rev: a4d63082308377e92b21f76d6f977b11672090b6 poole/poole.py -rwxr-xr-x 25.5 KiB View raw Log this file
a4d630823083 — Oben Sonne Remove minor redundancies in macros importing 4 months ago
                                                                                
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#!/usr/bin/env python
# -*- coding: utf-8 -*-

# =============================================================================
#
#    Poole - A damn simple static website generator.
#    Copyright (C) 2012 Oben Sonne <obensonne@googlemail.com>
#
#    This file is part of Poole.
#
#    Poole is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    Poole is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with Poole.  If not, see <http://www.gnu.org/licenses/>.
#
# =============================================================================

import glob
import importlib
import importlib.util
import optparse
import os
from os.path import join as opj
from os.path import exists as opx
import re
import shutil
import io
import sys
import traceback
import urllib.parse

from http.server import SimpleHTTPRequestHandler
from http.server import HTTPServer

import markdown

UTF8 = 'UTF8'

HERE = os.path.dirname(os.path.realpath(__file__))

THEME_DIR = opj(HERE, 'themes')

THEME_NAMES = ['minimal'] + [
    os.path.basename(x)
    for x in glob.glob(opj(THEME_DIR, '*'))
    if os.path.isdir(x)
]

# =============================================================================
# init site
# =============================================================================

EXAMPLE_FILES =  {

"page.html": """<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf8" />
    <title>poole - {{ hx(page["title"]) }}</title>
    <meta name="description" content="{{ hx(page.get("description", "a poole site")) }}" />
    <meta name="keywords" content="{{ hx(page.get("keywords", "poole")) }}" />
    <style type="text/css">
        body {
            font-family: sans;
            width: 800px;
            margin: 1em auto;
            color: #2e3436;
        }
        div#box {
        }
        div#header, div#menu, div#content, div#footer {
            padding: 1em;
        }
        div#menu {
            background-color: #eeeeec;
            padding: 0.6em 0 0.6em 0;
        }
        #menu span {
            font-weight: bold;
            padding: 0.6em;
        }
        #menu span.current {
            background-color: #ffffff;
            border: 1px solid #eeeeec;
        }
        #menu a {
            color: #000000;
            text-decoration: none;
        }
        div#footer {
            color: gray;
            text-align: center;
            font-size: small;
        }
        div#footer a {
            color: gray;
            text-decoration: none;
        }
        pre {
            border: dotted black 1px;
            background: #eeeeec;
            font-size: small;
            padding: 1em;
        }
    </style>
</head>
<body>
    <div id="box">
    <div id="header">
         <h1>a poole site</h1>
         <h2>{{ hx(page["title"]) }}</h2>
    </div>
    <div id="menu">
    <!--%
        mpages = [p for p in pages if "menu-position" in p]
        mpages.sort(key=lambda p: int(p["menu-position"]))
        entry = '<span class="%s"><a href="%s">%s</a></span>'
        for p in mpages:
            style = "current" if p["title"] == page["title"] else ""
            print(entry % (style, p["url"], hx(p["title"])))
    %-->
    </div>
    <div id="content">{{ __content__ }}</div>
    </div>
    <div id="footer">
        Built with <a href="http://bitbucket.org/obensonne/poole">Poole</a>
        &middot;
        Licensed as <a href="http://creativecommons.org/licenses/by-sa/3.0">CC-SA</a>
        &middot;
        <a href="http://validator.w3.org/check?uri=referer">Validate me</a>
    </div>
</body>
</html>
""",

# -----------------------------------------------------------------------------

opj("input", "index.md"): """
title: home
menu-position: 0
---

## Welcome to Poole

In Poole you write your pages in [markdown][md]. It's easier to write
markdown than HTML.

Poole is made for simple websites you just want to get done, without installing
a bunch of requirements and without learning a template engine.

In a build, Poole copies every file from the *input* directory to the *output*
directory. During that process every markdown file (ending with *md*, *mkd*,
*mdown* or *markdown*) is converted to HTML using the project's `page.html`
as a skeleton.

[md]: http://daringfireball.net/projects/markdown/
""",

# -----------------------------------------------------------------------------

opj("input", "logic.md"): """
menu-position: 4
---
Poole has basic support for content generation using Python code inlined in
page files. This is everything but a clear separation of logic and content but
for simple sites this is just a pragmatic way to get things done fast.
For instance the menu on this page is generated by some inlined Python code in
the project's `page.html` file.

Just ignore this feature if you don't need it :)

Content generation by inlined Python code is good to add some zest to your
site. If you use it a lot, you better go with more sophisticated site
generators like [Hyde](http://ringce.com/hyde).
""",

# -----------------------------------------------------------------------------

opj("input", "layout.md"): """
menu-position: 3
---
Every page of a poole site is based on *one global template file*, `page.html`.
All you need to adjust the site layout is to edit the page template
`page.html`.
""",

opj("input", "blog.md"): """
menu-position: 10
---
Poole has basic blog support. If an input page's file name has a structure like
`page-title.YYYY-MM-DD.post-title.md`, e.g. `blog.2010-02-27.read_this.md`,
Poole recognizes the date and post title and sets them as attributes of the
page. These attributes can then be used to generate a list of blog posts:

<!--%
from datetime import datetime
posts = [p for p in pages if "post" in p] # get all blog post pages
posts.sort(key=lambda p: p.get("date"), reverse=True) # sort post pages by date
for p in posts:
    date = datetime.strptime(p.date, "%Y-%m-%d").strftime("%B %d, %Y")
    print("  * **[%s](%s)** - %s" % (p.post, p.url, date)) # markdown list item
%-->

Have a look into `input/blog.md` to see how it works. Feel free to adjust it
to your needs.
""",

# -----------------------------------------------------------------------------

opj("input", "blog.2013-04-08.Lorem_Ipsum.md") : """

---
## {{ page["post"] }}

*Posted at
<!--%
from datetime import datetime
print(datetime.strptime(page["date"], "%Y-%m-%d").strftime("%B %d, %Y"))
%-->*

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed sed pretium arcu.
Nullam eu leo ut justo egestas condimentum sed id dolor. In suscipit est eu
tellus lacinia congue. Nunc tincidunt posuere nibh vitae accumsan. Suspendisse
quis justo quis nulla rhoncus venenatis. Cum sociis natoque penatibus et magnis
dis parturient montes, nascetur ridiculus mus. Suspendisse potenti.

Nullam luctus tortor ac libero eleifend interdum nec eget dolor. Aliquam quis
massa metus, id fringilla odio. Fusce lobortis sollicitudin gravida. Donec
porttitor metus aliquam diam consectetur vitae tristique ligula aliquet. Nulla
facilisi. Mauris eleifend erat id velit eleifend facilisis. Proin orci lacus,
imperdiet eu mollis ac, cursus sit amet ligula. Ut id neque urna, sed dignissim
urna. Cras sit amet sodales orci. In at lacus dui. Duis mi neque, posuere ut
congue non, ornare a magna. Fusce massa ligula, vestibulum sed vulputate quis,
sodales at massa.

No-ASCII characters like `öäüß` are no problems as long as input files are
encoded in UTF8.
""",

# -----------------------------------------------------------------------------

opj("input", "blog.2013-04-01.Holy_Grail.md"): """

## {{ page["post"] }}

*Posted at <!--{ page["date"] }-->.*

Knights of Ni, we are but simple travelers who seek the enchanter who lives
beyond these woods. A newt? Did you dress her up like this? On second thoughts,
let's not go there. It is a silly place. You don't vote for kings. Knights of
Ni, we are but simple travelers who seek the enchanter who lives beyond these
woods.

### Bridgekeeper ###

Camelot! What do you mean? And this isn't my nose. This is a false one. Ah, now
we see the violence inherent in the system!

You don't frighten us, English pig-dogs! Go and boil your bottoms, sons of a
silly person! I blow my nose at you, so-called Ah-thoor Keeng, you and all your
silly English K-n-n-n-n-n-n-n-niggits! I don't want to talk to you no more, you
empty-headed animal food trough water! I fart in your general direction! Your
mother was a hamster and your father smelt of elderberries! Now leave before I
am forced to taunt you a second time! Shh! Knights, I bid you welcome to your
new home. Let us ride to Camelot! Now, look here, my good man.

### What a strange ###

She looks like one. Why do you think that she is a witch? Look, my liege! Bring
her forward!

[Ni!](http://chrisvalleskey.com/fillerama/)
"""
}

def init(project, theme):
    """Initialize a site project."""

    if not opx(project):
        os.makedirs(project)

    if os.listdir(project):
        print("abort  : project dir %s is not empty" % project)
        sys.exit(1)

    dir_in = opj(project, "input")
    dir_out = opj(project, "output")

    os.mkdir(dir_in)
    os.mkdir(dir_out)

    for fname, content in EXAMPLE_FILES.items():
        print('info: create example %r' % fname)
        with open(opj(project, fname), 'w', encoding=UTF8) as fp:
            fp.write(content)

    if theme != 'minimal':
        shutil.copy(opj(THEME_DIR, theme, 'page.html'), project)
        for fname in glob.glob(opj(THEME_DIR, theme, '*')):
            print('info: copy theme data %r' % fname)
            if os.path.basename(fname) == 'page.html':
                continue
            if os.path.isdir(fname):
                shutil.copytree(fname, opj(dir_in, os.path.basename(fname)))
            else:
                shutil.copy(fname, dir_in)

    print("success: initialized project")

# =============================================================================
# build site
# =============================================================================

MKD_PATT = r'\.(?:md|mkd|mdown|markdown)$'

def hx(s):
    """
    Replace the characters that are special within HTML (&, <, > and ")
    with their equivalent character entity (e.g., &amp;). This should be
    called whenever an arbitrary string is inserted into HTML (so in most
    places where you use {{ variable }} in your templates).

    Note that " is not special in most HTML, only within attributes.
    However, since escaping it does not hurt within normal HTML, it is
    just escaped unconditionally.
    """
    if getattr(s, 'escaped', False):
        return s

    escape = {
        "&": "&amp;",
        '"': "&quot;",
        ">": "&gt;",
        "<": "&lt;",
    }
    return ''.join(escape.get(c, c) for c in s)

class Page(dict):
    """Abstraction of a source page."""

    _template = None # template dictionary
    _opts = None # command line options
    _pstrip = None # path prefix to strip from (non-virtual) page file names

    _re_eom = re.compile(r'^---+ *\r?\n?$')
    _re_vardef = re.compile(r'^([^\n:=]+?)[:=]((?:.|\n )*)', re.MULTILINE)
    _sec_macros = "macros"
    _modmacs = None

    def __init__(self, fname, virtual=None, **attrs):
        """Create a new page.

        Page content is read from `fname`, except when `virtual` is given (a
        string representing the raw content of a virtual page).

        The filename refers to the page source file. For virtual pages, this
        *must* be relative to a projects input directory.

        Virtual pages may contain page attribute definitions similar to real
        pages. However, it probably is easier to provide the attributes
        directly. This may be done using arbitrary keyword arguments.

        """
        super(Page, self).__init__()

        self.update(self._template)
        self.update(attrs)

        self._virtual = virtual is not None

        fname = opj(self._pstrip, fname) if virtual else fname

        self["fname"] = fname

        self["url"] = re.sub(MKD_PATT, ".html", fname)
        self["url"] = self["url"][len(self._pstrip):].lstrip(os.path.sep)
        self["url"] = self["url"].replace(os.path.sep, "/")

        if virtual:
            self.raw = virtual
        else:
            with open(fname, 'r', encoding=UTF8) as fp:
                self.raw = fp.readlines()

        # split raw content into macro definitions and real content
        vardefs = ""
        self.source = ""
        for line in self.raw:
            if not vardefs and self._re_eom.match(line):
                vardefs = self.source
                self.source = "" # only macro defs until here, reset source
            else:
                self.source += line

        for key, val in self._re_vardef.findall(vardefs):
            key = key.strip()
            val = val.strip()
            val = re.sub(r' *\n +', ' ', val) # clean out line continuation
            self[key] = val

        basename = os.path.basename(fname)

        fpatt = r'(.+?)(?:\.([0-9]+-[0-9]+-[0-9]+)(?:\.(.*))?)?%s' % MKD_PATT
        title, date, post = re.match(fpatt, basename).groups()
        title = title.replace("_", " ")
        post = post and post.replace("_", " ") or None
        self["title"] = self.get("title", title)
        if date and "date" not in self: self["date"] = date
        if post and "post" not in self: self["post"] = post

        self.html = ""

    def __getattr__(self, name):
        """Attribute-style access to dictionary items."""
        try:
            return self[name]
        except KeyError:
            raise AttributeError(name)

    def __str__(self):
        """Page representation by file name."""
        return ('%s (virtual)' % self.fname) if self._virtual else self.fname

# -----------------------------------------------------------------------------

def build(project, opts):
    """Build a site project."""

    # -------------------------------------------------------------------------
    # utilities
    # -------------------------------------------------------------------------

    def abort_iex(page, itype, inline, exc):
        """Abort because of an exception in inlined Python code."""
        print("abort  : Python %s in %s failed" % (itype, page))
        print((" %s raising the exception " % itype).center(79, "-"))
        print(inline)
        print(" exception ".center(79, "-"))
        print(exc)
        sys.exit(1)

    # -------------------------------------------------------------------------
    # regex patterns and replacements
    # -------------------------------------------------------------------------

    regx_escp = re.compile(r'\\((?:(?:&lt;|<)!--|{)(?:{|%))') # escaped code
    repl_escp = r'\1'
    regx_rurl = re.compile(r'(?<=(?:(?:\n| )src|href)=")([^#/&%].*?)(?=")')
    repl_rurl = lambda m: urllib.parse.urljoin(opts.base_url, m.group(1))

    regx_eval = re.compile(r'(?<!\\)(?:(?:<!--|{){)(.*?)(?:}(?:-->|}))', re.S)

    def repl_eval(m):
        """Replace a Python expression block by its evaluation."""

        expr = m.group(1)
        try:
            repl = eval(expr, macros.copy())
        except:
            abort_iex(page, "expression", expr, traceback.format_exc())
        else:
            return str(repl)

    regx_exec = re.compile(r'(?<!\\)(?:(?:<!--|{)%)(.*?)(?:%(?:-->|}))', re.S)

    def repl_exec(m):
        """Replace a block of Python statements by their standard output."""

        stmt = m.group(1).replace("\r\n", "\n")

        # base indentation
        ind_lvl = len(re.findall(r'^(?: *\n)*( *)', stmt, re.MULTILINE)[0])
        ind_rex = re.compile(r'^ {0,%d}' % ind_lvl, re.MULTILINE)
        stmt = ind_rex.sub('', stmt)

        # execute
        sys.stdout = io.StringIO()
        try:
            exec(stmt, macros.copy())
        except:
            sys.stdout = sys.__stdout__
            abort_iex(page, "statements", stmt, traceback.format_exc())
        else:
            repl = sys.stdout.getvalue()[:-1] # remove last line break
            sys.stdout = sys.__stdout__
            return repl

    # -------------------------------------------------------------------------
    # preparations
    # -------------------------------------------------------------------------

    dir_in = opj(project, "input")
    dir_out = opj(project, "output")
    page_html = opj(project, "page.html")

    # check required files and folders
    for pelem in (page_html, dir_in, dir_out):
        if not opx(pelem):
            print("abort  : %s does not exist, looks like project has not been "
                  "initialized" % pelem)
            sys.exit(1)

    # prepare output directory
    if not opts.dry_run:
        for fod in glob.glob(opj(dir_out, "*")):
            if os.path.isdir(fod):
                shutil.rmtree(fod)
            else:
                os.remove(fod)
        if not opx(dir_out):
            os.mkdir(dir_out)

    # macro module
    fname = opj(opts.project, "macros.py")
    if opx(fname):
        spec = importlib.util.spec_from_file_location("macros", fname)
        module = importlib.util.module_from_spec(spec)
        sys.modules["macros"] = module
        spec.loader.exec_module(module)
        macros = module.__dict__
    else:
        macros = {}

    macros["options"] = opts
    macros["project"] = project
    macros["input"] = dir_in
    macros["output"] = dir_out

    # "builtin" items for use in macros and templates
    macros["hx"] = hx
    macros["htmlspecialchars"] = hx # legacy name of `htmlx` function
    macros["Page"] = Page

    # -------------------------------------------------------------------------
    # process input files
    # -------------------------------------------------------------------------

    Page._template = macros.get("page", {})
    Page._opts = opts
    Page._pstrip = dir_in
    pages = []
    custom_converter = macros.get('converter', {})

    for cwd, dirs, files in os.walk(dir_in):
        cwd_site = cwd[len(dir_in):].lstrip(os.path.sep)
        if not opts.dry_run:
            for sdir in dirs[:]:
                if re.search(opts.ignore, opj(cwd_site, sdir)):
                    dirs.remove(sdir)
                else:
                    os.mkdir(opj(dir_out, cwd_site, sdir))
        for f in files:
            if re.search(opts.ignore, opj(cwd_site, f)):
                pass
            elif re.search(MKD_PATT, f):
                page = Page(opj(cwd, f))
                pages.append(page)
            else:
                # either use a custom converter or do a plain copy
                for patt, (func, ext) in custom_converter.items():
                    if re.search(patt, f):
                        f_src = opj(cwd, f)
                        f_dst = opj(dir_out, cwd_site, f)
                        f_dst = '%s.%s' % (os.path.splitext(f_dst)[0], ext)
                        print('info   : convert %s (%s)' %
                            (f_src, func.__name__))
                        if not opts.dry_run:
                            func(f_src, f_dst)
                        break
                else:
                    if not opts.dry_run:
                        src = opj(cwd, f)
                        try:
                            shutil.copy(src, opj(dir_out, cwd_site))
                        except OSError:
                            # some filesystems like FAT won't allow shutil.copy
                            shutil.copyfile(src, opj(dir_out, cwd_site, f))

    pages.sort(key=lambda p: int(p.get("sval", "0")))

    macros["pages"] = pages

    # -------------------------------------------------------------------------
    # run pre-convert hooks in macro module (named 'once' before)
    # -------------------------------------------------------------------------

    hooks = [a for a in macros if re.match(r'hook_preconvert_|once_', a)]
    for fn in sorted(hooks):
        macros[fn]()

    # -------------------------------------------------------------------------
    # convert pages (markdown to HTML)
    # -------------------------------------------------------------------------

    for page in pages:

        print("info   : convert %s" % page)

        # replace expressions and statements in page source
        macros["page"] = page
        out = regx_eval.sub(repl_eval, page.source)
        out = regx_exec.sub(repl_exec, out)

        # convert to HTML
        page.html = markdown.Markdown(extensions=opts.md_ext).convert(out)

    # -------------------------------------------------------------------------
    # run post-convert hooks in macro module
    # -------------------------------------------------------------------------

    hooks = [a for a in macros if a.startswith("hook_postconvert_")]
    for fn in sorted(hooks):
        macros[fn]()

    # -------------------------------------------------------------------------
    # render complete HTML pages
    # -------------------------------------------------------------------------

    with open(opj(project, "page.html"), 'r', encoding=UTF8) as fp:
        default_template = fp.read()

    for page in pages:

        if 'template' in page:
            fname = opj(project, page['template'])
            with open(fname, 'r', opts.input_enc) as fp:
                template = fp.read()
        else:
            template = default_template

        print("info   : render %s" % page.url)

        # replace expressions and statements in page.html
        macros["page"] = page
        macros["__content__"] = page.html
        out = regx_eval.sub(repl_eval, template)
        out = regx_exec.sub(repl_exec, out)

        # un-escape escaped python code blocks
        out = regx_escp.sub(repl_escp, out)

        # make relative links absolute
        out = regx_rurl.sub(repl_rurl, out)

        # write HTML page
        fname = page.fname.replace(dir_in, dir_out)
        fname = re.sub(MKD_PATT, ".html", fname)
        if not opts.dry_run:
            with open(fname, 'w', encoding=UTF8) as fp:
                fp.write(out)

    if opts.dry_run:
        print("success: built project (dry-run)")
    else:
        print("success: built project")

# =============================================================================
# serve site
# =============================================================================

def serve(project, port):
    """Temporary serve a site project."""

    root = opj(project, "output")
    if not os.listdir(project):
        print("abort  : output dir is empty (build project first!)")
        sys.exit(1)

    os.chdir(root)
    server = HTTPServer(('', port), SimpleHTTPRequestHandler)
    server.serve_forever()

# =============================================================================
# options
# =============================================================================

def options():
    """Parse and validate command line arguments."""

    usage = ("Usage: %prog --init  [OPTIONS] [path/to/project]\n"
             "       %prog --build [OPTIONS] [path/to/project]\n"
             "       %prog --serve [OPTIONS] [path/to/project]\n"
             "\n"
             "       Project path is optional, '.' is used as default.")

    op = optparse.OptionParser(usage=usage)

    op.add_option("-i" , "--init", action="store_true", default=False,
                  help="init project")
    op.add_option("-b" , "--build", action="store_true", default=False,
                  help="build project")
    op.add_option("-s" , "--serve", action="store_true", default=False,
                  help="serve project")

    og = optparse.OptionGroup(op, "Init options")
    og.add_option("", "--theme", type="choice", default="minimal",
                  choices=THEME_NAMES,
                  help="theme for a new project (choices: %s)" %
                    ', '.join(THEME_NAMES))
    op.add_option_group(og)

    og = optparse.OptionGroup(op, "Build options")
    og.add_option("", "--base-url", default="/", metavar="URL",
                  help="base url for relative links (default: /)")
    og.add_option("" , "--ignore", default=r"^\.|~$", metavar="REGEX",
                  help="input files to ignore (default: '^\.|~$')")
    og.add_option("" , "--md-ext", default=[], metavar="EXT",
                  action="append", help="enable a markdown extension")
    og.add_option("" , "--dry-run", action="store_true", default=False,
                  help="go through the rendering process without actually "
                    "outputting/deleting any files")
    op.add_option_group(og)

    og = optparse.OptionGroup(op, "Serve options")
    og.add_option("" , "--port", default=8080,
                  metavar="PORT", type="int",
                  help="port for serving (default: 8080)")
    op.add_option_group(og)

    opts, args = op.parse_args()

    if opts.init + opts.build + opts.serve < 1:
        op.print_help()
        op.exit()

    opts.project = args and args[0] or "."

    return opts

# =============================================================================
# main
# =============================================================================

def main():

    opts = options()

    if opts.init:
        init(opts.project, opts.theme)
    if opts.build:
        build(opts.project, opts)
    if opts.serve:
        serve(opts.project, opts.port)

if __name__ == '__main__':

    main()