egl: rewrite entrypoints check

Part of the effort to replace shell scripts with portable python scripts.
I could've used a trivial `assert lines == sorted(lines)`, but this way
the caller is shown which entrypoint is out of order.

Signed-off-by: Eric Engestrom <[email protected]>
Reviewed-by Dylan Baker <[email protected]>
Reviewed-by: Emil Velikov <[email protected]>

src/egl/egl-entrypoint-check.py

@@ -0,0 +1,36 @@
+#!/usr/bin/env python
+
+import argparse
+
+PREFIX = 'EGL_ENTRYPOINT('
+SUFFIX = ')'
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('header')
+    args = parser.parse_args()
+
+    with open(args.header) as header:
+        lines = header.readlines()
+
+    entrypoints = []
+    for line in lines:
+        line = line.strip()
+        if line.startswith(PREFIX):
+            assert line.endswith(SUFFIX)
+            entrypoints.append(line[len(PREFIX):-len(SUFFIX)])
+
+    print('Checking EGL API entrypoints are sorted')
+
+    for i, _ in enumerate(entrypoints):
+        # Can't compare the first one with the previous
+        if i == 0:
+            continue
+        if entrypoints[i - 1] > entrypoints[i]:
+            print('ERROR: ' + entrypoints[i] + ' should come before ' + entrypoints[i - 1])
+            exit(1)
+
+    print('All good :)')
+
+if __name__ == '__main__':
+    main()

src/egl/meson.build

@@ -208,8 +208,8 @@ if with_tests and prog_nm.found()
     suite : ['egl'],
   )
   test('egl-entrypoint-check',
-    find_program('egl-entrypoint-check'),
-    env : ['srcdir=' + meson.current_source_dir()],
+    prog_python,
+    args : files('egl-entrypoint-check.py', 'main/eglentrypoint.h'),
     suite : ['egl'],
   )
 endif