fix(non-interactive-env): detect shell type for csh/tcsh env var syntax (fixes #2089)

src/shared/shell-env.ts

@@ -1,4 +1,4 @@
-export type ShellType = "unix" | "powershell" | "cmd"
+export type ShellType = "unix" | "powershell" | "cmd" | "csh"
 
 /**
  * Detect the current shell type based on environment variables.
@@ -14,6 +14,10 @@ export function detectShellType(): ShellType {
   }
 
   if (process.env.SHELL) {
+    const shell = process.env.SHELL
+    if (shell.includes("csh") || shell.includes("tcsh")) {
+      return "csh"
+    }
     return "unix"
   }
 
@@ -34,6 +38,7 @@ export function shellEscape(value: string, shellType: ShellType): string {
 
   switch (shellType) {
     case "unix":
+    case "csh":
       if (/[^a-zA-Z0-9_\-.:\/]/.test(value)) {
         return `'${value.replace(/'/g, "'\\''")}'`
       }
@@ -91,6 +96,13 @@ export function buildEnvPrefix(
       return `export ${assignments};`
     }
 
+    case "csh": {
+      const assignments = entries
+        .map(([key, value]) => `setenv ${key} ${shellEscape(value, shellType)}`)
+        .join("; ")
+      return `${assignments};`
+    }
+
     case "powershell": {
       const assignments = entries
         .map(([key, value]) => `$env:${key}=${shellEscape(value, shellType)}`)