1. Does this PR affect any open issues?(Y/N) and add issue references (e.g. "fix #123", "re #123".):

• N
• Y

fix #664

2. What is the scope of this PR (e.g. component or file name):

pkg/downloader/downloader.go
pkg/downloader/downloader_test.go

3. Provide a description of the PR(e.g. more details, effects, motivations or doc link):

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Other

The Download function in the downloader.DepDownloader struct did not verify whether the cache folder of the package contained a kcl.mod file, and incorrectly skipped downloading the module. As a result, when downloader.FindPackageByModSpec returned an error, the run was interrupted.

However, a proper check for the kcl.mod file already exists further down in the downloader.DepDownloader.Download function.

4. Are there any breaking changes?(Y/N) and describe the breaking changes(e.g. more details, motivations or doc link):

• N
• Y

5. Are there test cases for these changes?(Y/N) select and add more details, references or doc links:

• Unit test
• Integration test
• Benchmark (add benchmark stats below)
• Manual test (add detailed scripts or steps below)
• Other