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Add --version flag showing git tag and sha

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```
│  Agent powering down. Goodbye!
│
│  Interaction Summary
│  Session ID:                 66751fe9-fcad-4221-a90a-34d84d303807
│  Tool Calls:                 15 ( ✓ 15 x 0 )
│  Success Rate:               100.0%
│  User Agreement:             100.0% (15 reviewed)
│  Code Changes:               +81 -0
│
│  Performance
│  Wall Time:                  9m 51s
│  Agent Active:               2m 50s
│    » API Time:               1m 40s (58.6%)
│    » Tool Time:              1m 10s (41.4%)
│
│
│  Model Usage                 Reqs   Input Tokens   Cache Reads  Output Tokens
│  ────────────────────────────────────────────────────────────────────────────
│  gemini-2.5-flash-lite          2          2,635             0            199
│  gemini-3-pro-preview          15         54,232       163,544          1,828
│
│  Savings Highlight: 163,544 (74.2%) of input tokens were served from the cache, reducing costs.
```
This commit is contained in:
hak8or
2026-01-10 14:17:25 -05:00
parent f13906d762
commit 4c2086e2b4
3 changed files with 81 additions and 0 deletions
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vibe_coding_log/session_2026_01_10_version_flag.md Normal file
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# Session Log: Add Version Flag
**Date**: Saturday, January 10, 2026
**Model**: Gemini (CLI Agent)
**Goal**: Add a `--version` flag that displays the git tag and short SHA.
**Outcome**: Implemented dynamic versioning using `build.rs` and `clap`.
---
## Transcript Summary
### 1. Version Flag Implementation
**User**: Requested a `--version` flag that output the latest git tag. If the current commit is not exactly on a tag, it should append the short SHA (e.g., `v0.6-gd8a9fc`).
**Agent Action**:
1. Analyzed `Cargo.toml` and `src/main.rs`.
2. Created a `build.rs` script to handle the logic:
* Tries `git describe --tags --exact-match`.
* If that fails, tries `git describe --tags --abbrev=0` (latest tag) combined with `git rev-parse --short HEAD` (current SHA).
* Sets the `GIT_VERSION` environment variable.
3. Modified `src/main.rs`:
* Updated the `clap` `Args` struct to use `#[command(version = env!("GIT_VERSION"))]`.
4. Verified the output using `cargo run -- --version`.
### 2. Verification
**User**: Implicitly relied on agent verification.
**Agent Action**:
1. Ran `cargo run -- --version` -> Output: `gitea-mirror v0.6-gf13906d` (correct format).
2. Created a temporary tag `v0.7.0-test`, verified output was `gitea-mirror v0.7.0-test`, then deleted the tag.
3. Ran `cargo clippy` (clean).
4. Committed changes including the new `build.rs` and updated `src/main.rs`.
## Final State
The application now supports `gitea-mirror --version` which dynamically reports the git version at build time.