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-rw-r--r--cc/src/bin/gcc-shim.rs39
1 files changed, 32 insertions, 7 deletions
diff --git a/cc/src/bin/gcc-shim.rs b/cc/src/bin/gcc-shim.rs
index 7fd0ea8..1731df8 100644
--- a/cc/src/bin/gcc-shim.rs
+++ b/cc/src/bin/gcc-shim.rs
@@ -6,18 +6,43 @@ use std::io::prelude::*;
use std::path::PathBuf;
fn main() {
- let out_dir = PathBuf::from(env::var_os("GCCTEST_OUT_DIR").unwrap());
+ let mut args = env::args();
+ let program = args.next().expect("Unexpected empty args");
+
+ let out_dir = PathBuf::from(
+ env::var_os("GCCTEST_OUT_DIR").expect(&format!("{}: GCCTEST_OUT_DIR not found", program)),
+ );
+
+ // Find the first nonexistent candidate file to which the program's args can be written.
for i in 0.. {
- let candidate = out_dir.join(format!("out{}", i));
+ let candidate = &out_dir.join(format!("out{}", i));
+
+ // If the file exists, commands have already run. Try again.
if candidate.exists() {
continue;
}
- let mut f = File::create(candidate).unwrap();
- for arg in env::args().skip(1) {
- writeln!(f, "{}", arg).unwrap();
- }
- File::create(out_dir.join("libfoo.a")).unwrap();
+ // Create a file and record the args passed to the command.
+ let mut f = File::create(candidate).expect(&format!(
+ "{}: can't create candidate: {}",
+ program,
+ candidate.to_string_lossy()
+ ));
+ for arg in args {
+ writeln!(f, "{}", arg).expect(&format!(
+ "{}: can't write to candidate: {}",
+ program,
+ candidate.to_string_lossy()
+ ));
+ }
break;
}
+
+ // Create a file used by some tests.
+ let path = &out_dir.join("libfoo.a");
+ File::create(path).expect(&format!(
+ "{}: can't create libfoo.a: {}",
+ program,
+ path.to_string_lossy()
+ ));
}