Merge changes from topic "releng" into main

* changes:
  Add meson release note
  Move version to a JSON file so we can have release names
  Remove rl-next-dev

.version

@@ -1 +0,0 @@
-2.90.0

doc/manual/rl-next/build-timing-analysis.md

@@ -1,11 +1,13 @@
 ---
 synopsis: Clang build timing analysis
 cls: 587
+category: Development
 ---
 
 We now have Clang build profiling available, which generates Chrome
 tracing files for each compilation unit. To enable it, run `meson configure
-build -Dprofile-build=enabled` then rerun the compilation.
+build -Dprofile-build=enabled` in a Clang stdenv (`nix develop
+.#native-clangStdenvPackages`) then rerun the compilation.
 
 If you want to make the build go faster, do a clang build with meson, then run
 `maintainers/buildtime_report.sh build`, then contemplate how to improve the
@@ -13,3 +15,8 @@ build time.
 
 You can also look at individual object files' traces in
 <https://ui.perfetto.dev>.
+
+See [the wiki page][improving-build-times-wiki] for more details on how to do
+this.
+
+[improving-build-times-wiki]: https://wiki.lix.systems/link/8#bkmrk-page-title

doc/manual/rl-next/meson.md

@@ -0,0 +1,15 @@
+---
+synopsis: Lix is built with meson
+# and many more
+cls: [580, 627, 628, 707, 711, 712, 719]
+credits: [Qyriad, horrors, jade, 9999years, winter]
+category: Packaging
+---
+
+Lix is built exclusively with the meson build system thanks to a huge team-wide
+effort, and the legacy `make`/`autoconf` based build system has been removed
+altogether. This improves maintainability of Lix, enables things like saving
+20% of compile times with precompiled headers, and generally makes the build
+less able to produce obscure incremental compilation bugs.
+
+Non-Nix-based downstream packaging needs rewriting accordingly.

docker.nix

@@ -1,7 +1,7 @@
 {
   pkgs ? import <nixpkgs> { },
   lib ? pkgs.lib,
-  name ? "nix",
+  name ? "lix",
   tag ? "latest",
   bundleNixpkgs ? true,
   channelName ? "nixpkgs",

flake.nix

@@ -59,7 +59,6 @@
       # Set to true to build the release notes for the next release.
       buildUnreleasedNotes = true;
 
-      version = lib.fileContents ./.version + versionSuffix;
       versionSuffix =
         if officialRelease then
           ""
@@ -149,8 +148,7 @@
         }
       );
 
-      binaryTarball =
+      binaryTarball = nix: pkgs: pkgs.callPackage ./nix-support/binary-tarball.nix { inherit nix; };
-        nix: pkgs: pkgs.callPackage ./nix-support/binary-tarball.nix { inherit nix version; };
 
       overlayFor =
         getStdenv: final: prev:
@@ -227,7 +225,6 @@
           in
           {
             user = rl-next-check "rl-next" ./doc/manual/rl-next;
-            dev = rl-next-check "rl-next-dev" ./doc/manual/rl-next-dev;
           }
         );
 
@@ -309,7 +306,6 @@
           perlBindings = self.hydraJobs.perlBindings.${system};
           nixpkgsLibTests = self.hydraJobs.tests.nixpkgsLibTests.${system};
           rl-next = self.hydraJobs.rl-next.${system}.user;
-          rl-next-dev = self.hydraJobs.rl-next.${system}.dev;
           # Will be empty attr set on i686-linux, and filtered out by forAvailableSystems.
           pre-commit = self.hydraJobs.pre-commit.${system};
         }
@@ -332,10 +328,10 @@
                 pkgs = nixpkgsFor.${system}.native;
                 image = import ./docker.nix {
                   inherit pkgs;
-                  tag = version;
+                  tag = pkgs.nix.version;
                 };
               in
-              pkgs.runCommand "docker-image-tarball-${version}"
+              pkgs.runCommand "docker-image-tarball-${pkgs.nix.version}"
                 { meta.description = "Docker image with Lix for ${system}"; }
                 ''
                   mkdir -p $out/nix-support

maintainers/build-release-notes.py

@@ -1,6 +1,5 @@
 from collections import defaultdict
 import frontmatter
-import sys
 import pathlib
 import textwrap
 from typing import Any, Tuple
@@ -27,6 +26,7 @@ CATEGORIES = [
     'Improvements',
     'Fixes',
     'Packaging',
+    'Development',
     'Miscellany',
 ]
 

meson.build

@@ -39,7 +39,7 @@
 # in the build directory.
 
 project('lix', 'cpp',
-  version : run_command('bash', '-c', 'echo -n $(cat ./.version)$VERSION_SUFFIX', check : true).stdout().strip(),
+  version : run_command('bash', '-c', 'echo -n $(jq -r .version < ./version.json)$VERSION_SUFFIX', check : true).stdout().strip(),
   default_options : [
     'cpp_std=c++2a',
     # TODO(Qyriad): increase the warning level

misc/pre-commit.nix

@@ -63,7 +63,7 @@ pre-commit-run {
       files = ''^doc/manual/(change-authors\.yml|rl-next(-dev)?)'';
       pass_filenames = false;
       entry = ''
-        ${lib.getExe pkgs.build-release-notes} --change-authors doc/manual/change-authors.yml doc/manual/rl-next doc/manual/rl-next-dev
+        ${lib.getExe pkgs.build-release-notes} --change-authors doc/manual/change-authors.yml doc/manual/rl-next
       '';
     };
     change-authors-sorted = {

nix-support/binary-tarball.nix

@@ -3,7 +3,6 @@
   cacert,
   nix,
   system,
-  version,
 }:
 let
   installerClosureInfo = buildPackages.closureInfo {
@@ -15,10 +14,10 @@ let
 
   meta.description = "Distribution-independent Lix bootstrap binaries for ${system}";
 in
-buildPackages.runCommand "lix-binary-tarball-${version}" { inherit meta; } ''
+buildPackages.runCommand "lix-binary-tarball-${nix.version}" { inherit meta; } ''
   cp ${installerClosureInfo}/registration $TMPDIR/reginfo
 
-  dir=lix-${version}-${system}
+  dir=lix-${nix.version}-${system}
   fn=$out/$dir.tar.xz
   mkdir -p $out/nix-support
   echo "file binary-dist $fn" >> $out/nix-support/hydra-build-products

package.nix

@@ -88,7 +88,8 @@ let
   inherit (lib) fileset;
   inherit (stdenv) hostPlatform buildPlatform;
 
-  version = lib.fileContents ./.version + versionSuffix;
+  versionJson = builtins.fromJSON (builtins.readFile ./version.json);
+  version = versionJson.version + versionSuffix;
 
   aws-sdk-cpp-nix = aws-sdk-cpp.override {
     apis = [
@@ -138,7 +139,7 @@ let
   # that would interfere with repo semantics.
   baseFiles = fileset.fileFilter (f: f.name != ".gitignore") ./.;
 
-  configureFiles = fileset.unions [ ./.version ];
+  configureFiles = fileset.unions [ ./version.json ];
 
   topLevelBuildFiles = fileset.unions ([
     ./meson.build

perl/default.nix

@@ -23,7 +23,7 @@ perl.pkgs.toPerlModule (
     src = fileset.toSource {
       root = ../.;
       fileset = fileset.unions ([
-        ../.version
+        ../version.json
         ./lib
         ./meson.build
       ]);

perl/meson.build

@@ -1,5 +1,5 @@
 project('lix-perl', 'cpp',
-  version : run_command('bash', '-c', 'echo -n $(cat ../.version)$VERSION_SUFFIX', check : true).stdout().strip(),
+  version : run_command('bash', '-c', 'echo -n $(jq -r .version < ../version.json)$VERSION_SUFFIX', check : true).stdout().strip(),
   default_options : [
     'cpp_std=c++2a',
     # TODO(Qyriad): increase the warning level

version.json

@@ -0,0 +1,4 @@
+{
+    "version": "2.90.0",
+    "release_name": "Vanilla Ice Cream"
+}