feat(wanda): add digest subcommand to wanda CLI

[andrew-anyscale]

Extends the wanda CLI with a 'digest' subcommand that calls
wanda.Digest and prints the content-addressed digest to stdout.
Supports both local mode (spec file as positional argument) and
RayCI mode (spec file from RAYCI_WANDA_FILE).

Topic: wanda-digest-cli
Relative: wanda-digest
Signed-off-by: andrew andrew@anyscale.com

[andrew-anyscale]

Reviews in this chain:
└#455 feat(wanda): add digest subcommand to wanda CLI

[andrew-anyscale]

#	head	base	diff	date	summary
0	c5bcc089	ae7dff66	diff	Mar 10 13:25 PM	1 file changed, 14 insertions(+)
1	aed9f07d	50233428	diff	Mar 10 13:48 PM	1 file changed, 7 insertions(+), 8 deletions(-)
2	bd2c4b22	50233428	diff	Mar 10 13:51 PM	1 file changed, 4 insertions(+), 2 deletions(-)
3	54c27a47	62b6215f	rebase	Mar 10 18:06 PM	0 files changed
4	c43fc088	2b8ead37	rebase	Mar 10 18:09 PM	0 files changed
5	af6c1f32	953c2390	diff	Mar 10 18:36 PM	1 file changed, 21 insertions(+), 21 deletions(-)

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the wanda command-line interface by integrating a new digest subcommand. This addition provides users with a lightweight method to quickly retrieve the content-addressed digest of a given spec file, bypassing the need for a full build process. This capability is particularly useful for validation, debugging, or integration with other systems that rely on content hashes, streamlining workflows for both local development and RayCI environments.

Highlights

• New digest subcommand: Introduced a digest subcommand to the wanda CLI, allowing users to print the content-addressed digest of a spec file without triggering a full build. This subcommand supports both local file input and RayCI environment variables.

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Changelog

• wanda/wanda/main.go
  • Added a new digest subcommand to the wanda CLI.
  • Implemented logic to parse the digest subcommand argument.
  • Integrated the call to wanda.Digest when the digest subcommand is used.

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[gemini-code-assist]

Code Review

This pull request adds a digest subcommand to the wanda CLI, which is a useful feature. The implementation, however, introduces ambiguity in command-line argument parsing. My review focuses on suggesting a more robust subcommand handling mechanism to prevent potential bugs and improve maintainability, for instance when trying to process a file named digest.

[aslonnie]

change to use flagset for flag parsing? so that we are not manipulating the value of os.Args ?

[andrew-anyscale]

Good call, updated!