[meson] added options: reproducible and source-date-epoch for reproducible builds

Usage example:
-Dreproducible=true \
-Dsource-date-epoch=$(git log -1 --pretty=%ct)

config2.h.in

@@ -196,6 +196,9 @@
 /* Define if you want: Pod2HTML support */
 #mesondefine CONFIG_POD2HTML
 
+/* Define if you want: Reproducible build */
+#mesondefine CONFIG_REPRODUCIBLE
+
 /* Define if you want: QuickJS support */
 #mesondefine CONFIG_QUICKJS
 

doc/meson.build

@@ -10,6 +10,12 @@ xmlto = find_program('xmlto', required: false)
 perl_html = []
 perl_hooks_html = []
 
+if conf_data.get('CONFIG_REPRODUCIBLE')
+    asciidoc_env = ['LC_ALL=C', 'LANGUAGE=en', 'CONFIG_REPRODUCIBLE=1', 'SOURCE_DATE_EPOCH='+conf_data.get('SOURCE_DATE_EPOCH')]
+else
+    asciidoc_env = []
+endif
+
 if pod2html.found()
     perl_html = custom_target('perl.html',
               input: ['perl.pod'],
@@ -68,6 +74,7 @@ elinks_1_html = custom_target('elinks.1.html',
                 input: 'elinks.1.txt',
                 output: 'elinks.1.html',
                 depends: option_command_frag_xhtml,
+                env: asciidoc_env,
                 command: [meson.current_source_dir() + '/tools/asciidoc/asciidoc.py',
                 '--no-conf', '-f', meson.current_source_dir() + '/tools/asciidoc/asciidoc.conf',
                 '-f', meson.current_source_dir() + '/tools/asciidoc/xhtml11.conf',
@@ -81,6 +88,7 @@ elinks_conf_5_html = custom_target('elinks.conf.5.html',
                 input: 'elinks.conf.5.txt',
                 output: 'elinks.conf.5.html',
                 depends: option_config_frag_xhtml,
+                env: asciidoc_env,
                 command: [meson.current_source_dir() + '/tools/asciidoc/asciidoc.py',
                 '--no-conf', '-f', meson.current_source_dir() + '/tools/asciidoc/asciidoc.conf',
                 '-f', meson.current_source_dir() + '/tools/asciidoc/xhtml11.conf',
@@ -94,6 +102,7 @@ elinkskeys_5_html = custom_target('elinkskeys.5.html',
                 input: 'elinkskeys.5.txt',
                 output: 'elinkskeys.5.html',
                 depends: [keymap_actions_txt, keymap_defaults_txt],
+                env: asciidoc_env,
                 command: [meson.current_source_dir() + '/tools/asciidoc/asciidoc.py',
                 '--no-conf', '-f', meson.current_source_dir() + '/tools/asciidoc/asciidoc.conf',
                 '-f', meson.current_source_dir() + '/tools/asciidoc/xhtml11.conf',
@@ -106,6 +115,7 @@ elinkskeys_5_html = custom_target('elinkskeys.5.html',
 hacking_html = custom_target('hacking.html',
                 input: 'hacking.txt',
                 output: 'hacking.html',
+                env: asciidoc_env,
                 command: [meson.current_source_dir() + '/tools/asciidoc/asciidoc.py',
                 '--no-conf', '-f', meson.current_source_dir() + '/tools/asciidoc/asciidoc.conf',
                 '-f', meson.current_source_dir() + '/tools/asciidoc/xhtml11.conf',
@@ -119,6 +129,7 @@ manual_html = custom_target('manual.html',
                 input: 'manual.txt',
                 output: 'manual.html',
                 depends: features_txt,
+                env: asciidoc_env,
                 command: [meson.current_source_dir() + '/tools/asciidoc/asciidoc.py',
                 '--no-conf', '-f', meson.current_source_dir() + '/tools/asciidoc/asciidoc.conf',
                 '-f', meson.current_source_dir() + '/tools/asciidoc/xhtml11.conf',
@@ -132,6 +143,7 @@ elinks_1_xml = custom_target('elinks.1.xml',
                 input: 'elinks.1.txt',
                 output: 'elinks.1.xml',
                 depends: option_command_frag_xml,
+                env: asciidoc_env,
                 command: [meson.current_source_dir() + '/tools/asciidoc/asciidoc.py',
                 '--no-conf', '-f', meson.current_source_dir() + '/tools/asciidoc/asciidoc.conf',
                 '-f', meson.current_source_dir() + '/tools/asciidoc/docbook.conf',
@@ -146,6 +158,7 @@ elinks_conf_5_xml = custom_target('elinks.conf.5.xml',
                 input: 'elinks.conf.5.txt',
                 output: 'elinks.conf.5.xml',
                 depends: option_config_frag_xml,
+                env: asciidoc_env,
                 command: [meson.current_source_dir() + '/tools/asciidoc/asciidoc.py',
                 '--no-conf', '-f', meson.current_source_dir() + '/tools/asciidoc/asciidoc.conf',
                 '-f', meson.current_source_dir() + '/tools/asciidoc/docbook.conf',
@@ -160,6 +173,7 @@ elinkskeys_5_xml = custom_target('elinkskeys.5.xml',
                 input: 'elinkskeys.5.txt',
                 output: 'elinkskeys.5.xml',
                 depends: [keymap_actions_txt, keymap_defaults_txt],
+                env: asciidoc_env,
                 command: [meson.current_source_dir() + '/tools/asciidoc/asciidoc.py',
                 '--no-conf', '-f', meson.current_source_dir() + '/tools/asciidoc/asciidoc.conf',
                 '-f', meson.current_source_dir() + '/tools/asciidoc/docbook.conf',
@@ -173,6 +187,7 @@ elinkskeys_5_xml = custom_target('elinkskeys.5.xml',
 hacking_xml = custom_target('hacking.xml',
                 input: 'hacking.txt',
                 output: 'hacking.xml',
+                env: asciidoc_env,
                 command: [meson.current_source_dir() + '/tools/asciidoc/asciidoc.py',
                 '--no-conf', '-f', meson.current_source_dir() + '/tools/asciidoc/asciidoc.conf',
                 '-f', meson.current_source_dir() + '/tools/asciidoc/docbook.conf',
@@ -186,6 +201,7 @@ manual_xml = custom_target('manual.xml',
                 input: 'manual.txt',
                 output: 'manual.xml',
                 depends: features_txt,
+                env: asciidoc_env,
                 command: [meson.current_source_dir() + '/tools/asciidoc/asciidoc.py',
                 '--no-conf', '-f', meson.current_source_dir() + '/tools/asciidoc/asciidoc.conf',
                 '-f', meson.current_source_dir() + '/tools/asciidoc/docbook.conf',

doc/tools/asciidoc/asciidoc.py

@@ -1061,6 +1061,12 @@ class Document:
         self.safe = True        # Default safe mode.
     def init_attrs(self):
         # Set implicit attributes.
+        if os.environ.get('CONFIG_REPRODUCIBLE', ''):
+            d = time.gmtime(int(os.environ.get('SOURCE_DATE_EPOCH', time.time())))
+            self.attributes['localdate'] = time.strftime('%d-%b-%Y',d)
+            s = time.strftime('%H:%M:%S %z',d)
+            self.attributes['localtime'] = s
+        else:
             d = time.localtime(time.time())
             self.attributes['localdate'] = time.strftime('%d-%b-%Y',d)
             s = time.strftime('%H:%M:%S',d)

meson.build

@@ -74,6 +74,9 @@ conf_data.set('CONFIG_SCRIPTING_GUILE', get_option('guile'))
 conf_data.set('CONFIG_SCRIPTING_PERL', get_option('perl'))
 conf_data.set('CONFIG_SCRIPTING_PYTHON', get_option('python'))
 
+conf_data.set('CONFIG_REPRODUCIBLE', get_option('reproducible'))
+conf_data.set('SOURCE_DATE_EPOCH', get_option('source-date-epoch'))
+
 luapkg = get_option('luapkg')
 if luapkg != ''
     conf_data.set('CONFIG_SCRIPTING_LUA', true)

meson_options.txt

@@ -65,3 +65,6 @@ option('gemini', type: 'boolean', value: false, description: 'gemini protocol su
 option('gettext', type: 'boolean', value: false, description: 'use external gettext library')
 option('quickjs', type: 'boolean', value: false, description: 'use quickjs library')
 option('static', type: 'boolean', value: false, description: 'link static binary')
+
+option('reproducible', type: 'boolean', value: false, description: 'reproducible build')
+option('source-date-epoch', type: 'string', value: '', description: 'source date epoch for reproducible builds')

src/main/version.c

@@ -124,9 +124,10 @@ get_dyn_full_version(struct terminal *term, int more)
 	}
 
 	add_char_to_string(&string, '\n');
+#ifndef CONFIG_REPRODUCIBLE
 	add_format_to_string(&string, _("Built on %s %s", term),
 			     build_date, build_time);
-
+#endif
 	if (more) {
 		add_to_string(&string, "\n\n");
 		add_to_string(&string, _("Text WWW browser", term));

src/vernum.c

@@ -8,6 +8,8 @@
 
 #include "vernum.h"
 
+#ifndef CONFIG_REPRODUCIBLE
 const char *build_date = __DATE__;
 const char *build_time = __TIME__;
+#endif
 const char *build_id = BUILD_ID;