scripts/build-local.py: Allow use of ccache

When doing continuous builds of a matrix, ccache can help speed up
rebuilds.

Signed-off-by: Nathan Chancellor <nathan@kernel.org>

scripts/build-local.py

@@ -14,6 +14,7 @@
 NORMAL = '\033[0m'
 RED = '\033[01;31m'
 GREEN = '\033[01;32m'
+YELLOW = '\033[01;33m'
 
 
 def interrupt_handler(_signum, _frame):
@@ -46,6 +47,10 @@ def interrupt_handler(_signum, _frame):
                     '--build-dir',
                     default=default_build_dir,
                     help=f"Build folder (default: {default_build_dir})")
+parser.add_argument('-c',
+                    '--ccache',
+                    action='store_true',
+                    help='Use ccache if it is available')
 parser.add_argument('-C',
                     '--directory',
                     help='Path to kernel source',
@@ -86,6 +91,15 @@ def interrupt_handler(_signum, _frame):
 else:
     runtime = None
 
+wrapper = None
+if args.ccache:
+    if shutil.which('ccache'):
+        wrapper = 'ccache'
+    else:
+        print(
+            f"{YELLOW}ccache was requested but it is not installed, ignoring...{NORMAL}"
+        )
+
 # Combine all jobs into one object for easy iteration
 jobs = {}
 for file_str in args.files:
@@ -162,6 +176,7 @@ def interrupt_handler(_signum, _frame):
                                      quiet=(not args.verbose),
                                      runtime=runtime,
                                      tree=tree,
+                                     wrapper=wrapper,
                                      **build)
 
         if all(info.passed for info in result.status.values()):