Add custom path support for cli/tui in terminal config

tests/cli/autocomplete-completions.test.ts

@@ -0,0 +1,112 @@
+import { afterEach, describe, expect, test } from "vitest";
+import { mkdtempSync, readFileSync, rmSync, writeFileSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+
+import {
+  generateBashCompletions,
+  generateFishCompletions,
+  generateZshCompletions,
+  installCompletions,
+} from "../../src/cli/autocomplete/completions";
+
+describe("shell completions", () => {
+  const tempDirs: string[] = [];
+
+  afterEach(() => {
+    for (const tempDir of tempDirs) {
+      rmSync(tempDir, { recursive: true, force: true });
+    }
+    tempDirs.length = 0;
+  });
+
+  function createConfigFile(contents = ""): string {
+    const tempDir = mkdtempSync(join(tmpdir(), "xo-cli-completions-test-"));
+    tempDirs.push(tempDir);
+    const configFile = join(tempDir, "shellrc");
+    writeFileSync(configFile, contents);
+    return configFile;
+  }
+
+  test("uses shell-native mnemonic completion in bash", () => {
+    const completions = generateBashCompletions("xo-cli");
+
+    expect(completions).toContain(
+      'local config_dir="${XO_CONFIG_DIR:-${HOME}/.config/xo-cli}"',
+    );
+    expect(completions).toContain('__xo_complete_mnemonics "${cur}"');
+    expect(completions).not.toContain('__xo_complete mnemonics "${cur}"');
+  });
+
+  test("uses shell-native mnemonic completion in zsh", () => {
+    const completions = generateZshCompletions("xo-cli");
+
+    expect(completions).toContain(
+      'local config_dir="${XO_CONFIG_DIR:-${HOME}/.config/xo-cli}"',
+    );
+    expect(completions).toContain(
+      '__xo_complete_mnemonics "${words[CURRENT]}"',
+    );
+    expect(completions).not.toContain(
+      '__xo_complete mnemonics "${words[CURRENT]}"',
+    );
+  });
+
+  test("uses shell-native mnemonic completion in fish", () => {
+    const completions = generateFishCompletions("xo-cli");
+
+    expect(completions).toContain("set -l config_dir \"$XO_CONFIG_DIR\"");
+    expect(completions).toContain("(__xo_cli_complete_mnemonics)");
+    expect(completions).not.toContain("(__xo_cli_complete_dynamic mnemonics)");
+  });
+
+  test("installs the config default and completion loader once", () => {
+    const configFile = createConfigFile();
+
+    expect(installCompletions("bash", "xo-cli", configFile)).toBe(true);
+    expect(installCompletions("bash", "xo-cli", configFile)).toBe(false);
+
+    const contents = readFileSync(configFile, "utf8");
+    expect(contents.match(/XO_CONFIG_DIR/g)).toHaveLength(2);
+    expect(contents.match(/eval "\$\(xo-cli completions bash\)"/g)).toHaveLength(
+      1,
+    );
+  });
+
+  test("adds a missing default without duplicating an existing loader", () => {
+    const configFile = createConfigFile('eval "$(xo-cli completions bash)"\n');
+
+    expect(installCompletions("bash", "xo-cli", configFile)).toBe(true);
+
+    const contents = readFileSync(configFile, "utf8");
+    expect(contents.match(/eval "\$\(xo-cli completions bash\)"/g)).toHaveLength(
+      1,
+    );
+    expect(contents).toContain(
+      'export XO_CONFIG_DIR="${XO_CONFIG_DIR:-$HOME/.config/xo-cli}"',
+    );
+  });
+
+  test("preserves an existing custom config directory assignment", () => {
+    const configFile = createConfigFile("export XO_CONFIG_DIR=/tmp/custom-xo\n");
+
+    expect(installCompletions("zsh", "xo-cli", configFile)).toBe(true);
+
+    const contents = readFileSync(configFile, "utf8");
+    expect(contents).toContain("export XO_CONFIG_DIR=/tmp/custom-xo");
+    expect(contents).not.toContain("${XO_CONFIG_DIR:-$HOME/.config/xo-cli}");
+    expect(contents).toContain('eval "$(xo-cli completions zsh)"');
+  });
+
+  test("uses fish syntax when installing fish completions", () => {
+    const configFile = createConfigFile();
+
+    expect(installCompletions("fish", "xo-cli", configFile)).toBe(true);
+
+    const contents = readFileSync(configFile, "utf8");
+    expect(contents).toContain(
+      'set -q XO_CONFIG_DIR; or set -gx XO_CONFIG_DIR "$HOME/.config/xo-cli"',
+    );
+    expect(contents).toContain("xo-cli completions fish | source");
+  });
+});