extract shell config logic and add bash command cancellation in tui

packages/coding-agent/src/shell-config.ts

@@ -0,0 +1,30 @@
+import { existsSync } from "fs";
+
+/**
+ * Get shell configuration based on platform
+ */
+export function getShellConfig(): { shell: string; args: string[] } {
+	if (process.platform === "win32") {
+		const paths: string[] = [];
+		const programFiles = process.env.ProgramFiles;
+		if (programFiles) {
+			paths.push(`${programFiles}\\Git\\bin\\bash.exe`);
+		}
+		const programFilesX86 = process.env["ProgramFiles(x86)"];
+		if (programFilesX86) {
+			paths.push(`${programFilesX86}\\Git\\bin\\bash.exe`);
+		}
+
+		for (const path of paths) {
+			if (existsSync(path)) {
+				return { shell: path, args: ["-c"] };
+			}
+		}
+
+		throw new Error(
+			`Git Bash not found. Please install Git for Windows from https://git-scm.com/download/win\n` +
+				`Searched in:\n${paths.map((p) => `  ${p}`).join("\n")}`,
+		);
+	}
+	return { shell: "sh", args: ["-c"] };
+}