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matrix-spec-proposals/scripts/gendoc.py

417 lines
15 KiB
Python

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