in seconds. But as @daneshk mentioned caching partially solve the rate-limiting issues and we have added this another fix for rate limiting as well.

Btw I am thinking of a third option which uses this cache-dir option in the trivy action. If we overwrite that to some temporary directory then it won't affect the gradle publish task right?

      - name: Run Trivy vulnerability scanner
        uses: aquasecurity/trivy-action@master
        env:
          TRIVY_DB_REPOSITORY: ghcr.io/aquasecurity/trivy-db,public.ecr.aws/aquasecurity/trivy-db
          TRIVY_JAVA_DB_REPOSITORY: ghcr.io/aquasecurity/trivy-java-db,public.ecr.aws/aquasecurity/trivy-java-db
        with:
          scan-type: "rootfs"
          scan-ref: "${{ github.workspace }}/ballerina/lib"
          format: "table"
          timeout: "10m0s"
          exit-code: "1"
          scanners: "vuln"
          cache-dir: "/tmp/trivy-cache"