fix shell inference in powershell when installed through scoop (#1164)

* be more verbose on shell inference issues in Windows

* add changeset

* fix shell inference with scoop

* change changeset text

* test scoop shims

* don't concat paths

* skip instead of not emitting tests

* setup scoop in windows

* use test.skip

.changeset/warm-garlics-move.md

@@ -0,0 +1,5 @@
+---
+"fnm": patch
+---
+
+windows: fix shell inference in powershell when using scoop's shims

.github/workflows/rust.yml

@@ -138,6 +138,7 @@ jobs:
         with:
           name: fnm-windows
           path: target/release
+      - uses: MinoruSekine/setup-scoop@v4
       - uses: pnpm/action-setup@v2.4.0
         with:
           run_install: false

e2e/shellcode/shells/cmdEnv.ts

@@ -1,6 +1,7 @@
 import { ScriptLine, define } from "./types.js"
 
 type EnvConfig = {
+  executableName: string
   useOnCd: boolean
   logLevel: string
   corepackEnabled: boolean
@@ -9,9 +10,15 @@ type EnvConfig = {
 export type HasEnv = { env(cfg: Partial<EnvConfig>): ScriptLine }
 
 function stringify(envConfig: Partial<EnvConfig> = {}) {
-  const { useOnCd, logLevel, corepackEnabled, resolveEngines } = envConfig
+  const {
+    useOnCd,
+    logLevel,
+    corepackEnabled,
+    resolveEngines,
+    executableName = "fnm",
+  } = envConfig
   return [
-    `fnm env`,
+    `${executableName} env`,
     useOnCd && "--use-on-cd",
     logLevel && `--log-level=${logLevel}`,
     corepackEnabled && "--corepack-enabled",

e2e/windows-scoop.test.ts

@@ -0,0 +1,33 @@
+import { script } from "./shellcode/script.js"
+import { Bash, Fish, PowerShell, WinCmd, Zsh } from "./shellcode/shells.js"
+import testNodeVersion from "./shellcode/test-node-version.js"
+import describe from "./describe.js"
+import os from "node:os"
+import { execa } from "execa"
+
+if (os.platform() !== "win32") {
+  test.skip("scoop shims only work on Windows", () => {})
+} else {
+  beforeAll(async () => {
+    // Create a scoop shim for tests
+    await execa(`scoop`, [
+      "shim",
+      "add",
+      "fnm_release",
+      "target/release/fnm.exe",
+    ])
+  })
+
+  for (const shell of [Bash, Zsh, Fish, PowerShell, WinCmd]) {
+    describe(shell, () => {
+      test(`scoop shims infer the shell`, async () => {
+        await script(shell)
+          .then(shell.env({ executableName: "fnm_release" }))
+          .then(shell.call("fnm_release", ["install", "v20.14.0"]))
+          .then(shell.call("fnm_release", ["use", "v20.14.0"]))
+          .then(testNodeVersion(shell, "v20.14.0"))
+          .execute(shell)
+      })
+    })
+  }
+}

src/shell/infer/windows.rs

@@ -1,20 +1,32 @@
 #![cfg(not(unix))]
 
 use crate::shell::Shell;
-use sysinfo::System;
+use log::{debug, warn};
+use sysinfo::{ProcessRefreshKind, System, UpdateKind};
 
 pub fn infer_shell() -> Option<Box<dyn Shell>> {
     let mut system = System::new();
     let mut current_pid = sysinfo::get_current_pid().ok();
 
+    system
+        .refresh_processes_specifics(ProcessRefreshKind::new().with_exe(UpdateKind::OnlyIfNotSet));
+
     while let Some(pid) = current_pid {
-        system.refresh_process(pid);
         if let Some(process) = system.process(pid) {
             current_pid = process.parent();
+            debug!("pid {pid} parent process is {current_pid:?}");
             let process_name = process
                 .exe()
-                .and_then(|x| x.file_stem())
-                .and_then(|x| x.to_str())
+                .and_then(|x| {
+                    tap_none(x.file_stem(), || {
+                        warn!("failed to get file stem from {:?}", x);
+                    })
+                })
+                .and_then(|x| {
+                    tap_none(x.to_str(), || {
+                        warn!("failed to convert file stem to string: {:?}", x);
+                    })
+                })
                 .map(str::to_lowercase);
             if let Some(shell) = process_name
                 .as_ref()
@@ -24,9 +36,22 @@ pub fn infer_shell() -> Option<Box<dyn Shell>> {
                 return Some(shell);
             }
         } else {
+            warn!("process not found for {pid}");
             current_pid = None;
         }
     }
 
     None
 }
+
+fn tap_none<T, F>(opt: Option<T>, f: F) -> Option<T>
+where
+    F: FnOnce(),
+{
+    match &opt {
+        Some(_) => (),
+        None => f(),
+    };
+
+    opt
+}