alexion
a425a6b312
Fold the view command module (viewFile, the error type, the read adapter) into index.ts so the command functions sit beside the guarded CLI, and generalise formatViewError into formatError matching over a CliError union that new fallible commands extend. Align the test files with ADR 0009's tiers by name: - index_test.ts now holds the in-process integration tests of the command functions (formerly view_test.ts) - end_to_end_test.ts holds the black-box subprocess e2e (formerly index_test.ts)
55 lines
1.6 KiB
TypeScript
55 lines
1.6 KiB
TypeScript
#!/usr/bin/env bun
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import { readFileSync } from "node:fs";
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import { parse } from "@kitchen-md/core";
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import { Command } from "commander";
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import { err, ok, type Result } from "neverthrow";
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import { render } from "./render.ts";
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export type ViewError = { tag: "read-failed"; path: string; cause: string };
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// The union of every error a command can surface to the boundary; new fallible commands add their variants here.
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export type CliError = ViewError;
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export function viewFile(path: string): Result<string, ViewError> {
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return readFile(path).map((content) => render(parse(content)));
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}
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export function formatError(error: CliError): string {
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switch (error.tag) {
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case "read-failed":
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return `cannot read '${error.path}': ${error.cause}`;
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}
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}
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// The one place a throwing API is turned into a Result; nothing above this leaks exceptions.
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function readFile(path: string): Result<string, ViewError> {
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try {
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return ok(readFileSync(path, "utf8"));
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} catch (error) {
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const cause = error instanceof Error ? error.message : String(error);
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return err({ tag: "read-failed", path, cause });
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}
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}
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const program = new Command();
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program.name("kitchen").description("Read and view KitchenMD Recipe Files");
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program
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.command("view")
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.description("Render a Recipe File to the terminal")
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.argument("<file>", "path to a Recipe File")
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.action((file: string) => {
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viewFile(file).match(
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(output) => process.stdout.write(output),
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(error) => {
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process.stderr.write(`kitchen: ${formatError(error)}\n`);
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process.exit(1);
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},
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);
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});
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if (import.meta.main) {
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program.parse();
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}
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