c3f92adf6b
Experiental support for generating multiple output formats from the same siphoned data. Adds a contrived example to generate a plain list of all CLI commands (the "itemlist" format). Eventually we can consider moving the tempate procesisng into the Output class as well as a way to override how the data is traversed (ordered). Change-Id: I77629a74a8fa0c7e583993469dc50491f72f13e7 Signed-off-by: Chris Luke <chrisy@flirble.org>
312 lines
9.6 KiB
Python
312 lines
9.6 KiB
Python
# Copyright (c) 2016 Comcast Cable Communications Management, LLC.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at:
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
# Generation template class
|
|
|
|
import logging, os,sys, cgi, json, jinja2, HTMLParser
|
|
|
|
# Classes register themselves in this dictionary
|
|
"""Mapping of known processors to their classes"""
|
|
siphons = {}
|
|
|
|
"""Mapping of known output formats to their classes"""
|
|
formats = {}
|
|
|
|
|
|
"""Generate rendered output for siphoned data."""
|
|
class Siphon(object):
|
|
|
|
# Set by subclasses
|
|
"""Our siphon name"""
|
|
name = None
|
|
|
|
# Set by subclasses
|
|
"""Name of an identifier used by this siphon"""
|
|
identifier = None
|
|
|
|
# Set by subclasses
|
|
"""The pyparsing object to use to parse with"""
|
|
_parser = None
|
|
|
|
"""The input data"""
|
|
_cmds = None
|
|
|
|
"""Group key to (directory,file) mapping"""
|
|
_group = None
|
|
|
|
"""Logging handler"""
|
|
log = None
|
|
|
|
"""Directory to look for siphon rendering templates"""
|
|
template_directory = None
|
|
|
|
"""Template environment, if we're using templates"""
|
|
_tplenv = None
|
|
|
|
def __init__(self, template_directory, format):
|
|
super(Siphon, self).__init__()
|
|
self.log = logging.getLogger("siphon.process.%s" % self.name)
|
|
|
|
# Get our output format details
|
|
fmt_klass = formats[format]
|
|
fmt = fmt_klass()
|
|
self._format = fmt
|
|
|
|
# Sort out the template search path
|
|
def _tpldir(name):
|
|
return os.sep.join((template_directory, fmt.name, name))
|
|
|
|
self.template_directory = template_directory
|
|
searchpath = [
|
|
_tpldir(self.name),
|
|
_tpldir("default"),
|
|
]
|
|
loader = jinja2.FileSystemLoader(searchpath=searchpath)
|
|
self._tplenv = jinja2.Environment(
|
|
loader=loader,
|
|
trim_blocks=True,
|
|
keep_trailing_newline=True)
|
|
|
|
# Convenience, get a reference to the internal escape and
|
|
# unescape methods in cgi and HTMLParser. These then become
|
|
# available to templates to use, if needed.
|
|
self._h = HTMLParser.HTMLParser()
|
|
self.escape = cgi.escape
|
|
self.unescape = self._h.unescape
|
|
|
|
|
|
# Output renderers
|
|
|
|
"""Returns an object to be used as the sorting key in the item index."""
|
|
def index_sort_key(self, group):
|
|
return group
|
|
|
|
"""Returns a string to use as the header at the top of the item index."""
|
|
def index_header(self):
|
|
return self.template("index_header")
|
|
|
|
"""Returns the string fragment to use for each section in the item
|
|
index."""
|
|
def index_section(self, group):
|
|
return self.template("index_section", group=group)
|
|
|
|
"""Returns the string fragment to use for each entry in the item index."""
|
|
def index_entry(self, meta, item):
|
|
return self.template("index_entry", meta=meta, item=item)
|
|
|
|
"""Returns an object, typically a string, to be used as the sorting key
|
|
for items within a section."""
|
|
def item_sort_key(self, item):
|
|
return item['name']
|
|
|
|
"""Returns a key for grouping items together."""
|
|
def group_key(self, directory, file, macro, name):
|
|
_global = self._cmds['_global']
|
|
|
|
if file in _global and 'group_label' in _global[file]:
|
|
self._group[file] = (directory, file)
|
|
return file
|
|
|
|
self._group[directory] = (directory, None)
|
|
return directory
|
|
|
|
"""Returns a key for identifying items within a grouping."""
|
|
def item_key(self, directory, file, macro, name):
|
|
return name
|
|
|
|
"""Returns a string to use as the header when rendering the item."""
|
|
def item_header(self, group):
|
|
return self.template("item_header", group=group)
|
|
|
|
"""Returns a string to use as the body when rendering the item."""
|
|
def item_format(self, meta, item):
|
|
return self.template("item_format", meta=meta, item=item)
|
|
|
|
"""Returns a string to use as the label for the page reference."""
|
|
def page_label(self, group):
|
|
return "_".join((
|
|
self.name,
|
|
self.sanitize_label(group)
|
|
))
|
|
|
|
"""Returns a title to use for a page."""
|
|
def page_title(self, group):
|
|
_global = self._cmds['_global']
|
|
(directory, file) = self._group[group]
|
|
|
|
if file and file in _global and 'group_label' in _global[file]:
|
|
return _global[file]['group_label']
|
|
|
|
if directory in _global and 'group_label' in _global[directory]:
|
|
return _global[directory]['group_label']
|
|
|
|
return directory
|
|
|
|
"""Returns a string to use as the label for the section reference."""
|
|
def item_label(self, group, item):
|
|
return "__".join((
|
|
self.name,
|
|
item
|
|
))
|
|
|
|
"""Label sanitizer; for creating Doxygen references"""
|
|
def sanitize_label(self, value):
|
|
return value.replace(" ", "_") \
|
|
.replace("/", "_") \
|
|
.replace(".", "_")
|
|
|
|
"""Template processor"""
|
|
def template(self, name, **kwargs):
|
|
tpl = self._tplenv.get_template(name + self._format.extension)
|
|
return tpl.render(
|
|
this=self,
|
|
**kwargs)
|
|
|
|
|
|
# Processing methods
|
|
|
|
"""Parse the input file into a more usable dictionary structure."""
|
|
def load_json(self, files):
|
|
self._cmds = {}
|
|
self._group = {}
|
|
|
|
line_num = 0
|
|
line_start = 0
|
|
for filename in files:
|
|
filename = os.path.relpath(filename)
|
|
self.log.info("Parsing items in file \"%s\"." % filename)
|
|
data = None
|
|
with open(filename, "r") as fd:
|
|
data = json.load(fd)
|
|
|
|
self._cmds['_global'] = data['global']
|
|
|
|
# iterate the items loaded and regroup it
|
|
for item in data["items"]:
|
|
try:
|
|
o = self._parser.parse(item['block'])
|
|
except:
|
|
self.log.error("Exception parsing item: %s\n%s" \
|
|
% (json.dumps(item, separators=(',', ': '),
|
|
indent=4),
|
|
item['block']))
|
|
raise
|
|
|
|
# Augment the item with metadata
|
|
o["meta"] = {}
|
|
for key in item:
|
|
if key == 'block':
|
|
continue
|
|
o['meta'][key] = item[key]
|
|
|
|
# Load some interesting fields
|
|
directory = item['directory']
|
|
file = item['file']
|
|
macro = o["macro"]
|
|
name = o["name"]
|
|
|
|
# Generate keys to group items by
|
|
group_key = self.group_key(directory, file, macro, name)
|
|
item_key = self.item_key(directory, file, macro, name)
|
|
|
|
if group_key not in self._cmds:
|
|
self._cmds[group_key] = {}
|
|
|
|
self._cmds[group_key][item_key] = o
|
|
|
|
"""Iterate over the input data, calling render methods to generate the
|
|
output."""
|
|
def process(self, out=None):
|
|
|
|
if out is None:
|
|
out = sys.stdout
|
|
|
|
# Accumulated body contents
|
|
contents = ""
|
|
|
|
# Write the header for this siphon type
|
|
out.write(self.index_header())
|
|
|
|
# Sort key helper for the index
|
|
def group_sort_key(group):
|
|
return self.index_sort_key(group)
|
|
|
|
# Iterate the dictionary and process it
|
|
for group in sorted(self._cmds.keys(), key=group_sort_key):
|
|
if group.startswith('_'):
|
|
continue
|
|
|
|
self.log.info("Processing items in group \"%s\" (%s)." % \
|
|
(group, group_sort_key(group)))
|
|
|
|
# Generate the section index entry (write it now)
|
|
out.write(self.index_section(group))
|
|
|
|
# Generate the item header (save for later)
|
|
contents += self.item_header(group)
|
|
|
|
def item_sort_key(key):
|
|
return self.item_sort_key(self._cmds[group][key])
|
|
|
|
for key in sorted(self._cmds[group].keys(), key=item_sort_key):
|
|
self.log.debug("--- Processing key \"%s\" (%s)." % \
|
|
(key, item_sort_key(key)))
|
|
|
|
o = self._cmds[group][key]
|
|
meta = {
|
|
"directory": o['meta']['directory'],
|
|
"file": o['meta']['file'],
|
|
"macro": o['macro'],
|
|
"name": o['name'],
|
|
"key": key,
|
|
"label": self.item_label(group, key),
|
|
}
|
|
|
|
# Generate the index entry for the item (write it now)
|
|
out.write(self.index_entry(meta, o))
|
|
|
|
# Generate the item itself (save for later)
|
|
contents += self.item_format(meta, o)
|
|
|
|
# Deliver the accumulated body output
|
|
out.write(contents)
|
|
|
|
|
|
"""Output format class"""
|
|
class Format(object):
|
|
|
|
"""Name of this output format"""
|
|
name = None
|
|
|
|
"""Expected file extension of templates that build this format"""
|
|
extension = None
|
|
|
|
|
|
"""Markdown output format"""
|
|
class FormatMarkdown(Format):
|
|
name = "markdown"
|
|
extension = ".md"
|
|
|
|
# Register 'markdown'
|
|
formats["markdown"] = FormatMarkdown
|
|
|
|
|
|
"""Itemlist output format"""
|
|
class FormatItemlist(Format):
|
|
name = "itemlist"
|
|
extension = ".itemlist"
|
|
|
|
# Register 'itemlist'
|
|
formats["itemlist"] = FormatItemlist
|