Convert test-launcher into a generic asan-launcher so that it can be used to run kitty as well

.gitignore

@@ -5,7 +5,7 @@ tags
 build
 linux-package
 logo/*.iconset
-test-launcher
+asan-launcher
 kitty-profile
 dev
 __pycache__

.travis.yml

@@ -114,9 +114,8 @@ install: |
 before_script:
     - echo $LD_LIBRARY_PATH
     - $PYTHON setup.py build --debug $SANITIZE_ARG;
-    - if [[ "$TRAVIS_OS_NAME" != 'osx' ]]; then ldd ./test-launcher `which $PYTHON`; fi
 
 script:
-    - ./test-launcher
+    - if [[ -z $SANITIZE_ARG ]]; then $PYTHON test.py; else ./asan-launcher test; fi
     - if [[ "$RUN_FLAKE" == "1" ]]; then flake8 --count .; fi
     - if [[ "$BUILD_PKG" == "1" ]]; then $PYTHON setup.py linux-package; fi

asan-launcher.c

@@ -0,0 +1,17 @@
+/*
+ * linux-launcher.c
+ * Copyright (C) 2017 Kovid Goyal <kovid at kovidgoyal.net>
+ *
+ * Distributed under terms of the GPL3 license.
+ */
+
+#include <Python.h>
+
+#define MAX_ARGC 1024
+
+int main(int argc, char *argv[]) {
+    wchar_t *argvw[MAX_ARGC + 1] = {0};
+    argvw[0] = L"kitty";
+    for (int i = 1; i < argc; i++) argvw[i] = Py_DecodeLocale(argv[i], NULL);
+    return Py_Main(argc, argvw);
+}

setup.py

@@ -333,15 +333,17 @@ def safe_makedirs(path):
     os.makedirs(path, exist_ok=True)
 
 
-def build_test_launcher(args):
+def build_asan_launcher(args):
+    dest = 'asan-launcher'
+    src = 'asan-launcher.c'
+    if args.incremental and not newer(dest, src):
+        return
     cc, ccver = cc_version()
     cflags = '-g -Wall -Werror -fpie'.split()
     pylib = get_python_flags(cflags)
-    sanitize_lib = (['-lasan'] if cc == 'gcc' else []) if args.sanitize else []
-    cflags.extend(get_sanitize_args(cc, ccver) if args.sanitize else [])
-    cmd = [cc] + cflags + [
-        'test-launcher.c', '-o', 'test-launcher',
-    ] + sanitize_lib + pylib
+    sanitize_lib = ['-lasan'] if cc == 'gcc' else []
+    cflags.extend(get_sanitize_args(cc, ccver))
+    cmd = [cc] + cflags + [src, '-o', dest] + sanitize_lib + pylib
     run_tool(cmd)
 
 
@@ -444,7 +446,7 @@ def main():
     os.chdir(os.path.dirname(os.path.abspath(__file__)))
     if args.action == 'build':
         build(args)
-        build_test_launcher(args)
+        build_asan_launcher(args)
         if args.profile:
             build_linux_launcher(args)
             print('kitty profile executable is', 'kitty-profile')

test-launcher.c

@@ -1,13 +0,0 @@
-/*
- * linux-launcher.c
- * Copyright (C) 2017 Kovid Goyal <kovid at kovidgoyal.net>
- *
- * Distributed under terms of the GPL3 license.
- */
-
-#include <Python.h>
-
-int main(int argc, char *argv[]) {
-    wchar_t *wargv[2] = {L"kitty-test", L"test.py"};
-    return Py_Main(2, wargv);
-}