fix: mooncake_master -version prints release version and git commit hash

[Copilot]

mooncake_master -version printed mooncake_master (the program name) instead of a meaningful version string, because gflags::SetVersionString() was never called.

Description

This fix sources the display version from mooncake-wheel/pyproject.toml and appends the short git commit hash, while leaving MOONCAKE_STORE_VERSION (used for RPC handshake) unchanged.

Changes:

• mooncake-store/CMakeLists.txt

  • Reads the release version from mooncake-wheel/pyproject.toml at CMake configure time
  • Captures the short git commit hash via git rev-parse --short HEAD
  • Combines them into MOONCAKE_DISPLAY_VERSION (e.g. "0.3.10.post2 (git: abc1234)")
  • Falls back to MOONCAKE_STORE_VERSION with a warning if pyproject.toml is missing or unreadable

• mooncake-store/include/version.h.in

  • Added MOONCAKE_DISPLAY_VERSION constant alongside the existing MOONCAKE_STORE_VERSION

• mooncake-store/src/master.cpp

  • Include version.h
  • Call gflags::SetVersionString(mooncake::MOONCAKE_DISPLAY_VERSION) before ParseCommandLineFlags()

After this change:

$ mooncake_master -version
mooncake_master version 0.3.10.post2 (git: abc1234)

MOONCAKE_STORE_VERSION remains "2.0.0" and is unaffected.

Module

• Transfer Engine (mooncake-transfer-engine)
• Mooncake Store (mooncake-store)
• Mooncake EP (mooncake-ep)
• Integration (mooncake-integration)
• P2P Store (mooncake-p2p-store)
• Python Wheel (mooncake-wheel)
• PyTorch Backend (mooncake-pg)
• Mooncake RL (mooncake-rl)
• CI/CD
• Docs
• Other

Type of Change

• Bug fix
• New feature
• Refactor
• Breaking change
• Documentation update
• Other

How Has This Been Tested?

Verified that gflags::SetVersionString is called with MOONCAKE_DISPLAY_VERSION before ParseCommandLineFlags, which causes gflags to print the version string and exit when -version is passed. Confirmed that the CMake regex correctly extracts 0.3.10.post2 from pyproject.toml and that git rev-parse --short HEAD produces a valid short hash.

Checklist

• I have performed a self-review of my own code.
• I have formatted my own code using ./scripts/code_format.sh before submitting.
• I have updated the documentation.
• I have added tests to prove my changes are effective.

[00fish0]

Thanks @stmatengss — this unblocks the immediate --version issue cleanly.

One observation that might be worth a follow-up: MOONCAKE_STORE_VERSION has been pinned at "2.0.0" since it was introduced in #1061 back in Nov 2025. The wheel has shipped 0.3.10, 0.3.10.post1, and 0.3.10.post2, so after this PR --version will keep returning 2.0.0 regardless of which release the user is on.

If useful, I have a small follow-up prepared locally that:

• Sources the display version from mooncake-wheel/pyproject.toml (currently 0.3.10.post2) and appends the short git commit, e.g.:

mooncake_master version 0.3.10.post2 (git: abc1234)

• Leaves MOONCAKE_STORE_VERSION exactly as it is in this PR, so the RPC handshake stays untouched.

[stmatengss]

Thanks @stmatengss — this unblocks the immediate --version issue cleanly.

One observation that might be worth a follow-up: MOONCAKE_STORE_VERSION has been pinned at "2.0.0" since it was introduced in #1061 back in Nov 2025. The wheel has shipped 0.3.10, 0.3.10.post1, and 0.3.10.post2, so after this PR --version will keep returning 2.0.0 regardless of which release the user is on.

If useful, I have a small follow-up prepared locally that:

• Sources the display version from mooncake-wheel/pyproject.toml (currently 0.3.10.post2) and appends the short git commit, e.g.:

mooncake_master version 0.3.10.post2 (git: abc1234)

• Leaves MOONCAKE_STORE_VERSION exactly as it is in this PR, so the RPC handshake stays untouched.

@copilot According to the review, fix issues.

[Copilot]

Thanks @stmatengss — this unblocks the immediate --version issue cleanly.

One observation that might be worth a follow-up: MOONCAKE_STORE_VERSION has been pinned at "2.0.0" since it was int...

Done in commit 4b5735b. The --version flag now outputs the version from mooncake-wheel/pyproject.toml plus the short git commit hash, e.g.:

mooncake_master version 0.3.10.post2 (git: abc1234)

MOONCAKE_STORE_VERSION is left unchanged at "2.0.0" so the RPC handshake is unaffected. A fallback to MOONCAKE_STORE_VERSION is in place if pyproject.toml is ever missing or unparseable.