build-doc: exit 1 on error, add to release testing

build-doc

@@ -1,2 +1,38 @@
-#!/usr/bin/env bash
-asciidoctor -o out/README.html -v README.adoc
+#!/usr/bin/env python3
+
+import re
+
+import common
+from shell_helpers import LF
+
+class Main(common.LkmcCliFunction):
+    def __init__(self):
+        super().__init__(
+            defaults = {
+                'print_time': False,
+            },
+            description='''\
+https://github.com/cirosantilli/linux-kernel-module-cheat#build-the-documentation
+''',
+        )
+
+    def timed_main(self):
+        self.sh.run_cmd(
+            [
+                'asciidoctor', LF,
+                '-o', self.env['readme_out'], LF,
+                '-v', self.env['readme'], LF,
+            ],
+            out_file=self.env['build_doc_log'],
+        )
+        error_re = re.compile('^asciidoctor: WARNING: ')
+        exit_status = 0
+        with open(self.env['build_doc_log']) as f:
+            for line in f:
+                if error_re.search(line):
+                    exit_status = 1
+                    break
+        return exit_status
+
+if __name__ == '__main__':
+    Main().cli()