[dev] Make licence header check more friendly

Previously, it could not be used after the guests were built, due to
some extra generated files.

Signed-off-by: Lucy Menon <168595099+syntactically@users.noreply.github.com>

Author: syntactically

Justfile

@@ -101,6 +101,12 @@ like-ci config=default-target hypervisor="kvm":
     @# Ensure up-to-date Cargo.lock
     cargo fetch --locked
 
+    @# typos
+    typos
+
+    @# check licence headers
+    just check-license-headers
+
     @# fmt
     just fmt-check
 

dev/check-license-headers.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # This script checks for the presence of the required license header in Rust source files.
 
 # Get the repository root
@@ -32,7 +32,12 @@ MISSING_HEADERS=0
 MISSING_FILES=""
 
 # Find all Rust files, excluding target directory
-while IFS= read -r file; do
+while IFS= read -r -d $'\0' file; do
+    # Skip some files which appear when the guests are build
+    if grep -q '^src/tests/rust_guests/[^/]*/target/' <<< "$file"; then
+        continue
+    fi
+
     # Skip auto-generated files
     if grep -q "@generated" "$file" || grep -q "Automatically generated" "$file"; then
         continue
@@ -44,7 +49,7 @@ while IFS= read -r file; do
         MISSING_FILES="$MISSING_FILES\n  $file"
         MISSING_HEADERS=$((MISSING_HEADERS + 1))
     fi
-done < <(find src -name "*.rs" -type f)
+done < <(find src -name "*.rs" -type f -print0)
 
 if [ $MISSING_HEADERS -gt 0 ]; then
     echo "Found $MISSING_HEADERS files with missing or invalid license headers:"
@@ -57,4 +62,4 @@ if [ $MISSING_HEADERS -gt 0 ]; then
 else
     echo "All Rust files have the required license header"
     exit 0
-fi
+fi