git2: Disable default features

[Turbo87]

This fixes #36 by disabling the git2 features that rely on openssl-sys, since it looks like we're not actually using any of them in this crate :)

[CraZySacX]

Can you instead build with cargo build --no-default-features --features build,rustc?

Or in your Cargo.toml
vergen = { version = "4', default-features = false, features = ["build", "rustc"] }

[CraZySacX]

Yeah I created a new bin project, added vergen as I described above, and openssl-sys is not pulled in. I'd prefer that solution to this PR. Let me know if it doesn't work out for you.

cargo-tree output >
[build-dependencies]
└── vergen v4.0.0
    ├── bitflags v1.2.1
    ├── chrono v0.4.19
    │   ├── libc v0.2.86
    │   ├── num-integer v0.1.44
    │   │   └── num-traits v0.2.14
    │   │       [build-dependencies]
    │   │       └── autocfg v1.0.1
    │   │   [build-dependencies]
    │   │   └── autocfg v1.0.1
    │   ├── num-traits v0.2.14 (*)
    │   └── time v0.1.44
    │       └── libc v0.2.86
    ├── enum-iterator v0.6.0
    │   └── enum-iterator-derive v0.6.0 (proc-macro)
    │       ├── proc-macro2 v1.0.24
    │       │   └── unicode-xid v0.2.1
    │       ├── quote v1.0.9
    │       │   └── proc-macro2 v1.0.24 (*)
    │       └── syn v1.0.60
    │           ├── proc-macro2 v1.0.24 (*)
    │           ├── quote v1.0.9 (*)
    │           └── unicode-xid v0.2.1
    ├── getset v0.1.1 (proc-macro)
    │   ├── proc-macro-error v1.0.4
    │   │   ├── proc-macro-error-attr v1.0.4 (proc-macro)
    │   │   │   ├── proc-macro2 v1.0.24 (*)
    │   │   │   └── quote v1.0.9 (*)
    │   │   │   [build-dependencies]
    │   │   │   └── version_check v0.9.2
    │   │   ├── proc-macro2 v1.0.24 (*)
    │   │   ├── quote v1.0.9 (*)
    │   │   └── syn v1.0.60 (*)
    │   │   [build-dependencies]
    │   │   └── version_check v0.9.2
    │   ├── proc-macro2 v1.0.24 (*)
    │   ├── quote v1.0.9 (*)
    │   └── syn v1.0.60 (*)
    ├── rustc_version v0.3.3
    │   └── semver v0.11.0
    │       └── semver-parser v0.10.2
    │           └── pest v2.1.3
    │               └── ucd-trie v0.1.3
    ├── serde v1.0.123
    └── serde_derive v1.0.123 (proc-macro)
        ├── proc-macro2 v1.0.24 (*)
        ├── quote v1.0.9 (*)
        └── syn v1.0.60 (*)
    [build-dependencies]
    └── chrono v0.4.19 (*)

[Turbo87]

unfortunately I specifically need the SHA of the commit for Sentry integration and other things, so disabling the git feature won't work.

[codecov]

Codecov Report

Merging #37 (5e4c3ec) into master (862f1e8) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master       #37   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           11        11           
  Lines          492       492           
=========================================
  Hits           492       492           

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[CraZySacX]

Ok, I see. You still need the git feature. This will also fix #41.