ci: Move lints into xtask

Honestly just to reduce the code statistics; be nice to have
zero shell script in the repo 😃

Signed-off-by: Colin Walters <walters@verbum.org>

.github/workflows/ci.yml

@@ -21,8 +21,6 @@ jobs:
     container: quay.io/coreos-assembler/fcos-buildroot:testing-devel
     steps:
       - uses: actions/checkout@v3
-      - name: Code lints
-        run: ./ci/lints.sh
       - name: Install deps
         run: ./ci/installdeps.sh
       # xref containers/containers-image-proxy-rs
@@ -34,6 +32,8 @@ jobs:
         run: cargo test --no-run
       - name: Individual checks
         run: (cd cli && cargo check) && (cd lib && cargo check)
+      - name: Lints
+        run: cargo xtask custom-lints
       - name: Run tests
         run: cargo test -- --nocapture --quiet
       - name: Manpage generation

xtask/src/xtask.rs

@@ -1,5 +1,5 @@
 use std::fs::File;
-use std::io::{BufRead, BufReader, BufWriter, Write};
+use std::io::{BufRead, BufReader, BufWriter, Cursor, Write};
 use std::process::{Command, Stdio};
 
 use anyhow::{Context, Result};
@@ -12,23 +12,25 @@ const VENDORPATH: &str = "target/vendor.tar.zstd";
 
 fn main() {
     if let Err(e) = try_main() {
-        eprintln!("{e:?}");
+        eprintln!("error: {e:?}");
         std::process::exit(1);
     }
 }
 
-const TASKS: &[(&'static str, fn(&Shell) -> Result<()>)] = &[
+#[allow(clippy::type_complexity)]
+const TASKS: &[(&str, fn(&Shell) -> Result<()>)] = &[
     ("vendor", vendor),
     ("package", package),
     ("package-srpm", package_srpm),
+    ("custom-lints", custom_lints),
 ];
 
 fn try_main() -> Result<()> {
     let task = std::env::args().nth(1);
     let sh = xshell::Shell::new()?;
     if let Some(cmd) = task.as_deref() {
         let f = TASKS
-            .into_iter()
+            .iter()
             .find_map(|(k, f)| (*k == cmd).then_some(*f))
             .unwrap_or(print_help);
         f(&sh)?;
@@ -170,6 +172,18 @@ fn package_srpm(sh: &Shell) -> Result<()> {
     Ok(())
 }
 
+fn custom_lints(sh: &Shell) -> Result<()> {
+    // Verify there are no invocations of the dbg macro.
+    let o = cmd!(sh, "git grep dbg\x21 *.rs").ignore_status().read()?;
+    if !o.is_empty() {
+        let mut stderr = std::io::stderr().lock();
+        std::io::copy(&mut Cursor::new(o.as_bytes()), &mut stderr)?;
+        eprintln!();
+        anyhow::bail!("Found dbg\x21 macro");
+    }
+    Ok(())
+}
+
 fn print_help(_sh: &Shell) -> Result<()> {
     println!("Tasks:");
     for (name, _) in TASKS {