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417 lines
15 KiB
Python
417 lines
15 KiB
Python
#! /usr/bin/env python
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from argparse import ArgumentParser
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from docutils.core import publish_file
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import copy
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import fileinput
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import glob
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import os
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import re
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import shutil
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import subprocess
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import sys
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import yaml
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os.chdir(os.path.dirname(os.path.abspath(__file__)))
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stylesheets = {
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"stylesheet_path": ["basic.css", "nature.css", "codehighlight.css"]
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}
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VERBOSE = False
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"""
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Read a RST file and replace titles with a different title level if required.
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Args:
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filename: The name of the file being read (for debugging)
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file_stream: The open file stream to read from.
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title_level: The integer which determines the offset to *start* from.
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title_styles: An array of characters detailing the right title styles to use
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e.g. ["=", "-", "~", "+"]
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Returns:
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string: The file contents with titles adjusted.
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Example:
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Assume title_styles = ["=", "-", "~", "+"], title_level = 1, and the file
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when read line-by-line encounters the titles "===", "---", "---", "===", "---".
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This function will bump every title encountered down a sub-heading e.g.
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"=" to "-" and "-" to "~" because title_level = 1, so the output would be
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"---", "~~~", "~~~", "---", "~~~". There is no bumping "up" a title level.
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"""
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def load_with_adjusted_titles(filename, file_stream, title_level, title_styles):
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rst_lines = []
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title_chars = "".join(title_styles)
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title_regex = re.compile("^[" + re.escape(title_chars) + "]{3,}$")
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prev_line_title_level = 0 # We expect the file to start with '=' titles
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file_offset = None
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prev_non_title_line = None
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for i, line in enumerate(file_stream, 1):
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# ignore anything which isn't a title (e.g. '===============')
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if not title_regex.match(line):
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rst_lines.append(line)
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prev_non_title_line = line
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continue
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# The title underline must match at a minimum the length of the title
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if len(prev_non_title_line) > len(line):
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rst_lines.append(line)
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prev_non_title_line = line
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continue
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line_title_style = line[0]
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line_title_level = title_styles.index(line_title_style)
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# Not all files will start with "===" and we should be flexible enough
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# to allow that. The first title we encounter sets the "file offset"
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# which is added to the title_level desired.
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if file_offset is None:
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file_offset = line_title_level
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if file_offset != 0:
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logv((" WARNING: %s starts with a title style of '%s' but '%s' " +
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"is preferable.") % (filename, line_title_style, title_styles[0]))
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# Sanity checks: Make sure that this file is obeying the title levels
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# specified and bail if it isn't.
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# The file is allowed to go 1 deeper or any number shallower
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if prev_line_title_level - line_title_level < -1:
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raise Exception(
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("File '%s' line '%s' has a title " +
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"style '%s' which doesn't match one of the " +
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"allowed title styles of %s because the " +
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"title level before this line was '%s'") %
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(filename, (i + 1), line_title_style, title_styles,
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title_styles[prev_line_title_level])
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)
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prev_line_title_level = line_title_level
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adjusted_level = (
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title_level + line_title_level - file_offset
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)
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# Sanity check: Make sure we can bump down the title and we aren't at the
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# lowest level already
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if adjusted_level >= len(title_styles):
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raise Exception(
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("Files '%s' line '%s' has a sub-title level too low and it " +
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"cannot be adjusted to fit. You can add another level to the " +
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"'title_styles' key in targets.yaml to fix this.") %
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(filename, (i + 1))
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)
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if adjusted_level == line_title_level:
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# no changes required
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rst_lines.append(line)
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continue
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# Adjusting line levels
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logv(
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"File: %s Adjusting %s to %s because file_offset=%s title_offset=%s" %
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(filename, line_title_style, title_styles[adjusted_level],
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file_offset, title_level)
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)
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rst_lines.append(line.replace(
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line_title_style,
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title_styles[adjusted_level]
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))
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return "".join(rst_lines)
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def get_rst(file_info, title_level, title_styles, spec_dir, adjust_titles):
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# string are file paths to RST blobs
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if isinstance(file_info, basestring):
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log("%s %s" % (">" * (1 + title_level), file_info))
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with open(os.path.join(spec_dir, file_info), "r") as f:
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rst = None
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if adjust_titles:
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rst = load_with_adjusted_titles(
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file_info, f, title_level, title_styles
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)
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else:
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rst = f.read()
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rst += "\n\n"
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return rst
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# dicts look like {0: filepath, 1: filepath} where the key is the title level
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elif isinstance(file_info, dict):
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levels = sorted(file_info.keys())
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rst = []
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for l in levels:
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rst.append(get_rst(file_info[l], l, title_styles, spec_dir, adjust_titles))
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return "".join(rst)
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# lists are multiple file paths e.g. [filepath, filepath]
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elif isinstance(file_info, list):
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rst = []
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for f in file_info:
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rst.append(get_rst(f, title_level, title_styles, spec_dir, adjust_titles))
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return "".join(rst)
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raise Exception(
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"The following 'file' entry in this target isn't a string, list or dict. " +
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"It really really should be. Entry: %s" % (file_info,)
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)
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def build_spec(target, out_filename):
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with open(out_filename, "wb") as outfile:
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for file_info in target["files"]:
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section = get_rst(
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file_info=file_info,
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title_level=0,
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title_styles=target["title_styles"],
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spec_dir="../specification/",
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adjust_titles=True
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)
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outfile.write(section)
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"""
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Replaces relative title styles with actual title styles.
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The templating system has no idea what the right title style is when it produces
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RST because it depends on the build target. As a result, it uses relative title
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styles defined in targets.yaml to say "down a level, up a level, same level".
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This function replaces these relative titles with actual title styles from the
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array in targets.yaml.
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"""
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def fix_relative_titles(target, filename, out_filename):
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title_styles = target["title_styles"]
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relative_title_chars = [
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target["relative_title_styles"]["subtitle"],
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target["relative_title_styles"]["sametitle"],
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target["relative_title_styles"]["supertitle"]
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]
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relative_title_matcher = re.compile(
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"^[" + re.escape("".join(relative_title_chars)) + "]{3,}$"
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)
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title_matcher = re.compile(
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"^[" + re.escape("".join(title_styles)) + "]{3,}$"
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)
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current_title_style = None
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with open(filename, "r") as infile:
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with open(out_filename, "w") as outfile:
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for line in infile.readlines():
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if not relative_title_matcher.match(line):
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if title_matcher.match(line):
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current_title_style = line[0]
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outfile.write(line)
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continue
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line_char = line[0]
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replacement_char = None
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current_title_level = title_styles.index(current_title_style)
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if line_char == target["relative_title_styles"]["subtitle"]:
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if (current_title_level + 1) == len(title_styles):
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raise Exception(
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"Encountered sub-title line style but we can't go " +
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"any lower."
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)
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replacement_char = title_styles[current_title_level + 1]
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elif line_char == target["relative_title_styles"]["sametitle"]:
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replacement_char = title_styles[current_title_level]
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elif line_char == target["relative_title_styles"]["supertitle"]:
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if (current_title_level - 1) < 0:
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raise Exception(
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"Encountered super-title line style but we can't go " +
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"any higher."
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)
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replacement_char = title_styles[current_title_level - 1]
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else:
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raise Exception(
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"Unknown relative line char %s" % (line_char,)
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)
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outfile.write(
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line.replace(line_char, replacement_char)
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)
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def rst2html(i, o):
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with open(i, "r") as in_file:
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with open(o, "w") as out_file:
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publish_file(
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source=in_file,
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destination=out_file,
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reader_name="standalone",
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parser_name="restructuredtext",
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writer_name="html",
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settings_overrides=stylesheets
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)
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def run_through_template(input, set_verbose):
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tmpfile = './tmp/output'
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try:
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with open(tmpfile, 'w') as out:
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args = [
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'python', 'build.py',
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"-i", "matrix_templates",
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"-o", "../scripts/tmp",
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"../scripts/"+input
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]
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if set_verbose:
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args.insert(2, "-v")
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log("EXEC: %s" % " ".join(args))
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log(" ==== build.py output ==== ")
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print subprocess.check_output(
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args,
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stderr=out,
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cwd="../templating"
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)
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except subprocess.CalledProcessError as e:
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print e.output
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with open(tmpfile, 'r') as f:
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sys.stderr.write(f.read() + "\n")
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raise
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"""
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Extract and resolve groups for the given target in the given targets listing.
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Args:
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targets_listing (str): The path to a YAML file containing a list of targets
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target_name (str): The name of the target to extract from the listings.
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Returns:
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dict: Containing "filees" (a list of file paths), "relative_title_styles"
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(a dict of relative style keyword to title character) and "title_styles"
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(a list of characters which represent the global title style to follow,
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with the top section title first, the second section second, and so on.)
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"""
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def get_build_target(targets_listing, target_name):
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build_target = {
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"title_styles": [],
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"relative_title_styles": {},
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"files": []
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}
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with open(targets_listing, "r") as targ_file:
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all_targets = yaml.load(targ_file.read())
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build_target["title_styles"] = all_targets["title_styles"]
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build_target["relative_title_styles"] = all_targets["relative_title_styles"]
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target = all_targets["targets"].get(target_name)
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if not target:
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raise Exception(
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"No target by the name '" + target_name + "' exists in '" +
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targets_listing + "'."
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)
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if not isinstance(target.get("files"), list):
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raise Exception(
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"Found target but 'files' key is not a list."
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)
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def get_group(group_id, depth):
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group_name = group_id[len("group:"):]
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group = all_targets.get("groups", {}).get(group_name)
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if not group:
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raise Exception(
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"Tried to find group '%s' but it doesn't exist." % group_name
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)
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if not isinstance(group, list):
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raise Exception(
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"Expected group '%s' to be a list but it isn't." % group_name
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)
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# deep copy so changes to depths don't contaminate multiple uses of this group
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group = copy.deepcopy(group)
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# swap relative depths for absolute ones
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for i, entry in enumerate(group):
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if isinstance(entry, dict):
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group[i] = {
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(rel_depth + depth): v for (rel_depth, v) in entry.items()
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}
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return group
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resolved_files = []
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for file_entry in target["files"]:
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# file_entry is a group id
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if isinstance(file_entry, basestring) and file_entry.startswith("group:"):
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group = get_group(file_entry, 0)
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# The group may be resolved to a list of file entries, in which case
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# we want to extend the array to insert each of them rather than
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# insert the entire list as a single element (which is what append does)
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if isinstance(group, list):
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resolved_files.extend(group)
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else:
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resolved_files.append(group)
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# file_entry is a dict which has more file entries as values
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elif isinstance(file_entry, dict):
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resolved_entry = {}
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for (depth, entry) in file_entry.iteritems():
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if not isinstance(entry, basestring):
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raise Exception(
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"Double-nested depths are not supported. Entry: %s" % (file_entry,)
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)
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if entry.startswith("group:"):
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resolved_entry[depth] = get_group(entry, depth)
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else:
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# map across without editing (e.g. normal file path)
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resolved_entry[depth] = entry
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resolved_files.append(resolved_entry)
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continue
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# file_entry is just a plain ol' file path
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else:
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resolved_files.append(file_entry)
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build_target["files"] = resolved_files
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return build_target
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def log(line):
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print "gendoc: %s" % line
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def logv(line):
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if VERBOSE:
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print "gendoc:V: %s" % line
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def prepare_env():
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try:
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os.makedirs("./gen")
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except OSError:
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pass
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try:
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os.makedirs("./tmp")
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except OSError:
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pass
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def cleanup_env():
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shutil.rmtree("./tmp")
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def main(target_name, keep_intermediates):
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prepare_env()
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log("Building spec [target=%s]" % target_name)
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target = get_build_target("../specification/targets.yaml", target_name)
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build_spec(target=target, out_filename="tmp/templated_spec.rst")
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run_through_template("tmp/templated_spec.rst", VERBOSE)
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fix_relative_titles(
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target=target, filename="tmp/templated_spec.rst",
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out_filename="tmp/full_spec.rst"
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)
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shutil.copy("../supporting-docs/howtos/client-server.rst", "tmp/howto.rst")
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run_through_template("tmp/howto.rst", False) # too spammy to mark -v on this
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rst2html("tmp/full_spec.rst", "gen/specification.html")
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rst2html("tmp/howto.rst", "gen/howtos.html")
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if not keep_intermediates:
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cleanup_env()
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if __name__ == '__main__':
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parser = ArgumentParser(
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"gendoc.py - Generate the Matrix specification as HTML to the gen/ folder."
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)
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parser.add_argument(
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"--nodelete", "-n", action="store_true",
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help="Do not delete intermediate files. They will be found in tmp/"
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)
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parser.add_argument(
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"--target", "-t", default="main",
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help="Specify the build target to build from specification/targets.yaml"
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)
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parser.add_argument(
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"--verbose", "-v", action="store_true",
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help="Turn on verbose mode."
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)
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args = parser.parse_args()
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if not args.target:
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parser.print_help()
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sys.exit(1)
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VERBOSE = args.verbose
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main(args.target, args.nodelete)
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