[deno-app-build] Ensure wasm dependency is cached offline

shopstic · May 20, 2024 · 2b76405 · 2b76405
1 parent 0eac6a3
commit 2b76405
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Showing 4 changed files with 32 additions and 7 deletions.
diff --git a/lib/deno-app-compile.nix b/lib/deno-app-compile.nix
@@ -47,7 +47,7 @@ in
 stdenv.mkDerivation {
   inherit src name;
   nativeBuildInputs = [ makeWrapper deno ];
-  __noChroot = true;
+  __noChroot = deno-cache == null;
   phases = [ "unpackPhase" "installPhase" ];
   installPhase =
     ''

diff --git a/pkgs/deno-app-build/build.ts b/pkgs/deno-app-build/build.ts
@@ -1,4 +1,4 @@
-import { transpile, type TranspileOptions } from "jsr:@deno/emit@0.40.2";
+import { transpile, type TranspileOptions } from "./emit.ts";
 import {
   dirname,
   fromFileUrl,

diff --git a/pkgs/deno-app-build/default.nix b/pkgs/deno-app-build/default.nix
@@ -2,19 +2,24 @@
 , denort
 , writeShellScriptBin
 , runCommand
+, makeWrapper
 }:
 let
-  deno-app-build-src = ./build.ts;
+  deno-app-build-src = ./.;
   deno-app-build = runCommand "deno-app-build"
     {
       __noChroot = true;
-      nativeBuildInputs = [ deno ];
+      nativeBuildInputs = [ deno makeWrapper ];
     }
     ''
-      mkdir -p $out/bin
+      mkdir -p $out/bin $out/cache
       export DENO_DIR=$(mktemp -d)
+      export TEST_PATH=$(mktemp -d)
       export DENORT_BIN="${denort}/bin/denort"
-      deno compile -A --check --output=$out/bin/deno-app-build ${deno-app-build-src}
+      deno compile -A --check --output=$out/bin/deno-app-build ${deno-app-build-src}/build.ts
+      wrapProgram "$out/bin/deno-app-build" --set DENO_EMIT_WASM_CACHE_HOME "$out/cache"
+      echo "console.log('test');" > "$TEST_PATH/test.ts"
+      $out/bin/deno-app-build --app-path="$TEST_PATH/test.ts" --out-path="$TEST_PATH/out"
     '';
-in 
+in
 deno-app-build
diff --git a/pkgs/deno-app-build/emit.ts b/pkgs/deno-app-build/emit.ts
@@ -0,0 +1,20 @@
+import {
+  transpile as originalTranspile,
+  type TranspileOptions,
+} from "jsr:@deno/[email protected]";
+export { type TranspileOptions };
+
+export async function transpile(
+  root: string | URL,
+  options: TranspileOptions = {},
+) {
+  const DENO_EMIT_WASM_CACHE_HOME = Deno.env.get("DENO_EMIT_WASM_CACHE_HOME");
+
+  if (!DENO_EMIT_WASM_CACHE_HOME) {
+    throw new Error("DENO_EMIT_WASM_CACHE_HOME env var is not set");
+  }
+
+  Deno.env.set("HOME", DENO_EMIT_WASM_CACHE_HOME);
+  Deno.env.set("XDG_DATA_HOME", DENO_EMIT_WASM_CACHE_HOME);
+  return await originalTranspile(root, options);
+}