push sheeet

pkgs/by-name/ba/bazel_8/build-support/bazelDerivation.nix

@@ -0,0 +1,74 @@
+{
+  stdenv,
+  lndir,
+  lib,
+}:
+
+args@{
+  bazel,
+  registry ? null,
+  bazelRepoCache ? null,
+  bazelVendorDeps ? null,
+  startupArgs ? [ ],
+  commandArgs ? [ ],
+  bazelPreBuild ? "",
+  bazelPostBuild ? "",
+  serverJavabase ? null,
+  targets,
+  command,
+  ...
+}:
+
+stdenv.mkDerivation (
+  {
+    preBuildPhases = [ "preBuildPhase" ];
+    preBuildPhase =
+      (lib.optionalString (bazelRepoCache != null) ''
+        # repo_cache needs to be writeable even in air-gapped builds
+        mkdir repo_cache
+        ${lndir}/bin/lndir -silent ${bazelRepoCache}/repo_cache repo_cache
+      '')
+
+      + (lib.optionalString (bazelVendorDeps != null) ''
+        mkdir vendor_dir
+        ${lndir}/bin/lndir -silent ${bazelVendorDeps}/vendor_dir vendor_dir
+
+        # pin all deps to avoid re-fetch attempts by Bazel
+        rm vendor_dir/VENDOR.bazel
+        find vendor_dir -mindepth 1 -maxdepth 1 -type d -printf "pin(\"@@%P\")\n" > vendor_dir/VENDOR.bazel
+      '')
+      # keep preBuildPhase always defined as it is listed in preBuildPhases
+      + ''
+        true
+      '';
+    buildPhase = ''
+      runHook preBuild
+
+      export HOME=$(mktemp -d)
+
+      ${bazelPreBuild}
+
+      ${bazel}/bin/bazel ${
+        lib.escapeShellArgs (
+          lib.optional (serverJavabase != null) "--server_javabase=${serverJavabase}"
+          ++ [ "--batch" ]
+          ++ startupArgs
+        )
+      } ${command} ${
+        lib.escapeShellArgs (
+          lib.optional (registry != null) "--registry=file://${registry}"
+          ++ lib.optional (bazelRepoCache != null) "--repository_cache=repo_cache"
+          ++ lib.optional (bazelVendorDeps != null) "--vendor_dir=vendor_dir"
+          ++ commandArgs
+          ++ targets
+        )
+      }
+
+      ${bazelPostBuild}
+
+      runHook postBuild
+    '';
+
+  }
+  // args
+)

pkgs/by-name/ba/bazel_8/build-support/bazelPackage.nix

@@ -0,0 +1,164 @@
+{
+  callPackage,
+  gnugrep,
+  lib,
+  autoPatchelfHook,
+  stdenv,
+}:
+
+{
+  name,
+  src,
+  sourceRoot ? null,
+  version ? null,
+  targets,
+  bazel,
+  startupArgs ? [ ],
+  commandArgs ? [ ],
+  env ? { },
+  serverJavabase ? null,
+  registry ? null,
+  bazelRepoCacheFOD ? {
+    outputHash = null;
+    outputHashAlgo = "sha256";
+  },
+  bazelVendorDepsFOD ? {
+    outputHash = null;
+    outputHashAlgo = "sha256";
+  },
+  installPhase,
+  buildInputs ? [ ],
+  nativeBuildInputs ? [ ],
+  autoPatchelfIgnoreMissingDeps ? null,
+}:
+let
+  # FOD produced by `bazel fetch`
+  # Repo cache contains content-addressed external Bazel dependencies without any patching
+  # Potentially this can be nixified via --experimental_repository_resolved_file
+  # (Note: file itself isn't reproducible because it has lots of extra info and order
+  #        isn't stable too. Parsing it into nix fetch* commands isn't trivial but might be possible)
+  bazelRepoCache =
+    if bazelRepoCacheFOD.outputHash == null then
+      null
+    else
+      (callPackage ./bazelDerivation.nix { } {
+        name = "bazelRepoCache";
+        inherit (bazelRepoCacheFOD) outputHash outputHashAlgo;
+        inherit
+          src
+          version
+          sourceRoot
+          env
+          buildInputs
+          nativeBuildInputs
+          ;
+        inherit registry;
+        inherit
+          bazel
+          targets
+          startupArgs
+          serverJavabase
+          ;
+        command = "fetch";
+        outputHashMode = "recursive";
+        commandArgs = [ "--repository_cache=repo_cache" ] ++ commandArgs;
+        bazelPreBuild = ''
+          mkdir repo_cache
+        '';
+        installPhase = ''
+          mkdir -p $out/repo_cache
+          cp -r --reflink=auto repo_cache/* $out/repo_cache
+        '';
+      });
+  # Stage1: FOD produced by `bazel vendor`, Stage2: eventual patchelf or other tuning
+  # Vendor deps contains unpacked&patches external dependencies, this may need Nix-specific
+  # patching to address things like
+  # - broken symlinks
+  # - symlinks or other references to absolute nix store paths which isn't allowed for FOD
+  # - autoPatchelf for externally-fetched binaries
+  #
+  # Either repo cache or vendor deps should be enough to build a given package
+  bazelVendorDeps =
+    if bazelVendorDepsFOD.outputHash == null then
+      null
+    else
+      (
+        let
+          stage1 = callPackage ./bazelDerivation.nix { } {
+            name = "bazelVendorDepsStage1";
+            inherit (bazelVendorDepsFOD) outputHash outputHashAlgo;
+            inherit
+              src
+              version
+              sourceRoot
+              env
+              buildInputs
+              nativeBuildInputs
+              ;
+            inherit registry;
+            inherit
+              bazel
+              targets
+              startupArgs
+              serverJavabase
+              ;
+            dontFixup = true;
+            command = "vendor";
+            outputHashMode = "recursive";
+            commandArgs = [ "--vendor_dir=vendor_dir" ] ++ commandArgs;
+            bazelPreBuild = ''
+              mkdir vendor_dir
+            '';
+            bazelPostBuild = ''
+              # remove symlinks that point to locations under bazel_src/
+              find vendor_dir -type l -lname "$HOME/*" -exec rm '{}' \;
+              # remove symlinks to temp build directory on darwin
+              find vendor_dir -type l -lname "/private/var/tmp/*" -exec rm '{}' \;
+              # remove broken symlinks
+              find vendor_dir -xtype l -exec rm '{}' \;
+
+              # remove .marker files referencing NIX_STORE as those references aren't allowed in FOD
+              (${gnugrep}/bin/grep -rI "$NIX_STORE/" vendor_dir --files-with-matches --include="*.marker" --null || true) \
+                | xargs -0 --no-run-if-empty rm
+            '';
+            installPhase = ''
+              mkdir -p $out/vendor_dir
+              cp -r --reflink=auto vendor_dir/* $out/vendor_dir
+            '';
+
+          };
+        in
+        stdenv.mkDerivation {
+          name = "bazelVendorDeps";
+          buildInputs = lib.optional (!stdenv.hostPlatform.isDarwin) autoPatchelfHook ++ buildInputs;
+          inherit autoPatchelfIgnoreMissingDeps;
+          src = stage1;
+          installPhase = ''
+            cp -r . $out
+          '';
+        }
+      );
+
+  package = callPackage ./bazelDerivation.nix { } {
+    inherit
+      name
+      src
+      version
+      sourceRoot
+      env
+      buildInputs
+      nativeBuildInputs
+      ;
+    inherit registry bazelRepoCache bazelVendorDeps;
+    inherit
+      bazel
+      targets
+      startupArgs
+      serverJavabase
+      commandArgs
+      ;
+    inherit installPhase;
+    command = "build";
+  };
+in
+package // { passthru = { inherit bazelRepoCache bazelVendorDeps; }; }

pkgs/by-name/ba/bazel_8/build-support/patching.nix

@@ -0,0 +1,24 @@
+{
+  stdenv,
+}:
+{
+  # If there's a need to patch external dependencies managed by Bazel
+  # one option is to configure patches on Bazel level. Bazel doesn't
+  # allow patches to be in absolute paths so this helper will produce
+  # sources patch that adds given file to given location
+  addFilePatch =
+    {
+      path,
+      file,
+    }:
+    stdenv.mkDerivation {
+      name = "add_file.patch";
+      dontUnpack = true;
+      buildPhase = ''
+        mkdir -p $(dirname "${path}")
+        cp ${file} "${path}"
+        diff -u /dev/null "${path}" >result.patch || true  # diff exit code is non-zero if there's a diff
+      '';
+      installPhase = ''cp result.patch $out'';
+    };
+}