Move git utilities into a dedicated crate (#15564)

- create `codex-git-utils` and move the shared git helpers into it with
file moves preserved for diff readability
- move the `GitInfo` helpers out of `core` so stacked rollout work can
depend on the shared crate without carrying its own git info module

---------

Co-authored-by: Ahmed Ibrahim <219906144+aibrahim-oai@users.noreply.github.com>
Co-authored-by: Codex <noreply@openai.com>

codex-rs/Cargo.lock

@@ -380,7 +380,7 @@ version = "1.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "40c48f72fd53cd289104fc64099abca73db4166ad86ea0b4341abe65af83dadc"
 dependencies = [
- "windows-sys 0.60.2",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -391,7 +391,7 @@ checksum = "291e6a250ff86cd4a820112fb8898808a366d8f9f58ce16d1f538353ad55747d"
 dependencies = [
  "anstyle",
  "once_cell_polyfill",
- "windows-sys 0.60.2",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -1444,6 +1444,7 @@ dependencies = [
  "codex-features",
  "codex-feedback",
  "codex-file-search",
+ "codex-git-utils",
  "codex-login",
  "codex-otel",
  "codex-protocol",
@@ -1509,6 +1510,7 @@ dependencies = [
  "anyhow",
  "clap",
  "codex-experimental-api-macros",
+ "codex-git-utils",
  "codex-protocol",
  "codex-utils-absolute-path",
  "codex-utils-cargo-bin",
@@ -1643,7 +1645,7 @@ dependencies = [
  "clap",
  "codex-connectors",
  "codex-core",
- "codex-git",
+ "codex-git-utils",
  "codex-utils-cargo-bin",
  "codex-utils-cli",
  "pretty_assertions",
@@ -1768,6 +1770,7 @@ dependencies = [
  "codex-client",
  "codex-cloud-tasks-client",
  "codex-core",
+ "codex-git-utils",
  "codex-login",
  "codex-tui",
  "codex-utils-cli",
@@ -1794,7 +1797,7 @@ dependencies = [
  "async-trait",
  "chrono",
  "codex-backend-client",
- "codex-git",
+ "codex-git-utils",
  "diffy",
  "serde",
  "serde_json",
@@ -1879,7 +1882,7 @@ dependencies = [
  "codex-execpolicy",
  "codex-features",
  "codex-file-search",
- "codex-git",
+ "codex-git-utils",
  "codex-hooks",
  "codex-login",
  "codex-network-proxy",
@@ -1993,6 +1996,7 @@ dependencies = [
  "codex-cloud-requirements",
  "codex-core",
  "codex-feedback",
+ "codex-git-utils",
  "codex-otel",
  "codex-protocol",
  "codex-utils-absolute-path",
@@ -2133,10 +2137,12 @@ dependencies = [
 ]
 
 [[package]]
-name = "codex-git"
+name = "codex-git-utils"
 version = "0.0.0"
 dependencies = [
  "assert_matches",
+ "codex-utils-absolute-path",
+ "futures",
  "once_cell",
  "pretty_assertions",
  "regex",
@@ -2144,6 +2150,7 @@ dependencies = [
  "serde",
  "tempfile",
  "thiserror 2.0.18",
+ "tokio",
  "ts-rs",
  "walkdir",
 ]
@@ -2389,7 +2396,7 @@ version = "0.0.0"
 dependencies = [
  "anyhow",
  "codex-execpolicy",
- "codex-git",
+ "codex-git-utils",
  "codex-utils-absolute-path",
  "codex-utils-image",
  "icu_decimal",
@@ -2484,6 +2491,7 @@ dependencies = [
  "age",
  "anyhow",
  "base64 0.22.1",
+ "codex-git-utils",
  "codex-keyring-store",
  "keyring",
  "pretty_assertions",
@@ -2554,6 +2562,7 @@ dependencies = [
  "anyhow",
  "chrono",
  "clap",
+ "codex-git-utils",
  "codex-protocol",
  "dirs",
  "log",
@@ -2620,6 +2629,7 @@ dependencies = [
  "codex-features",
  "codex-feedback",
  "codex-file-search",
+ "codex-git-utils",
  "codex-login",
  "codex-otel",
  "codex-protocol",
@@ -2713,6 +2723,7 @@ dependencies = [
  "codex-features",
  "codex-feedback",
  "codex-file-search",
+ "codex-git-utils",
  "codex-login",
  "codex-otel",
  "codex-protocol",
@@ -3836,7 +3847,7 @@ dependencies = [
  "libc",
  "option-ext",
  "redox_users 0.5.2",
- "windows-sys 0.59.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -4081,7 +4092,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
 dependencies = [
  "libc",
- "windows-sys 0.52.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -5526,7 +5537,7 @@ checksum = "3640c1c38b8e4e43584d8df18be5fc6b0aa314ce6ebf51b53313d4306cca8e46"
 dependencies = [
  "hermit-abi",
  "libc",
- "windows-sys 0.52.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -6289,7 +6300,7 @@ version = "0.50.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7957b9740744892f114936ab4a57b3f487491bbeafaf8083688b16841a4240e5"
 dependencies = [
- "windows-sys 0.59.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -6933,7 +6944,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7d8fae84b431384b68627d0f9b3b1245fcf9f46f6c0e3dc902e9dce64edd1967"
 dependencies = [
  "libc",
- "windows-sys 0.45.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -8355,7 +8366,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys 0.11.0",
- "windows-sys 0.52.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -9788,7 +9799,7 @@ dependencies = [
  "getrandom 0.3.4",
  "once_cell",
  "rustix 1.1.3",
- "windows-sys 0.52.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -11234,7 +11245,7 @@ version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22"
 dependencies = [
- "windows-sys 0.48.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]