git-sugdiff: Use `diff_options.parse()` to extract diff options

Config::get():
Change `args` type so we can pass both a `Vec<String>` and
`Vec<&String>`.

diff_options.parse():
* Split diff arguments and program arguments by returning a tuple.
* Exit the args loop once we've parsed an argument.
* Update test
* Add a non-working test for suggestion arguments. An `OPT_OPTIONS`
  argument could be followed by an argument that's not the value of the
  `OPT_OPTIONS` option. Currently, that arg will always be parsed as the
  value. We need to handle this case.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/bin/git-sugdiff.rs b/src/bin/git-sugdiff.rs
index 6b95239..13c3292 100644
--- a/src/bin/git-sugdiff.rs
+++ b/src/bin/git-sugdiff.rs
@@ -22,6 +22,7 @@ use exitcode;
 
 use github_suggestion_cli::{gseprintln, for_suggestion};
 use github_suggestion_cli::config::Config;
+use github_suggestion_cli::diff_options;
 
 
 fn main() {
@@ -30,6 +31,10 @@ fn main() {
     // TODO: Shift all diff options from args, then pass them to Config::get().
     // Add diff options to Command call below.
 
+    let (args, diff_args) = diff_options::parse(&args);
+    dbg!(&args);
+    dbg!(&diff_args);
+
     let config = match Config::get(
         &args,
         "usage: git sugdiff [options] <suggestion>...",
@@ -56,6 +61,7 @@ fn main() {
             match Command::new("git")
                 .arg("--no-pager")
                 .arg("diff")
+                .args(&diff_args)
                 .arg(format!("{}:{}", suggestion.commit(), suggestion.path()))
                 .arg(blob.to_string())
                 .spawn()