meson: docs: generate docs timestamp

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Neal Gompa <ngompa13@gmail.com>

docs/Makefile.am

@@ -306,13 +306,6 @@ aclperms.htmlinc: $(top_srcdir)/src/access/viraccessperm.h \
         $(top_srcdir)/scripts/genaclperms.py Makefile.am
 	$(AM_V_GEN)$(RUNUTF8) $(PYTHON) $(top_srcdir)/scripts/genaclperms.py $< > $@
 
-timestamp="$(shell if test -n "$$SOURCE_DATE_EPOCH"; \
-		   then \
-		     date -u --date="@$$SOURCE_DATE_EPOCH"; \
-		   else \
-		     date -u; \
-		   fi)"
-
 hvsupport.html: hvsupport.html.in
 
 hvsupport.html.in: $(top_srcdir)/scripts/hvsupport.py $(api_DATA) \

docs/meson.build

@@ -29,6 +29,10 @@ docs_assets = [
 
 install_data(docs_assets, install_dir: docs_html_dir)
 
+docs_timestamp = run_command(
+  python3_prog, meson_timestamp_prog.path(), env: runutf8
+).stdout().strip()
+
 docs_api_generated = custom_target(
   'generate-api',
   output: [

scripts/meson-timestamp.py

@@ -0,0 +1,13 @@
+#!/usr/bin/env python3
+
+import os
+
+from datetime import datetime, timezone
+
+timestamp = os.environ.get('SOURCE_DATE_EPOCH', None)
+timeformat = '%c %Z'
+
+if timestamp:
+    print(datetime.fromtimestamp(int(timestamp), tz=timezone.utc).strftime(timeformat))
+else:
+    print(datetime.now(tz=timezone.utc).strftime(timeformat))

scripts/meson.build

@@ -23,6 +23,7 @@ scripts = [
   'meson-install-dirs.py',
   'meson-install-symlink.py',
   'meson-python.sh',
+  'meson-timestamp.py',
   'mock-noinline.py',
   'prohibit-duplicate-header.py',
   'test-wrap-argv.py',