From cbce28a348ebb5db646cfc5cd3305c6bce80e915 Mon Sep 17 00:00:00 2001
From: DJMcNab <36049421+DJMcNab@users.noreply.github.com>
Date: Sun, 9 Dec 2018 12:27:13 +0000
Subject: Reimplement format-hook using a rust binary

---
 crates/tools/src/bin/pre-commit.rs | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 crates/tools/src/bin/pre-commit.rs

(limited to 'crates/tools/src/bin/pre-commit.rs')

diff --git a/crates/tools/src/bin/pre-commit.rs b/crates/tools/src/bin/pre-commit.rs
new file mode 100644
index 000000000..ca1909479
--- /dev/null
+++ b/crates/tools/src/bin/pre-commit.rs
@@ -0,0 +1,37 @@
+use std::{
+    process::{Command},
+};
+
+use tools::{Result, run_rustfmt, run, project_root};
+use failure::bail;
+
+fn main() -> tools::Result<()> {
+    run_rustfmt(tools::Overwrite)?;
+    update_staged()
+}
+
+fn update_staged() -> Result<()> {
+    let root = project_root();
+    let output = Command::new("git")
+        .arg("diff")
+        .arg("--name-only")
+        .arg("--cached")
+        .current_dir(&root)
+        .output()?;
+    if !output.status.success() {
+        bail!(
+            "`git diff --name-only --cached` exited with {}",
+            output.status
+        );
+    }
+    for line in String::from_utf8(output.stdout)?.lines() {
+        run(
+            &format!(
+                "git update-index --add {}",
+                root.join(line).to_string_lossy()
+            ),
+            ".",
+        )?;
+    }
+    Ok(())
+}
-- 
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