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#!/usr/bin/env python3
#
# markdown-preprocess - filter *.md.in files, convert to .md
#
import glob
import os
import re
import sys
def main():
script_dir = os.path.abspath(os.path.dirname(__file__))
man_dir = os.path.join(script_dir,"../docs/source/markdown")
try:
os.chdir(man_dir)
except FileNotFoundError:
raise Exception("Please invoke me from the base repo dir")
# If called with args, process only those files
infiles = [ os.path.basename(x) for x in sys.argv[1:] ]
if len(infiles) == 0:
# Called without args: process all *.md.in files
infiles = glob.glob('*.md.in')
for infile in infiles:
process(infile)
def process(infile):
# Some options are the same between containers and pods; determine
# which description to use from the name of the source man page.
pod_or_container = 'container'
if '-pod-' in infile or '-kube-' in infile:
pod_or_container = 'pod'
# Sometimes a man page includes the subcommand.
subcommand = podman_subcommand(infile)
# foo.md.in -> foo.md -- but always write to a tmpfile
outfile = os.path.splitext(infile)[0]
outfile_tmp = outfile + '.tmp.' + str(os.getpid())
# print("got here: ",infile, " -> ", outfile)
with open(infile, 'r') as fh_in, open(outfile_tmp, 'w') as fh_out:
for line in fh_in:
# '@@option foo' -> include file options/foo.md
if line.startswith('@@option '):
_, optionname = line.strip().split(" ")
optionfile = os.path.join("options", optionname + '.md')
# Comment intended to help someone viewing the .md file.
# Leading newline is important because if two lines are
# consecutive without a break, sphinx (but not go-md2man)
# treats them as one line and will unwantedly render the
# comment in its output.
fh_out.write("\n[//]: # (BEGIN included file " + optionfile + ")\n")
with open(optionfile, 'r') as fh_optfile:
for opt_line in fh_optfile:
opt_line = replace_type(opt_line, pod_or_container)
opt_line = opt_line.replace('<<subcommand>>', subcommand)
fh_out.write(opt_line)
fh_out.write("\n[//]: # (END included file " + optionfile + ")\n")
else:
fh_out.write(line)
os.chmod(outfile_tmp, 0o444)
os.rename(outfile_tmp, outfile)
# Given a file path of the form podman-foo-bar.1.md.in, return "foo bar"
def podman_subcommand(string: str) -> str:
if string.startswith("podman-"):
string = string[len("podman-"):]
if string.endswith(".1.md.in"):
string = string[:-len(".1.md.in")]
return string.replace("-", " ")
# Replace instances of '<<pod|container>>' with the desired one (based on
# 'type' which is 'pod' or 'container').
def replace_type(line: str, type: str) -> str:
# Internal helper function: determines the desired half of the <a|b> string
def replwith(matchobj):
lhs, rhs = matchobj[0].split('|')
# Strip off '<<' and '>>'
lhs = lhs[2:]
rhs = rhs[:len(rhs)-2]
# Check both sides for 'pod' followed by (non-"m" or end-of-string).
# The non-m prevents us from triggering on 'podman', which could
# conceivably be present in both sides. And we check for 'pod',
# not 'container', because it's possible to have something like
# <<container in pod|container>>.
if re.match('pod([^m]|$)', lhs, re.IGNORECASE):
if re.match('pod([^m]|$)', rhs, re.IGNORECASE):
raise Exception("'%s' matches 'pod' in both left and right sides" % matchobj[0])
# Only left-hand side has "pod"
if type == 'pod':
return lhs
else:
return rhs
else:
if not re.match('pod([^m]|$)', rhs, re.IGNORECASE):
raise Exception("'%s' does not match 'pod' in either side" % matchobj[0])
if type == 'pod':
return rhs
else:
return lhs
return re.sub('<<[^\|>]+\|[^\|>]+>>', replwith, line)
if __name__ == "__main__":
main()
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