Dependency explosion in version 4

[heftig]

The recent switch from git CLI to libgit2 caused an explosion in build dependencies, including new non-Rust libraries:

Before (version = "3"):

~/foo> =time cargo build --release
   Compiling autocfg v1.0.1
   Compiling libc v0.2.86
   Compiling ucd-trie v0.1.3
   Compiling bitflags v1.2.1
   Compiling pest v2.1.3
   Compiling num-traits v0.2.14
   Compiling num-integer v0.1.44
   Compiling time v0.1.44
   Compiling semver-parser v0.10.2
   Compiling semver v0.11.0
   Compiling chrono v0.4.19
   Compiling rustc_version v0.3.3
   Compiling vergen v3.2.0
   Compiling foo v0.1.0 (/home/jan/foo)
    Finished release [optimized] target(s) in 5.21s
13.45user 1.53system 0:05.33elapsed 281%CPU (0avgtext+0avgdata 291084maxresident)k
0inputs+117968outputs (4major+356809minor)pagefaults 0swaps

After (version = "4", only git feature):

~/foo> =time cargo build --release
   Compiling libc v0.2.86
   Compiling autocfg v1.0.1
   Compiling pkg-config v0.3.19
   Compiling proc-macro2 v1.0.24
   Compiling unicode-xid v0.2.1
   Compiling version_check v0.9.2
   Compiling syn v1.0.60
   Compiling matches v0.1.8
   Compiling tinyvec_macros v0.1.0
   Compiling log v0.4.14
   Compiling bitflags v1.2.1
   Compiling percent-encoding v2.1.0
   Compiling serde_derive v1.0.123
   Compiling cfg-if v1.0.0
   Compiling serde v1.0.123
   Compiling openssl-probe v0.1.2
   Compiling unicode-bidi v0.3.4
   Compiling tinyvec v1.1.1
   Compiling proc-macro-error-attr v1.0.4
   Compiling proc-macro-error v1.0.4
   Compiling num-traits v0.2.14
   Compiling num-integer v0.1.44
   Compiling form_urlencoded v1.0.0
   Compiling quote v1.0.9
   Compiling unicode-normalization v0.1.17
   Compiling jobserver v0.1.21
   Compiling time v0.1.44
   Compiling cc v1.0.66
   Compiling idna v0.2.1
   Compiling chrono v0.4.19
   Compiling openssl-sys v0.9.60
   Compiling libz-sys v1.1.2
   Compiling libssh2-sys v0.2.21
   Compiling libgit2-sys v0.12.18+1.1.0
   Compiling url v2.2.0
   Compiling vergen v4.0.1
   Compiling enum-iterator-derive v0.6.0
   Compiling getset v0.1.1
   Compiling enum-iterator v0.6.0
   Compiling git2 v0.13.17
   Compiling foo v0.1.0 (/home/jan/foo)
    Finished release [optimized] target(s) in 17.79s
88.06user 9.09system 0:17.91elapsed 542%CPU (0avgtext+0avgdata 387964maxresident)k
3216inputs+488912outputs (5major+1096040minor)pagefaults 0swaps

[heftig]

I don't think you need git2's default features (such as https and ssh)? That would already remove a few things.

[CraZySacX]

This is fixed by #37. I'll be cutting a minor release after CI has finished.