From 99895923b96003d66f851cce1e8caa285db89e24 Mon Sep 17 00:00:00 2001
From: ahmdkaml <ahmdkaml2006@gmail.com>
Date: Tue, 28 Jul 2026 02:23:54 +0300
Subject: [PATCH 1/4] Add Go toolchain detection

---
 src/detect.js                                 | 36 ++++++++++++++++---
 test/detect.test.js                           | 11 ++++--
 .../fixtures/aligned/.github/workflows/ci.yml |  5 +++
 test/fixtures/aligned/go.mod                  |  2 ++
 test/fixtures/drift/Dockerfile                |  1 +
 test/fixtures/drift/go.mod                    |  1 +
 6 files changed, 49 insertions(+), 7 deletions(-)
 create mode 100644 test/fixtures/aligned/go.mod
 create mode 100644 test/fixtures/drift/go.mod

diff --git a/src/detect.js b/src/detect.js
index 2f5f8fb..3d64f98 100644
--- a/src/detect.js
+++ b/src/detect.js
@@ -61,6 +61,24 @@ async function detectPyproject(root, output) {
     if (match) add(output, "python", "pyproject.toml", match[1], index + 1);
   }
 }
+async function detectGoMod(root, output) {
+  const content = await read(root, "go.mod");
+  if (!content) return;
+
+  const lines = content.split(/\r?\n/);
+
+  for (const [index, line] of lines.entries()) {
+    const go = line.match(/^\s*go\s+(\S+)/);
+    if (go) {
+      add(output, "go", "go.mod", go[1], index + 1);
+    }
+
+    const toolchain = line.match(/^\s*toolchain\s+go(\S+)/);
+    if (toolchain) {
+      add(output, "go", "go.mod", toolchain[1], index + 1);
+    }
+  }
+}
 
 async function detectToolVersions(root, output) {
   const content = await read(root, ".tool-versions");
@@ -96,8 +114,17 @@ async function detectDockerfiles(root, output) {
     if (!entry.isFile() || !/^Dockerfile(?:\..+)?$/i.test(entry.name)) continue;
     const content = await read(root, entry.name);
     for (const [index, line] of content.split(/\r?\n/).entries()) {
-      const match = line.match(/^\s*FROM\s+(?:[^/\s]+\/)?(node|python):([^\s@]+)/i);
-      if (match) add(output, match[1].toLowerCase(), entry.name, match[2], index + 1);
+      const match = line.match(
+        /^\s*FROM\s+(?:[^/\s]+\/)?(node|python|golang):([^\s@]+)/i,
+      );
+      if (match)
+        add(
+          output,
+          match[1].toLowerCase() === "golang" ? "go" : match[1].toLowerCase(),
+          entry.name,
+          match[2],
+          index + 1,
+        );
     }
   }
 }
@@ -124,7 +151,7 @@ async function detectGithubActions(root, output) {
     let remaining = 0;
 
     for (const [index, line] of lines.entries()) {
-      const action = line.match(/uses:\s*actions\/setup-(node|python)@/i);
+      const action = line.match(/uses:\s*actions\/setup-(node|python|go)@/i);
       if (action) {
         runtime = action[1].toLowerCase();
         remaining = 12;
@@ -135,7 +162,7 @@ async function detectGithubActions(root, output) {
         continue;
       }
       remaining -= 1;
-      const declared = line.match(/(?:node-version|python-version):\s*["']?([^"'#\s]+)/i);
+      const declared = line.match(/(?:node-version|python-version|go-version):\s*["']?([^"'#\s]+)/i);
       if (runtime && declared && !declared[1].startsWith("${{")) {
         add(output, runtime, file, declared[1], index + 1);
         runtime = null;
@@ -150,6 +177,7 @@ export async function detectDeclarations(root) {
     detectVersionFiles(root, output),
     detectPackageJson(root, output),
     detectPyproject(root, output),
+    detectGoMod(root, output),
     detectToolVersions(root, output),
     detectMise(root, output),
     detectDockerfiles(root, output),
diff --git a/test/detect.test.js b/test/detect.test.js
index 7dec27d..ae848a0 100644
--- a/test/detect.test.js
+++ b/test/detect.test.js
@@ -11,18 +11,23 @@ test("finds aligned Node.js and Python declarations", async () => {
 
   assert.equal(result.ok, true);
   assert.deepEqual(
+    
     result.runtimes.map((runtime) => runtime.runtime),
-    ["node", "python"],
+    ["go","node", "python"],
   );
-  assert.equal(result.runtimes[0].declarations.length, 5);
+  assert.equal(result.runtimes[0].declarations.length, 3);
   assert.equal(result.runtimes[1].declarations.length, 5);
+  assert.equal(result.runtimes[2].declarations.length, 5);
 });
 
 test("finds Docker and project-file drift", async () => {
   const result = await inspect(path.join(here, "fixtures", "drift"));
 
   assert.equal(result.ok, false);
-  assert.equal(result.runtimes[0].runtime, "node");
+  assert.deepEqual(
+  result.runtimes.map((runtime) => runtime.runtime),
+  ["go", "node"],
+);
 });
 
 test("returns an empty success for a directory with no declarations", async () => {
diff --git a/test/fixtures/aligned/.github/workflows/ci.yml b/test/fixtures/aligned/.github/workflows/ci.yml
index a33365f..15e7e7e 100644
--- a/test/fixtures/aligned/.github/workflows/ci.yml
+++ b/test/fixtures/aligned/.github/workflows/ci.yml
@@ -9,3 +9,8 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
+  go:
+    steps:
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.24"
\ No newline at end of file
diff --git a/test/fixtures/aligned/go.mod b/test/fixtures/aligned/go.mod
new file mode 100644
index 0000000..d3f9de9
--- /dev/null
+++ b/test/fixtures/aligned/go.mod
@@ -0,0 +1,2 @@
+go 1.24
+toolchain go1.24.3
\ No newline at end of file
diff --git a/test/fixtures/drift/Dockerfile b/test/fixtures/drift/Dockerfile
index f0e004a..58abd4a 100644
--- a/test/fixtures/drift/Dockerfile
+++ b/test/fixtures/drift/Dockerfile
@@ -1 +1,2 @@
 FROM node:20-alpine
+FROM golang:1.23
\ No newline at end of file
diff --git a/test/fixtures/drift/go.mod b/test/fixtures/drift/go.mod
new file mode 100644
index 0000000..b506908
--- /dev/null
+++ b/test/fixtures/drift/go.mod
@@ -0,0 +1 @@
+go 1.24
\ No newline at end of file

From d90be13ef57c5d4e2ba36eb930c87f0665f076c7 Mon Sep 17 00:00:00 2001
From: ahmdkaml <ahmdkaml2006@gmail.com>
Date: Tue, 28 Jul 2026 18:31:39 +0300
Subject: [PATCH 2/4] Strengthen Go drift test

---
 test/detect.test.js                            | 13 +++++++------
 test/fixtures/aligned/.github/workflows/ci.yml |  2 +-
 test/fixtures/aligned/go.mod                   |  2 +-
 test/fixtures/drift/Dockerfile                 |  2 +-
 test/fixtures/drift/go.mod                     |  2 +-
 5 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/test/detect.test.js b/test/detect.test.js
index ae848a0..ac50477 100644
--- a/test/detect.test.js
+++ b/test/detect.test.js
@@ -11,9 +11,8 @@ test("finds aligned Node.js and Python declarations", async () => {
 
   assert.equal(result.ok, true);
   assert.deepEqual(
-    
     result.runtimes.map((runtime) => runtime.runtime),
-    ["go","node", "python"],
+    ["go", "node", "python"],
   );
   assert.equal(result.runtimes[0].declarations.length, 3);
   assert.equal(result.runtimes[1].declarations.length, 5);
@@ -22,12 +21,14 @@ test("finds aligned Node.js and Python declarations", async () => {
 
 test("finds Docker and project-file drift", async () => {
   const result = await inspect(path.join(here, "fixtures", "drift"));
-
   assert.equal(result.ok, false);
   assert.deepEqual(
-  result.runtimes.map((runtime) => runtime.runtime),
-  ["go", "node"],
-);
+    result.runtimes.map((runtime) => runtime.runtime),
+    ["go", "node"],
+  );
+  const go = result.runtimes.find((runtime) => runtime.runtime === "go");
+
+  assert.equal(go.ok, false);
 });
 
 test("returns an empty success for a directory with no declarations", async () => {
diff --git a/test/fixtures/aligned/.github/workflows/ci.yml b/test/fixtures/aligned/.github/workflows/ci.yml
index 15e7e7e..d932b85 100644
--- a/test/fixtures/aligned/.github/workflows/ci.yml
+++ b/test/fixtures/aligned/.github/workflows/ci.yml
@@ -13,4 +13,4 @@ jobs:
     steps:
       - uses: actions/setup-go@v5
         with:
-          go-version: "1.24"
\ No newline at end of file
+          go-version: "1.24"
diff --git a/test/fixtures/aligned/go.mod b/test/fixtures/aligned/go.mod
index d3f9de9..85cfba5 100644
--- a/test/fixtures/aligned/go.mod
+++ b/test/fixtures/aligned/go.mod
@@ -1,2 +1,2 @@
 go 1.24
-toolchain go1.24.3
\ No newline at end of file
+toolchain go1.24.3
diff --git a/test/fixtures/drift/Dockerfile b/test/fixtures/drift/Dockerfile
index 58abd4a..67a885b 100644
--- a/test/fixtures/drift/Dockerfile
+++ b/test/fixtures/drift/Dockerfile
@@ -1,2 +1,2 @@
 FROM node:20-alpine
-FROM golang:1.23
\ No newline at end of file
+FROM golang:1.23
diff --git a/test/fixtures/drift/go.mod b/test/fixtures/drift/go.mod
index b506908..8e3bc02 100644
--- a/test/fixtures/drift/go.mod
+++ b/test/fixtures/drift/go.mod
@@ -1 +1 @@
-go 1.24
\ No newline at end of file
+go 1.24

From 8ef18732af60c85238c4dd05ab18b38407ca7d9c Mon Sep 17 00:00:00 2001
From: ahmdkaml <ahmdkaml2006@gmail.com>
Date: Tue, 28 Jul 2026 18:40:45 +0300
Subject: [PATCH 3/4] Strengthen Go drift test

---
 src/format.js       | 8 +++++++-
 test/detect.test.js | 1 +
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/format.js b/src/format.js
index 2bf565e..70a9273 100644
--- a/src/format.js
+++ b/src/format.js
@@ -2,6 +2,12 @@ function location(declaration) {
   return declaration.line ? `${declaration.file}:${declaration.line}` : declaration.file;
 }
 
+const LABELS = {
+  go: "Go",
+  node: "Node.js",
+  python: "Python",
+};
+
 export function formatHuman(result) {
   if (result.runtimes.length === 0) {
     return "No supported runtime declarations found.";
@@ -14,7 +20,7 @@ export function formatHuman(result) {
     });
 
     if (!runtime.ok) {
-      const label = runtime.runtime === "node" ? "Node.js" : "Python";
+      const label = LABELS[runtime.runtime] ?? runtime.runtime;
       rows.push("", `  No ${label} version satisfies every declaration.`);
     } else if (runtime.declarations.some((declaration) => !declaration.parsed)) {
       rows.push("", "  Some declarations could not be parsed.");
diff --git a/test/detect.test.js b/test/detect.test.js
index ac50477..ec7ab70 100644
--- a/test/detect.test.js
+++ b/test/detect.test.js
@@ -28,6 +28,7 @@ test("finds Docker and project-file drift", async () => {
   );
   const go = result.runtimes.find((runtime) => runtime.runtime === "go");
 
+  assert.ok(go);
   assert.equal(go.ok, false);
 });
 

From 5d5ac186e12b7aac66497628104ddc7ba521182a Mon Sep 17 00:00:00 2001
From: ahmdkaml <ahmdkaml2006@gmail.com>
Date: Thu, 30 Jul 2026 15:52:29 +0300
Subject: [PATCH 4/4] Support Rust runtime detection

---
 src/detect.js                                 | 41 +++++++++++++++++--
 src/format.js                                 |  1 +
 test/detect.test.js                           | 15 +++++--
 .../fixtures/aligned/.github/workflows/ci.yml |  5 +++
 test/fixtures/aligned/Cargo.toml              |  5 +++
 test/fixtures/aligned/Dockerfile              |  1 +
 test/fixtures/aligned/rust-toolchain.toml     |  2 +
 test/fixtures/drift/Cargo.toml                |  5 +++
 test/fixtures/drift/Dockerfile                |  1 +
 test/fixtures/drift/rust-toolchain.toml       |  2 +
 10 files changed, 71 insertions(+), 7 deletions(-)
 create mode 100644 test/fixtures/aligned/Cargo.toml
 create mode 100644 test/fixtures/aligned/rust-toolchain.toml
 create mode 100644 test/fixtures/drift/Cargo.toml
 create mode 100644 test/fixtures/drift/rust-toolchain.toml

diff --git a/src/detect.js b/src/detect.js
index 3d64f98..9ebea74 100644
--- a/src/detect.js
+++ b/src/detect.js
@@ -61,6 +61,33 @@ async function detectPyproject(root, output) {
     if (match) add(output, "python", "pyproject.toml", match[1], index + 1);
   }
 }
+
+async function detectCargoToml(root, output) {
+  const content = await read(root, "Cargo.toml");
+  if (!content) return;
+  const lines = content.split(/\r?\n/);
+
+  for (const [index, line] of lines.entries()) {
+    const match = line.match(/^\s*rust-version\s*=\s*["']([^"']+)["']/);
+    if (match) {
+      add(output, "rust", "Cargo.toml", match[1], index + 1);
+    }
+  }
+}
+
+async function detectRustToolchain(root, output) {
+  const content = await read(root, "rust-toolchain.toml");
+  if (!content) return;
+  const lines = content.split(/\r?\n/);
+
+  for (const [index, line] of lines.entries()) {
+    const match = line.match(/^\s*channel\s*=\s*["']([^"']+)["']/);
+    if (match) {
+      add(output, "rust", "rust-toolchain.toml", match[1], index + 1);
+    }
+  }
+}
+
 async function detectGoMod(root, output) {
   const content = await read(root, "go.mod");
   if (!content) return;
@@ -115,7 +142,7 @@ async function detectDockerfiles(root, output) {
     const content = await read(root, entry.name);
     for (const [index, line] of content.split(/\r?\n/).entries()) {
       const match = line.match(
-        /^\s*FROM\s+(?:[^/\s]+\/)?(node|python|golang):([^\s@]+)/i,
+        /^\s*FROM\s+(?:[^/\s]+\/)?(node|python|golang|rust):([^\s@]+)/i,
       );
       if (match)
         add(
@@ -151,9 +178,11 @@ async function detectGithubActions(root, output) {
     let remaining = 0;
 
     for (const [index, line] of lines.entries()) {
-      const action = line.match(/uses:\s*actions\/setup-(node|python|go)@/i);
+      const action = line.match(
+        /uses:\s*(?:actions\/setup-(node|python|go)|dtolnay\/rust-toolchain)@/i,
+      );
       if (action) {
-        runtime = action[1].toLowerCase();
+        runtime = action[1] ? action[1].toLowerCase() : "rust";
         remaining = 12;
         continue;
       }
@@ -162,7 +191,9 @@ async function detectGithubActions(root, output) {
         continue;
       }
       remaining -= 1;
-      const declared = line.match(/(?:node-version|python-version|go-version):\s*["']?([^"'#\s]+)/i);
+      const declared = line.match(
+        /(?:node-version|python-version|go-version|toolchain):\s*["']?([^"'#\s]+)/i,
+      );
       if (runtime && declared && !declared[1].startsWith("${{")) {
         add(output, runtime, file, declared[1], index + 1);
         runtime = null;
@@ -178,6 +209,8 @@ export async function detectDeclarations(root) {
     detectPackageJson(root, output),
     detectPyproject(root, output),
     detectGoMod(root, output),
+    detectCargoToml(root, output),
+    detectRustToolchain(root, output),
     detectToolVersions(root, output),
     detectMise(root, output),
     detectDockerfiles(root, output),
diff --git a/src/format.js b/src/format.js
index 70a9273..bb5f3cf 100644
--- a/src/format.js
+++ b/src/format.js
@@ -6,6 +6,7 @@ const LABELS = {
   go: "Go",
   node: "Node.js",
   python: "Python",
+  rust: "Rust",
 };
 
 export function formatHuman(result) {
diff --git a/test/detect.test.js b/test/detect.test.js
index ec7ab70..d15073d 100644
--- a/test/detect.test.js
+++ b/test/detect.test.js
@@ -6,17 +6,18 @@ import { inspect } from "../src/index.js";
 
 const here = path.dirname(fileURLToPath(import.meta.url));
 
-test("finds aligned Node.js and Python declarations", async () => {
+test("finds aligned Node.js, golang, Rust, and Python declarations", async () => {
   const result = await inspect(path.join(here, "fixtures", "aligned"));
 
   assert.equal(result.ok, true);
   assert.deepEqual(
     result.runtimes.map((runtime) => runtime.runtime),
-    ["go", "node", "python"],
+    ["go", "node", "python", "rust"],
   );
   assert.equal(result.runtimes[0].declarations.length, 3);
   assert.equal(result.runtimes[1].declarations.length, 5);
   assert.equal(result.runtimes[2].declarations.length, 5);
+  assert.equal(result.runtimes[3].declarations.length, 4);
 });
 
 test("finds Docker and project-file drift", async () => {
@@ -24,12 +25,20 @@ test("finds Docker and project-file drift", async () => {
   assert.equal(result.ok, false);
   assert.deepEqual(
     result.runtimes.map((runtime) => runtime.runtime),
-    ["go", "node"],
+    ["go", "node", "rust"],
   );
+  // Node.js, golang, and Rust are all misaligned
+  const node = result.runtimes.find((runtime) => runtime.runtime === "node");
+  assert.ok(node);
+  assert.equal(node.ok, false);
   const go = result.runtimes.find((runtime) => runtime.runtime === "go");
 
   assert.ok(go);
   assert.equal(go.ok, false);
+
+  const rust = result.runtimes.find((runtime) => runtime.runtime === "rust");
+  assert.ok(rust);
+  assert.equal(rust.ok, false);
 });
 
 test("returns an empty success for a directory with no declarations", async () => {
diff --git a/test/fixtures/aligned/.github/workflows/ci.yml b/test/fixtures/aligned/.github/workflows/ci.yml
index d932b85..80d14d9 100644
--- a/test/fixtures/aligned/.github/workflows/ci.yml
+++ b/test/fixtures/aligned/.github/workflows/ci.yml
@@ -14,3 +14,8 @@ jobs:
       - uses: actions/setup-go@v5
         with:
           go-version: "1.24"
+  rust:
+    steps:
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          toolchain: "1.81.0"
diff --git a/test/fixtures/aligned/Cargo.toml b/test/fixtures/aligned/Cargo.toml
new file mode 100644
index 0000000..0331b24
--- /dev/null
+++ b/test/fixtures/aligned/Cargo.toml
@@ -0,0 +1,5 @@
+[package]
+name = "example"
+version = "0.1.0"
+edition = "2021"
+rust-version = "1.81"
diff --git a/test/fixtures/aligned/Dockerfile b/test/fixtures/aligned/Dockerfile
index 82caf45..837dd2e 100644
--- a/test/fixtures/aligned/Dockerfile
+++ b/test/fixtures/aligned/Dockerfile
@@ -1,2 +1,3 @@
 FROM node:22-alpine AS web
 FROM python:3.12-slim AS worker
+FROM rust:1.81.0
diff --git a/test/fixtures/aligned/rust-toolchain.toml b/test/fixtures/aligned/rust-toolchain.toml
new file mode 100644
index 0000000..1de01fa
--- /dev/null
+++ b/test/fixtures/aligned/rust-toolchain.toml
@@ -0,0 +1,2 @@
+[toolchain]
+channel = "1.81.0"
diff --git a/test/fixtures/drift/Cargo.toml b/test/fixtures/drift/Cargo.toml
new file mode 100644
index 0000000..0331b24
--- /dev/null
+++ b/test/fixtures/drift/Cargo.toml
@@ -0,0 +1,5 @@
+[package]
+name = "example"
+version = "0.1.0"
+edition = "2021"
+rust-version = "1.81"
diff --git a/test/fixtures/drift/Dockerfile b/test/fixtures/drift/Dockerfile
index 67a885b..373bd7c 100644
--- a/test/fixtures/drift/Dockerfile
+++ b/test/fixtures/drift/Dockerfile
@@ -1,2 +1,3 @@
 FROM node:20-alpine
 FROM golang:1.23
+FROM rust:1.82
diff --git a/test/fixtures/drift/rust-toolchain.toml b/test/fixtures/drift/rust-toolchain.toml
new file mode 100644
index 0000000..1de01fa
--- /dev/null
+++ b/test/fixtures/drift/rust-toolchain.toml
@@ -0,0 +1,2 @@
+[toolchain]
+channel = "1.81.0"