Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

1 files changed, 70 insertions, 0 deletions

diff --git a/vendor/cc/src/bin/gcc-shim.rs b/vendor/cc/src/bin/gcc-shim.rs
new file mode 100644
index 0000000..e5b5372
--- /dev/null
+++ b/vendor/cc/src/bin/gcc-shim.rs
@@ -0,0 +1,70 @@
+#![cfg_attr(test, allow(dead_code))]
+
+use std::env;
+use std::fs::File;
+use std::io::{self, prelude::*};
+use std::path::PathBuf;
+
+fn main() {
+    let mut args = env::args();
+    let program = args.next().expect("Unexpected empty args");
+
+    let out_dir = PathBuf::from(
+        env::var_os("GCCTEST_OUT_DIR")
+            .unwrap_or_else(|| panic!("{}: GCCTEST_OUT_DIR not found", program)),
+    );
+
+    // Find the first nonexistent candidate file to which the program's args can be written.
+    let candidate = (0..).find_map(|i| {
+        let candidate = out_dir.join(format!("out{}", i));
+
+        if candidate.exists() {
+            // If the file exists, commands have already run. Try again.
+            None
+        } else {
+            Some(candidate)
+        }
+    }).unwrap_or_else(|| panic!("Cannot find the first nonexistent candidate file to which the program's args can be written under out_dir '{}'", out_dir.display()));
+
+    // Create a file and record the args passed to the command.
+    let f = File::create(&candidate).unwrap_or_else(|e| {
+        panic!(
+            "{}: can't create candidate: {}, error: {}",
+            program,
+            candidate.display(),
+            e
+        )
+    });
+    let mut f = io::BufWriter::new(f);
+
+    (|| {
+        for arg in args {
+            writeln!(f, "{}", arg)?;
+        }
+
+        f.flush()?;
+
+        let mut f = f.into_inner()?;
+        f.flush()?;
+        f.sync_all()
+    })()
+    .unwrap_or_else(|e| {
+        panic!(
+            "{}: can't write to candidate: {}, error: {}",
+            program,
+            candidate.display(),
+            e
+        )
+    });
+
+    // Create a file used by some tests.
+    let path = &out_dir.join("libfoo.a");
+    File::create(path).unwrap_or_else(|e| {
+        panic!(
+            "{}: can't create libfoo.a: {}, error: {}",
+            program,
+            path.display(),
+            e
+        )
+    });
+}