1 files changed, 53 insertions, 0 deletions

diff --git a/xtask/src/cmd.rs b/xtask/src/cmd.rs
new file mode 100644
index 000000000..2027f4893
--- /dev/null
+++ b/xtask/src/cmd.rs
@@ -0,0 +1,53 @@
+use std::process::{Command, Output, Stdio};
+
+use anyhow::{Context, Result};
+
+use crate::project_root;
+
+pub struct Cmd<'a> {
+    pub unix: &'a str,
+    pub windows: &'a str,
+    pub work_dir: &'a str,
+}
+
+impl Cmd<'_> {
+    pub fn run(self) -> Result<()> {
+        if cfg!(windows) {
+            run(self.windows, self.work_dir)
+        } else {
+            run(self.unix, self.work_dir)
+        }
+    }
+    pub fn run_with_output(self) -> Result<Output> {
+        if cfg!(windows) {
+            run_with_output(self.windows, self.work_dir)
+        } else {
+            run_with_output(self.unix, self.work_dir)
+        }
+    }
+}
+
+pub fn run(cmdline: &str, dir: &str) -> Result<()> {
+    do_run(cmdline, dir, &mut |c| {
+        c.stdout(Stdio::inherit());
+    })
+    .map(|_| ())
+}
+
+pub fn run_with_output(cmdline: &str, dir: &str) -> Result<Output> {
+    do_run(cmdline, dir, &mut |_| {})
+}
+
+fn do_run(cmdline: &str, dir: &str, f: &mut dyn FnMut(&mut Command)) -> Result<Output> {
+    eprintln!("\nwill run: {}", cmdline);
+    let proj_dir = project_root().join(dir);
+    let mut args = cmdline.split_whitespace();
+    let exec = args.next().unwrap();
+    let mut cmd = Command::new(exec);
+    f(cmd.args(args).current_dir(proj_dir).stderr(Stdio::inherit()));
+    let output = cmd.output().with_context(|| format!("running `{}`", cmdline))?;
+    if !output.status.success() {
+        anyhow::bail!("`{}` exited with {}", cmdline, output.status);
+    }
+    Ok(output)
+}