Add an option to use vendored libgit2

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cargo-show-asm"
-version = "0.1.20"
+version = "0.1.21"
 edition = "2021"
 description = "A cargo subcommand that displays the generated assembly of Rust source code."
 categories = ["development-tools::cargo-plugins", "development-tools::debugging" ]
@@ -15,6 +15,7 @@ license = "MIT OR Apache-2.0"
 anyhow = "1"
 bpaf = { version = "0.6", features = ["bpaf_derive"] }
 cargo = "0.65"
+git2 = { version = "0.14.2", optional = true } # same version as used by cargo
 glob = "0.3"
 line-span = "0.1"
 nom = "7"
@@ -29,6 +30,7 @@ nix = { version = "0.25", default-features = false, features = ["signal"] }
 
 [features]
 vendored-openssl = ["cargo/vendored-openssl"]
+vendored-libgit2 = ["git2/vendored-libgit2"]
 
 [[bin]]
 name = "cargo-asm"

Changelog.md

@@ -1,8 +1,14 @@
 # Change Log
 
+## [0.1.21] - 2022-09-29
+- options for vendored libgit2 and openssl
+- documentation improvements
+Thanks to @dtolnay, @matthiasbeyer and @saethlin
+
 ## [0.1.20] - 2022-09-24
 - Update cargo version to 0.65
 - Bump bpaf
+Thanks to @elichai
 
 ## [0.1.19] - 2022-09-23
 - detect missing sources and suggest to install them

README.md

@@ -89,6 +89,14 @@ $ cargo asm --lib Debug
 
 * `cargo-show-asm` also supports MIR (note that the formatting of human-readable MIR is not stable).
 
+# I'm on MacOS and `cargo-show-asm` fails to compile for me
+
+In case you encounter a problem with openssl and libgit - you can try enabling one or both:
+```console
+cargo install cargo-show-asm --features vendored-openssl,vendored-libgit2
+
+```
+
 # License
 This project is licensed under either of