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#!/usr/bin/awk
# Hackish approach to get a machine-readable list of current matrix
# synapse REST API endpoints from the official documentation at
# https://github.com/matrix-org/synapse/raw/master/docs/workers.md
#
# invoke in shell with:
# URL=https://github.com/matrix-org/synapse/raw/master/docs/workers.md
# curl -L ${URL} | awk -f workers-doc-to-yaml.awk -
function worker_stanza_append(string) {
worker_stanza = worker_stanza string
}
function line_is_endpoint_url(line) {
# probably API endpoint if it starts with white-space and ^ or /
return (line ~ /^ +[\^/].*\//)
}
# Put YAML marker at beginning of file.
BEGIN {
print "---"
endpoint_conditional_comment = " # FIXME: ADDITIONAL CONDITIONS REQUIRED: to be enabled manually\n"
}
# Enable further processing after the introductory text.
# Read each synapse worker section as record and its lines as fields.
/Available worker applications/ {
enable_parsing = 1
# set record separator to markdown section header
RS = "\n### "
# set field separator to newline
FS = "\n"
}
# Once parsing is active, this will process each section as record.
enable_parsing {
# Each worker section starts with a synapse.app.X headline
if ($1 ~ /synapse\.app\./) {
# get rid of the backticks and extract worker type from headline
gsub("`", "", $1)
gsub("synapse.app.", "", $1)
worker_type = $1
# initialize empty worker stanza
worker_stanza = ""
# track if any endpoints are mentioned in a specific section
worker_has_urls = 0
# some endpoint descriptions contain flag terms
endpoints_seem_conditional = 0
# also, collect a list of available workers
workers = (workers ? workers "\n" : "") " - " worker_type
# loop through the lines (2 - number of fields in record)
for (i = 1; i < NF + 1; i++) {
# copy line for gsub replacements
line = $i
# end all lines but the last with a linefeed
linefeed = (i < NF - 1) ? "\n" : ""
# line starts with white-space and a hash: endpoint block headline
if (line ~ /^ +#/) {
# copy to output verbatim, normalizing white-space
gsub(/^ +/, "", line)
worker_stanza_append(" " line linefeed)
} else if (line_is_endpoint_url(line)) {
# mark section for special output formatting
worker_has_urls = 1
# remove leading white-space
gsub(/^ +/, "", line)
api_endpoint_regex = line
# FIXME: https://github.com/matrix-org/synapse/issues/new
# munge inconsistent media_repository endpoint notation
if (api_endpoint_regex == "/_matrix/media/") {
api_endpoint_regex = "^" line
}
# disable endpoints which specify complications
if (endpoints_seem_conditional) {
# only add notice if previous line didn't match
if (!line_is_endpoint_url($(i - 1))) {
worker_stanza_append(endpoint_conditional_comment)
}
worker_stanza_append(" # " api_endpoint_regex linefeed)
} else {
# output endpoint regex
worker_stanza_append(" - " api_endpoint_regex linefeed)
}
# white-space only line?
} else if (line ~ /^\w*$/) {
if (i > 3 && i < NF) {
# print white-space lines unless 1st or last line in section
worker_stanza_append(line linefeed)
}
# nothing of the above: the line is regular documentation text
} else {
# include this text line as comment
worker_stanza_append(" # " line linefeed)
# and take note of words hinting at additional conditions to be met
if (line ~ /\<[Ii]f\>|\<[Ff]or\>/) {
endpoints_seem_conditional = 1
}
}
}
if (worker_has_urls) {
print "\nmatrix_synapse_workers_" worker_type "_endpoints:"
print worker_stanza
} else {
# include workers without endpoints as well for reference
print "\n# " worker_type " worker (no API endpoints) ["
print worker_stanza
print "# ]"
}
}
}
END {
print "\nmatrix_synapse_workers_avail_list:"
print workers | "sort"
}
# vim: tabstop=4 shiftwidth=4 expandtab autoindent