Add tool for checking out Linux sources

3 files changed, 86 insertions, 6 deletions

diff --git a/flake.nix b/flake.nix
index 8919c5a..c91c112 100644
--- a/flake.nix
+++ b/flake.nix
@@ -28,7 +28,11 @@
       let
         pkgs = nixpkgs.legacyPackages."${system}";
 
-        linuxCommonDependencies = with pkgs; [
+        kernelDevTools = pkgs.callPackage ./tools.nix {};
+
+        linuxCommonDependencies = [
+          kernelDevTools
+        ] ++ (with pkgs; [
           gnumake
           perl
           bison
@@ -49,13 +53,15 @@
           kmod
           ubootTools
 
-          llvmPackages.bintools
-          llvmPackages.clang
-          llvmPackages.llvm
-
           # For make menuconfig
           ncurses
-        ];
+
+          # For make gtags
+          global
+
+          # For git send-email 🫠
+          gitFull
+        ]);
 
         rust-analyzer = fenix.packages."${system}".rust-analyzer;
 
@@ -86,6 +92,10 @@
 
         devShells.linux_6_8 = pkgs.mkShell {
           packages = [
+            pkgs.llvmPackages.bintools
+            pkgs.llvmPackages.llvm
+            pkgs.llvmPackages.clang
+
             rustc_1_76
             rust-bindgen_0_65_1
             rust-analyzer
@@ -99,6 +109,16 @@
           # kernel will take care of itself.
           NIX_HARDENING_ENABLE = "";
         };
+
+        devShells.linux_6_8_gcc = pkgs.mkShell {
+          packages = [
+            pkgs.gcc
+          ] ++ linuxCommonDependencies;
+
+          # Disable all automatically applied hardening. The Linux
+          # kernel will take care of itself.
+          NIX_HARDENING_ENABLE = "";
+        };
       }
     );
 }
diff --git a/tools.nix b/tools.nix
new file mode 100644
index 0000000..5f90e27
--- /dev/null
+++ b/tools.nix
@@ -0,0 +1,21 @@
+{ stdenvNoCC }:
+stdenvNoCC.mkDerivation {
+  name = "kernel-dev-tools";
+
+  src = ./tools;
+  
+  dontConfigure = true;
+  dontBuild = true;
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/bin
+
+    for script in *; do
+      install -m0555 "$script" $out/bin/
+    done
+
+    runHook preInstall
+  '';
+}
diff --git a/tools/linux-checkout b/tools/linux-checkout
new file mode 100644
index 0000000..7069f07
--- /dev/null
+++ b/tools/linux-checkout
@@ -0,0 +1,39 @@
+#!/bin/sh
+
+set -eu
+
+if [ $# -ne 1 ]; then
+    echo "Usage: $0 output-directory" 1>&2
+    echo
+    echo "Check out a Linux development tree and populates it with typical remotes."
+    exit 1
+fi
+
+OUTDIR=$1
+
+if [ -e "$OUTDIR" ]; then
+    echo "$OUTDIR already exists. Bailing out." 1>&2
+    exit 1
+fi
+
+mkdir -p "$OUTDIR"
+
+pushd "$OUTDIR"
+
+git init --initial-branch=torvalds
+
+git remote add torvalds https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
+git remote add stable https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
+git remote add rust-for-linux https://github.com/Rust-for-Linux/linux.git
+git remote add kvm https://git.kernel.org/pub/scm/virt/kvm/kvm.git
+# Add new remotes here.
+
+echo "Fetching all remotes. This will take a while."
+git fetch --all
+
+git merge --ff-only torvalds/master
+
+# Reduces the size of the repo a lot.
+git gc --aggressive --prune=now
+
+popd