Initial commit: 50 shell-script generators with web UI
- 8 categories / 50 generators covering middleware, databases, runtimes, systemd services, system tools, network, monitoring, security - VNC supports XFCE / GNOME / KDE Plasma / MATE / LXQt desktops - Node.js versions 18-26 (incl. current LTS 24 Krypton and current 26) - Live preview, copy / download / multi-script bundle in web UI - Distro-aware (Ubuntu/Debian/CentOS/RHEL/Rocky/Alma/Fedora) - All 50 generators pass bash -n syntax check - Zero pip dependencies (Flask stdlib only)
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cnbug
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"""
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Shell Generator - One-click Linux shell script generator
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Single-file Flask app + dedicated generator modules.
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"""
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import os
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import io
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import zipfile
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import datetime
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import subprocess
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from pathlib import Path
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from flask import (Flask, render_template, request, jsonify, Response,
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send_file, abort, redirect, url_for, session, flash)
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# Import all generator modules so they self-register via @register
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from generators import ( # noqa: F401
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list_generators, get_generator, get_categories,
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category_labels, category_icons,
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)
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from generators.middleware import * # noqa: F401 (registers)
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from generators.runtimes import * # noqa: F401
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from generators.systemd_svc import * # noqa: F401
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from generators.system import * # noqa: F401
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from generators.network import * # noqa: F401
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from generators.databases import * # noqa: F401
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from generators.monitoring import * # noqa: F401
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BASE_DIR = Path(__file__).parent
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app = Flask(__name__, instance_path=str(BASE_DIR / "instance"))
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app.config["SECRET_KEY"] = os.environ.get("SHELLGEN_SECRET", "shell-gen-default-secret-change-me")
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app.config["JSON_AS_ASCII"] = False
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# ----------------------------- Routes -----------------------------
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@app.route("/")
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def index():
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return render_template(
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"index.html",
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categories=get_categories(),
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category_labels=category_labels,
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category_icons=category_icons,
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total=len(list_generators()),
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)
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@app.route("/gen/<generator_id>")
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def generator_page(generator_id):
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gen = get_generator(generator_id)
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if gen is None:
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abort(404, f"Unknown generator: {generator_id}")
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return render_template(
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"generator.html",
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gen=gen,
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category_labels=category_labels,
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category_icons=category_icons,
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all_cats=get_categories(),
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)
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@app.route("/api/preview", methods=["POST"])
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def api_preview():
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"""Generate script preview without running anything."""
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data = request.get_json(silent=True) or {}
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gen_id = data.get("generator")
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params = data.get("params", {})
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gen = get_generator(gen_id) if gen_id else None
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if gen is None:
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return jsonify({"ok": False, "error": f"Unknown generator: {gen_id}"}), 400
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try:
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script = gen.render(params)
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except Exception as e:
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return jsonify({"ok": False, "error": f"{type(e).__name__}: {e}"}), 400
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return jsonify({
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"ok": True,
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"script": script,
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"title": gen.title,
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"description": gen.description,
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"warnings": gen.warnings,
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"post_steps": gen.post_steps,
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"verify_steps": gen.verify_steps,
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})
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@app.route("/api/download", methods=["POST"])
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def api_download():
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data = request.get_json(silent=True) or {}
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gen_id = data.get("generator")
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params = data.get("params", {})
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gen = get_generator(gen_id) if gen_id else None
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if gen is None:
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return jsonify({"ok": False, "error": f"Unknown generator: {gen_id}"}), 400
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try:
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script = gen.render(params)
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except Exception as e:
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return jsonify({"ok": False, "error": f"{type(e).__name__}: {e}"}), 400
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fname = f"{gen_id}.sh"
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headers = {"Content-Disposition": f'attachment; filename="{fname}"'}
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return Response(script, mimetype="text/x-shellscript", headers=headers)
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@app.route("/api/bundle", methods=["POST"])
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def api_bundle():
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"""Bundle multiple generators into a single zip of .sh files."""
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data = request.get_json(silent=True) or {}
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items = data.get("items", [])
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buf = io.BytesIO()
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with zipfile.ZipFile(buf, "w", zipfile.ZIP_DEFLATED) as z:
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for entry in items:
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gid = entry.get("generator")
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params = entry.get("params", {})
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gen = get_generator(gid)
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if gen is None:
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continue
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try:
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script = gen.render(params)
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except Exception as e:
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script = f"#!/usr/bin/env bash\necho 'ERROR generating {gid}: {e}'\nexit 1\n"
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z.writestr(f"{gid}.sh", script)
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# Master installer
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master = ["#!/usr/bin/env bash", "set -e", "# Auto-generated by shell-gen"]
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for entry in items:
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gid = entry.get("generator")
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if get_generator(gid) is None:
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continue
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master.append(f'echo "===> {gid}"')
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master.append(f"bash \"$(dirname \"$0\")/{gid}.sh\"")
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z.writestr("install-all.sh", "\n".join(master) + "\n")
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buf.seek(0)
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return send_file(buf, mimetype="application/zip", as_attachment=True,
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download_name=f"shell-gen-bundle-{datetime.datetime.now():%Y%m%d-%H%M%S}.zip")
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@app.route("/api/categories")
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def api_categories():
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out = []
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for cat in get_categories():
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gens = [g for g in list_generators().values() if g.category == cat]
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out.append({
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"id": cat,
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"label": category_labels.get(cat, cat),
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"icon": category_icons.get(cat, "📦"),
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"items": [g.summary() for g in gens],
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})
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return jsonify({"ok": True, "categories": out})
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@app.route("/healthz")
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def healthz():
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return jsonify({"ok": True, "generators": len(list_generators())})
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if __name__ == "__main__":
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os.makedirs(app.instance_path, exist_ok=True)
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with app.app_context():
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# Touch a db-less startup log
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pass
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port = int(os.environ.get("PORT", 5099))
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app.run(host="0.0.0.0", port=port, debug=False)
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