rustup-toolchain-install-master: init at 1.7.3

Signed-off-by: David Wood <david.wood@codeplay.com>

pkgs/development/tools/rust/rustup-toolchain-install-master/0001-dynamically-patchelf-binaries.patch

@@ -0,0 +1,61 @@
+diff --git a/src/main.rs b/src/main.rs
+index 3cb6896..7f070e0 100644
+--- a/src/main.rs
++++ b/src/main.rs
+@@ -275,7 +275,9 @@ fn install_single_toolchain(
+
+     // install
+     if maybe_dry_client.is_some() {
+-        rename(&toolchain.dest, toolchain_path)?;
++        rename(&toolchain.dest, toolchain_path.clone())?;
++        nix_patchelf(toolchain_path)
++            .expect("failed to patch toolchain for NixOS");
+         eprintln!(
+             "toolchain `{}` is successfully installed!",
+             toolchain.dest.display()
+@@ -291,6 +293,45 @@ fn install_single_toolchain(
+     Ok(())
+ }
+
++fn nix_patchelf(mut toolchain_path: PathBuf) -> Result<(), Error> {
++    toolchain_path.push("bin");
++
++    for entry in toolchain_path.read_dir()? {
++        let entry = entry?;
++        if !entry.file_type()?.is_file() {
++            continue;
++        }
++
++        eprintln!("info: you seem to be running NixOS. Attempting to patch {}",
++                  entry.path().to_str().unwrap());
++        let _ = ::std::process::Command::new("@patchelf@/bin/patchelf")
++            .arg("--set-interpreter")
++            .arg("@dynamicLinker@")
++            .arg(entry.path())
++            .output();
++    }
++
++    toolchain_path.pop();
++    toolchain_path.push("lib");
++
++    for entry in toolchain_path.read_dir()? {
++        let entry = entry?;
++        if !entry.file_type()?.is_file() {
++            continue;
++        }
++
++        eprintln!("info: you seem to be running NixOS. Attempting to patch {}",
++                  entry.path().to_str().unwrap());
++        let _ = ::std::process::Command::new("@patchelf@/bin/patchelf")
++            .arg("--set-rpath")
++            .arg("@libPath@")
++            .arg(entry.path())
++            .output();
++    }
++
++    Ok(())
++}
++
+ fn fetch_master_commit(client: &Client, github_token: Option<&str>) -> Result<String, Error> {
+     eprintln!("fetching master commit hash... ");
+     fetch_master_commit_via_git()

pkgs/development/tools/rust/rustup-toolchain-install-master/default.nix

@@ -0,0 +1,56 @@
+{ stdenv
+, lib
+, fetchFromGitHub
+, rustPlatform
+, pkg-config
+, openssl
+, runCommand
+, patchelf
+, zlib
+, Security
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "rustup-toolchain-install-master";
+  version = "1.7.3";
+
+  src = fetchFromGitHub {
+    owner = "kennytm";
+    repo = pname;
+    rev = "v${version}";
+    hash = "sha256-J25ER/g8Kylw/oTIEl4Gl8i1xmhR+4JM5M5EHpl1ras=";
+  };
+
+  patches =
+    let
+      patchelfPatch = runCommand "0001-dynamically-patchelf-binaries.patch" {
+        CC = stdenv.cc;
+        patchelf = patchelf;
+        libPath = "$ORIGIN/../lib:${lib.makeLibraryPath [ zlib ]}";
+      }
+      ''
+        export dynamicLinker=$(cat $CC/nix-support/dynamic-linker)
+        substitute ${./0001-dynamically-patchelf-binaries.patch} $out \
+          --subst-var patchelf \
+          --subst-var dynamicLinker \
+          --subst-var libPath
+      '';
+    in
+    lib.optionals stdenv.isLinux [ patchelfPatch ];
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [
+    openssl
+  ] ++ lib.optionals stdenv.isDarwin [
+    Security
+  ];
+
+  cargoSha256 = "n7t8Ap9hdhrjmtKjfdyozf26J7yhu57pedm19CunLF4=";
+
+  meta = with lib; {
+    description = "Install a rustc master toolchain usable from rustup";
+    homepage = "https://github.com/kennytm/rustup-toolchain-install-master";
+    license = licenses.mit;
+    maintainers = with maintainers; [ davidtwco ];
+  };
+}

pkgs/top-level/all-packages.nix

@@ -11585,6 +11585,9 @@ in
   rustup = callPackage ../development/tools/rust/rustup {
     inherit (darwin.apple_sdk.frameworks) CoreServices Security;
   };
+  rustup-toolchain-install-master = callPackage ../development/tools/rust/rustup-toolchain-install-master {
+    inherit (darwin.apple_sdk.frameworks) Security;
+  };
 
   sagittarius-scheme = callPackage ../development/compilers/sagittarius-scheme {};