From 5119e0be0e79d7813d4cedaff105f9134203aa8f Mon Sep 17 00:00:00 2001
From: "Zed A. Shaw" <zed.shaw@gmail.com>
Date: Mon, 12 Dec 2022 18:42:02 -0500
Subject: [PATCH] Command line tool for generating djenterator templates
 instead of using the web interface.

---
 api/devtools/djenterator.js        |  4 --
 commands/djent.js                  | 60 ++++++++++++++++++++++++++++++
 static/djenterator/command.js      | 46 +++++++++++++++++++++++
 static/djenterator/command.js.vars |  1 +
 4 files changed, 107 insertions(+), 4 deletions(-)
 create mode 100644 commands/djent.js
 create mode 100644 static/djenterator/command.js
 create mode 100644 static/djenterator/command.js.vars

diff --git a/api/devtools/djenterator.js b/api/devtools/djenterator.js
index 25da6e5..affa132 100644
--- a/api/devtools/djenterator.js
+++ b/api/devtools/djenterator.js
@@ -1,11 +1,7 @@
-import logging from '../../lib/logging.js';
 import { API } from '../../lib/api.js';
 import glob from "fast-glob";
 import path from "path";
 
-const log = logging.create("/api/devtools/djenterator.js");
-
-
 export const get = async (req, res) => {
   const api = new API(req, res);
 
diff --git a/commands/djent.js b/commands/djent.js
new file mode 100644
index 0000000..d58946d
--- /dev/null
+++ b/commands/djent.js
@@ -0,0 +1,60 @@
+import fs from "fs";
+import assert from "assert";
+import logging from '../lib/logging.js';
+import glob from "fast-glob";
+import path from "path";
+import template from "lodash/template.js";
+
+const log = logging.create(import.meta.url);
+
+export const description = "Describe your command here."
+
+// your command uses the npm package commander's options format
+export const options = [
+  ["--list", "List the available templates to use."],
+  ["--force", "Overwrite the output if it exists."],
+  ["--output <string>", "Save to file rather than stdout."],
+  ["--template <name>", "Name of the template to generate. Use --list to see."]
+]
+
+const check = (test, fail_message) => {
+  if(!test) {
+    log.error(fail_message);
+    process.exit(1);
+  }
+}
+
+export const main = async (opts) => {
+  try {
+    if(opts.list) {
+      const available = glob.sync("./static/djenterator/!(*.vars|*.swp)");
+      for(let name of available) {
+        console.log(name);
+      }
+    } else {
+      check(opts.template, "--template is required.");
+      check(opts.output, "--output is required.");
+
+      check(fs.existsSync(opts.template), `template file ${opts.template} does not exist`);
+
+      const in_template = fs.readFileSync(opts.template).toString();
+
+      const vars_file = `${opts.template}.vars`;
+      const in_vars = fs.existsSync(vars_file) ? fs.readFileSync(vars_file) : {};
+
+      const renderer = template(in_template);
+      const result = renderer(JSON.parse(in_vars));
+
+      if(!opts.force) {
+        check(!fs.existsSync(opts.output), `output file ${opts.output} exists already won't overwrite.`);
+      }
+
+      fs.writeFileSync(opts.output, result);
+    }
+  } catch(error) {
+    log.error(error);
+    process.exit(1);
+  }
+
+  process.exit(0);
+}
diff --git a/static/djenterator/command.js b/static/djenterator/command.js
new file mode 100644
index 0000000..bd2650a
--- /dev/null
+++ b/static/djenterator/command.js
@@ -0,0 +1,46 @@
+// you may not need all of these but they come up a lot
+import fs from "fs";
+import assert from "assert";
+import logging from '../lib/logging.js';
+import glob from "fast-glob";
+import path from "path";
+import template from "lodash/template.js";
+
+const log = logging.create(import.meta.url);
+
+export const description = "Describe your command here."
+
+// your command uses the npm package commander's options format
+export const options = [
+  ["--input <string>", "A string option with a default.", "default.json"],
+  ["--min <number>", "A number option, no default."],
+]
+
+// put required options in the required variable
+export const required = [
+  ["--output <string>", "Save to file rather than stdout."],
+]
+
+// handy function for checking things are good and aborting
+const check = (test, fail_message) => {
+  if(!test) {
+    log.error(fail_message);
+    process.exit(1);
+  }
+}
+
+export const main = async (opts) => {
+  // if they give an numeric option this is how you can convert it
+  // yes, this is annoying and commander should handle it but oh well
+  if(opts.min !== undefined) {
+    // commander doesn't do integer conversions sadly
+    opts.min = parseInt(opts.min, 10);
+    check(!isNaN(opts.min), "--min must be a number");
+  }
+
+  // it's easier to debug options with console
+  console.log("OPTIONS", opts);
+
+  // due to how async/await works it's just easier to manually exit with exit codes
+  process.exit(0);
+}
diff --git a/static/djenterator/command.js.vars b/static/djenterator/command.js.vars
new file mode 100644
index 0000000..0967ef4
--- /dev/null
+++ b/static/djenterator/command.js.vars
@@ -0,0 +1 @@
+{}