script to generate a simple man page (#150)

scripts/man.py

@@ -0,0 +1,109 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+# Copyright 2019 Mike Fährmann
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+
+import sys
+import os.path
+import datetime
+
+ROOTDIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+sys.path.insert(0, os.path.realpath(ROOTDIR))
+
+import gallery_dl.option  # noqa
+import gallery_dl.version  # noqa
+
+
+TEMPLATE = r""".TH "gallery-dl" "1" "$(date)s" "$(version)s" ""
+.\" disable hyphenation
+.nh
+
+.SH NAME
+gallery-dl \- download image-galleries and -collections
+
+.SH SYNOPSIS
+.B gallery-dl
+[OPTION]... URL...
+
+.SH DESCRIPTION
+.B gallery-dl
+is a command-line program to download image-galleries and -collections
+from several image hosting sites. It is a cross-platform tool
+with many configuration options and powerful filenaming capabilities.
+
+.SH OPTIONS
+%(options)s
+
+.SH EXAMPLES
+.TP
+gallery-dl \f[I]URL\f[]
+Download images from \f[I]URL\f[].
+.TP
+gallery-dl -g -u <username> -p <password> \f[I]URL\f[]
+Print direct URLs from a site that requires authentication.
+.TP
+gallery-dl --filter 'type == "ugoira"' --range '2-4' \f[I]URL\f[]
+Apply filter and range expressions. This will only download
+the second, third, and fourth file where its type value is equal to "ugoira".
+.TP
+gallery-dl r:\f[I]URL\f[]
+Scan \f[I]URL\f[] for other URLs and invoke \f[B]gallery-dl\f[] on them.
+.TP
+gallery-dl oauth:\f[I]SITE\-NAME\f[]
+Gain OAuth authentication tokens for
+.IR deviantart ,
+.IR  flickr ,
+.IR reddit ,
+.IR smugmug ", and"
+.IR tumblr .
+
+.SH FILES
+.TP
+.I /etc/gallery-dl.conf
+The system wide configuration file.
+.TP
+.I ~/.config/gallery-dl/config.json
+Per user configuration file.
+.TP
+.I ~/.gallery-dl.conf
+Alternate per user configuration file.
+
+.SH BUGS
+https://github.com/mikf/gallery-dl/issues
+
+.SH AUTHORS
+Mike Fährmann <mike_faehrmann@web.de>
+.br
+and https://github.com/mikf/gallery-dl/graphs/contributors
+
+.SH "SEE ALSO"
+.BR gallery-dl.conf (5)
+"""
+
+OPTS_FMT = r""".TP
+.B "{}" {}
+{}
+"""
+
+
+options = []
+for action in gallery_dl.option.build_parser()._actions:
+    if action.help.startswith("=="):
+        continue
+    options.append(OPTS_FMT.format(
+        ", ".join(action.option_strings).replace("-", r"\-"),
+        r"\f[I]{}\f[]".format(action.metavar) if action.metavar else "",
+        action.help,
+    ))
+
+PATH = os.path.join(ROOTDIR, "gallery-dl.1")
+with open(PATH, "w", encoding="utf-8") as file:
+    file.write(TEMPLATE % {
+        "options": "\n".join(options),
+        "version": gallery_dl.version.__version__,
+        "date"   : datetime.datetime.now(),
+    })