feat: vendor permission system source

pi-permission-system/test/access-intent/bash/msys-bash-tokens.test.ts

@@ -0,0 +1,84 @@
+import { describe, expect, test } from "vitest";
+
+import { classifyWin32BashToken } from "#src/access-intent/bash/msys-bash-tokens";
+
+describe("classifyWin32BashToken", () => {
+  describe("device paths", () => {
+    test.each([
+      "/dev/null",
+      "/dev/stdin",
+      "/dev/stdout",
+      "/dev/stderr",
+    ])("%s is a device", (token) => {
+      expect(classifyWin32BashToken(token)).toEqual({ kind: "device" });
+    });
+  });
+
+  describe("MSYS drive mounts", () => {
+    test("translates /c/Users/x to C:\\Users\\x", () => {
+      expect(classifyWin32BashToken("/c/Users/x")).toEqual({
+        kind: "drive-mount",
+        windowsPath: "C:\\Users\\x",
+      });
+    });
+
+    test("uppercases the drive letter", () => {
+      expect(classifyWin32BashToken("/d/secrets/pw.txt")).toEqual({
+        kind: "drive-mount",
+        windowsPath: "D:\\secrets\\pw.txt",
+      });
+    });
+
+    test("accepts an already-uppercase mount letter", () => {
+      expect(classifyWin32BashToken("/C/x")).toEqual({
+        kind: "drive-mount",
+        windowsPath: "C:\\x",
+      });
+    });
+
+    test("bare /c translates to the drive root C:\\", () => {
+      expect(classifyWin32BashToken("/c")).toEqual({
+        kind: "drive-mount",
+        windowsPath: "C:\\",
+      });
+    });
+
+    test("trailing-slash /c/ translates to the drive root C:\\", () => {
+      expect(classifyWin32BashToken("/c/")).toEqual({
+        kind: "drive-mount",
+        windowsPath: "C:\\",
+      });
+    });
+  });
+
+  describe("other POSIX absolutes", () => {
+    test.each([
+      "/tmp/foo",
+      "/usr/bin",
+      "/etc/hosts",
+      "/mingw64/bin",
+    ])("%s is a posix-absolute", (token) => {
+      expect(classifyWin32BashToken(token)).toEqual({
+        kind: "posix-absolute",
+      });
+    });
+
+    test("a two-letter first segment is not a drive mount", () => {
+      expect(classifyWin32BashToken("/cc/x")).toEqual({
+        kind: "posix-absolute",
+      });
+    });
+  });
+
+  describe("plain tokens", () => {
+    test.each([
+      "src/foo.ts",
+      "foo.ts",
+      "C:\\Users\\x",
+      "C:/Users/x",
+      "../up",
+    ])("%s is plain", (token) => {
+      expect(classifyWin32BashToken(token)).toEqual({ kind: "plain" });
+    });
+  });
+});