transpile: remove git-testament dependency (for now) to remove time dependency to build on 1.80.0 (#1115)

* Fixes #1109.

Our old nightly (1.65) pins `time-macros` to an old version, which
requires `time` to stay on an old version. But since 1.80 broke `time`
(due to time-rs/time#693 and
rust-lang/rust#127343), we need to update
`time`. Doing this requires `time-macros` to be upgraded, which requires
at least rust 1.67. There's an old PR, #811, for this, but it needs
rebasing. So for now, removing `git-testament` and its `time` dependency
is simpler, and we can add it back later once we update to a newer
nightly.

With this fix, both `cargo build -p c2rust` (the pinned nightly) and
`cargo +stable build -p c2rust` (1.80.1) now work.

If this is good, and once we merge this, we'll release a new version
with the fix.

Author: kkysen

Cargo.lock

@@ -20,14 +20,11 @@ azure-devops = { project = "immunant/c2rust", pipeline = "immunant.c2rust", buil
 anyhow = "1.0"
 clap = { version = "3.2.22", features = ["yaml", "cargo", "derive"] }
 env_logger = "0.10"
-git-testament = "0.2.1"
 is_executable = "1.0"
 log = "0.4"
 regex = "1.3"
 shlex = "1.3"
 c2rust-transpile = { version = "0.18.0", path = "../c2rust-transpile" }
-# Required to avoid too-new version (dep of git-testament) which our rustc cannot compile
-time-macros = "=0.2.6"
 
 [build-dependencies]
 c2rust-build-paths = { path = "../c2rust-build-paths", version = "0.18.0" }

c2rust/Cargo.toml

@@ -1,6 +1,5 @@
 use anyhow::anyhow;
 use clap::{crate_authors, App, AppSettings, Arg};
-use git_testament::{git_testament, render_testament};
 use is_executable::IsExecutable;
 use std::borrow::Cow;
 use std::collections::HashMap;
@@ -11,8 +10,6 @@ use std::process;
 use std::process::Command;
 use std::str;
 
-git_testament!(TESTAMENT);
-
 /// A `c2rust` sub-command.
 struct SubCommand {
     /// The path to the [`SubCommand`]'s executable,
@@ -124,7 +121,7 @@ fn main() -> anyhow::Result<()> {
 
     // If we didn't get a subcommand, then use `clap` for parsing and error/help messages.
     let matches = App::new("C2Rust")
-        .version(&*render_testament!(TESTAMENT))
+        .version(env!("CARGO_PKG_VERSION"))
         .author(crate_authors!(", "))
         .settings(&[AppSettings::SubcommandRequiredElseHelp])
         .subcommands(sub_commands.keys().map(|name| {