Bug 41122: Add var/browser_release_date

Add a release date, and use it for MOZ_BUILD_DATE, and as timestamp on
files in projects/browser.

For nightly we use a release date based on the version number.

.gitlab/issue_templates/Release Prep - Mullvad Browser Alpha.md

@@ -39,6 +39,7 @@ Mullvad Browser Alpha (and Nightly) are on the `main` branch
 - [ ] Update `rbm.conf`
   - [ ] `var/torbrowser_version` : update to next version
   - [ ] `var/torbrowser_build` : update to `$(MULLVAD_BROWSER_BUILD_N)`
+  - [ ] `var/browser_release_date` : update to build date
   - [ ] `var/torbrowser_incremental_from` : update to previous Desktop version
     - **NOTE**: We try to build incrementals for the previous 3 desktop versions except in the case of a watershed update
     - **IMPORTANT**: Really *actually* make sure this is the previous Desktop version or else the `make mullvadbrowser-incrementals-*` step will fail

.gitlab/issue_templates/Release Prep - Tor Browser Alpha.md

@@ -38,6 +38,7 @@ Tor Browser Alpha (and Nightly) are on the `main` branch
 - [ ] Update `rbm.conf`
   - [ ] `var/torbrowser_version` : update to next version
   - [ ] `var/torbrowser_build` : update to `$(TOR_BROWSER_BUILD_N)`
+  - [ ] `var/browser_release_date` : update to build date
   - [ ] ***(Desktop Only)***`var/torbrowser_incremental_from` : update to previous Desktop version
     - **NOTE**: We try to build incrementals for the previous 3 desktop versions except in the case of a watershed update
     - **IMPORTANT**: Really *actually* make sure this is the previous Desktop version or else the `make torbrowser-incrementals-*` step will fail

projects/browser/config

 # vim: filetype=yaml sw=2
 version: '[% c("var/torbrowser_version") %]'
 filename: '[% c("var/project-name") %]-[% c("version") %]-[% c("var/osname") %]-[% c("var/build_id") %]'
+timestamp: '[% c("var/browser_release_date_timestamp") %]'
 container:
   use_container: 1
 

rbm.conf

@@ -79,6 +79,8 @@ var:
     - '13.5a5'
     - '13.5a4'
     - '13.5a3'
+  browser_release_date: '2024/03/28 01:02:03'
+  browser_release_date_timestamp: '[% USE date; date.format(c("var/browser_release_date"), "%s") %]'
   updater_enabled: 1
   build_mar: 1
   mar_channel_id: '[% c("var/projectname") %]-torproject-[% c("var/channel") %]'
@@ -206,7 +208,8 @@ var:
     [% END -%]
 
   DOCSDIR_project: '[% project %]'
-  set_MOZ_BUILD_DATE: 'export MOZ_BUILD_DATE=[% c("var_p/MOZ_BUILD_DATE") %]'
+  set_MOZ_BUILD_DATE: 'export MOZ_BUILD_DATE=[% c("var/MOZ_BUILD_DATE") %]'
+  MOZ_BUILD_DATE: '[% USE date; date.format(c("var/browser_release_date"), "%Y%m%d%H%M%S") %]'
 
   # var/essential_deps is the same as var/deps, except that we never
   # redefine it in projects config. This is for the packages we want to
@@ -248,6 +251,14 @@ targets:
                 GET c("var_p/nightly_torbrowser_version");
            END;
         -%]
+      browser_release_date: |
+        [%
+          IF (matches = c("var/torbrowser_version").match('^tbb-nightly\.(\d\d\d\d)\.(\d\d)\.(\d\d)$'));
+            GET matches.0 _ "/" _ matches.1 _ "/" _ matches.2 _ " 01:01:01";
+          ELSE;
+            GET "2000/01/01 01:01:01";
+          END
+          -%]
       max_torbrowser_incremental_from: 2
       build_infos_json: 1
 
@@ -727,31 +738,5 @@ gpg_allow_expired_keys: 1
         }
         return [@res];
       },
-      MOZ_BUILD_DATE => sub {
-        use POSIX qw(strftime);
-        my ($project, $options) = @_;
-        my $nightly = project_config($project, 'var/nightly', $options);
-        my $testbuild = project_config($project, 'var/testbuild', $options);
-
-        if ($nightly && !$testbuild) {
-          my $torbrowser_version = project_config($project, 'var/torbrowser_version', $options);
-          return sprintf("%d%02d%02d000001", $1, $2, $3)
-            if $torbrowser_version =~ m/^tbb-nightly\.([^\.]+)\.([^\.]+)\.([^\.]+)$/;
-          return strftime("%Y%m%d000001", gmtime);
-        }
-
-        my $timestamp = project_config($project, 'timestamp', $options);
-        if (!$nightly) {
-          my $torbrowser_version = project_config($project, 'var/torbrowser_version', $options);
-          my @n = reverse split /[\.\D]/, $torbrowser_version;
-          my $i = 1;
-          unshift @n, 0 if @n < 3;
-          for my $n (@n) {
-            $timestamp += $n * $i;
-            $i = $i * 10;
-          }
-        }
-        return strftime "%Y%m%d%H%M%S", gmtime($timestamp);
-      },
     },
   )