chore: sync public mirror from internal

.github/actions/setup-rust/action.yml

@@ -122,6 +122,16 @@ runs:
           chmod +x "$cargo_home/bin/rustup"
         fi
 
+        # A copied rustup binary skips rustup-init, which normally creates env.
+        # Recreate that file after clearing our tool root: a runner login profile
+        # from an earlier install may still source this exact stable path.
+        cat > "$cargo_home/env" <<EOF
+        case ":\${PATH}:" in
+          *:"$cargo_home/bin":*) ;;
+          *) export PATH="$cargo_home/bin:\$PATH" ;;
+        esac
+        EOF
+
         echo "CARGO_HOME=$cargo_home" >> "$GITHUB_ENV"
         echo "RUSTUP_HOME=$rustup_home" >> "$GITHUB_ENV"
         echo "$cargo_home/bin" >> "$GITHUB_PATH"

.repository-projection.json

@@ -3,11 +3,11 @@
   "projection": "deixic-code",
   "projectionSchemaVersion": 1,
   "sourceRepository": "dx-corp/mono",
-  "sourceSha": "792ca39c3e3492c9d7bc4873dfc75869237ecbc4",
+  "sourceSha": "286d0a37ebf99fa22738837904ad8e9f2b3b111b",
   "destinationRepository": "dx-corp/code",
-  "priorProjectedBase": "7fd521be8426582afe782fce895e6646cc33c762",
+  "priorProjectedBase": "286f11a74b63db13a1acd5b4734a431f224e002c",
   "definitionDigest": "82936441c776e3e8edb5d215a75007ec9714a233f489d460075d79d5ef5ba32f",
   "toolDigest": "f8cb071b0f27267120ccf45a00d0982f45113bd23535bef6a1555b4933f99f13",
-  "contentDigest": "ab481067715e68db84c8c97cdaf6f3d9d73870c42dcb8a47771e05000490ed23",
+  "contentDigest": "5d1b37000892e79eded38fcd977ec4da312724f0f21f5c1aedf39ac65a3b440b",
   "publicationEligible": true
 }

scripts/setup-rust-env.test.mjs

@@ -0,0 +1,28 @@
+import assert from "node:assert/strict";
+import { execFileSync } from "node:child_process";
+import { mkdtempSync, readFileSync, rmSync, writeFileSync, mkdirSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { test } from "node:test";
+
+test("copied rustup recreates the env file sourced by an existing login profile", () => {
+  const root = mkdtempSync(join(tmpdir(), "maestro-rust-env-"));
+  try {
+    const action = readFileSync(".github/actions/setup-rust/action.yml", "utf8");
+    const step = action.split("      run: | # zizmor:")[1].split("\n    - name:")[0];
+    const script = step.split("\n").slice(1).map((line) => line.startsWith("        ") ? line.slice(8) : line).join("\n")
+      .replace("cache_root=/tmp/maestro-rust", `cache_root="${root}/cache"`);
+    const bin = join(root, "bin"); mkdirSync(bin);
+    writeFileSync(join(bin, "rustup"), "#!/bin/sh\nexit 0\n", {mode: 0o755});
+    const env = {...process.env, PATH: `${bin}:${process.env.PATH}`, RUNNER_OS: "Linux", GITHUB_REPOSITORY: "conformance/env", TOOLCHAIN_INPUT: "1.95.0", WORKSPACES_INPUT: ".", GITHUB_ENV: join(root,"env"), GITHUB_PATH: join(root,"path"), GITHUB_OUTPUT: join(root,"output")};
+    const cargoHome = join(root,"cache/conformance-env/1.95.0/home/cargo");
+    const profile = join(root,"profile"); writeFileSync(profile, `. "${cargoHome}/env"\n`);
+    for (let run = 0; run < 2; run++) {
+      execFileSync("bash", ["-c", script], {env, cwd: process.cwd()});
+      const output = execFileSync("sh", ["-c", `. "${profile}"; printf runtime-conformance-shell`], {env, encoding: "utf8"});
+      assert.equal(output, "runtime-conformance-shell");
+      const path = execFileSync("sh", ["-c", `. "${profile}"; . "${profile}"; printf '%s' "$PATH"`], {env, encoding:"utf8"});
+      assert.equal(path.split(":").filter((entry) => entry === `${cargoHome}/bin`).length, 1);
+    }
+  } finally { rmSync(root, {recursive:true,force:true}); }
+});