epoll-wait for resuming from lua handoff

Makefile

@@ -5,6 +5,8 @@ PROJECT_DIR?=C:\\hammer\ttt_terrorcon
 PYTHON_BIN?=./env/scripts/python
 SHLEX_BIN?=./contrib/shlex
 SHLEX_FLAGS?=
+EPOLL_THEN_BIN?=$(PYTHON_BIN) ./contrib/epoll-then
+EPOLL_THEN_FLAGS?=
 
 #SHELL=C:\\Program\ Files\\Git\\bin\\bash.exe
 #.SHELLFLAGS=-c
@@ -176,8 +178,10 @@ maps/%.bsp: %.bsp
 	ln -f lua/nav_generate.lua "$(MOD_DIR)/lua/autorun/runme.lua"
 	$(SHLEX_BIN) $(SHLEX_FLAGS) $(SHLEX_HL2LOG_FLAGS) \
 		"'$(GAME_DIR)$(GAME)'" -allowdebug $(VBIN_FLAGS) $(GAME_FLAGS) $(GAME_TTT_FLAGS) \
-		+sv_cheats 1 +nav_edit 1 +map navgen
-	# todo: check  "$(MOD_DIR)/data/runme.txt" for content "ng_f", to trigger kill hl2.exe
+		+sv_cheats 1 +nav_edit 1 +map navgen || true
+	$(SHLEX_BIN) $(SHLEX_FLAGS) $(EPOLL_THEN_BIN) $(EPOLL_THEN_FLAGS) --literal ng_2  --file "'$(MOD_DIR)/data/runme.txt'" -- \
+		echo TIME TO DO THINGS &
+		# todo: check  "$(MOD_DIR)/data/runme.txt" for content "ng_f", to trigger kill hl2.exe
 	cp -v "$(MOD_DIR)/maps/navgen.nav" $@
 	rm -v \
 		"$(MOD_DIR)/lua/autorun/runme.lua" \

contrib/epoll-then

+#!/usr/bin/env python3
+"""
+    epool-then - poll a file for a specific document, on match run a command
+"""
+import subprocess
+import logging
+import os
+import sys
+import argparse
+import time
+
+LOGGER = logging.getLogger(os.path.basename(__file__))
+
+ARGP = argparse.ArgumentParser()
+ARGP.add_argument('remainder', nargs=argparse.REMAINDER)
+ARGP.add_argument('--file', required=True)
+ARGP.add_argument('--literal', required=True)
+ARGP.add_argument('--poll-sec', type=float, default=2)
+
+def main(argp=None, argv=None):
+    if argp is None:
+        argp = ARGP.parse_args(argv)
+    if argp.remainder and argp.remainder[0] == '--':
+        argp.remainder = argp.remainder[1:]
+
+    logging.basicConfig(
+        level=logging.INFO,
+    )
+
+    while True:
+        with open(argp.file) as fh:
+            dat = fh.read()
+        match = dat == argp.literal
+        LOGGER.info('status: match=%s %s=%r', (match, argp.literal), argp.file, dat)
+        if match:
+            break
+
+        time.sleep(argp.poll_sec)
+
+    if argp.remainder:
+        execve = argp.remainder
+        LOGGER.info('execve=%r', execve)
+        return subprocess.run(execve).returncode
+    return 0
+
+if __name__ == '__main__':
+    exit(main())

contrib/shlex

@@ -9,6 +9,7 @@ import os
 import sys
 import argparse
 import shutil
+import re
 
 LOGGER = logging.getLogger(os.path.basename(__file__))
 
@@ -19,6 +20,8 @@ ARGP.add_argument('--tail-bin')
 ARGP.add_argument('--tail', help="follow a file while supervising a subprocess")
 ARGP.add_argument('remainder', nargs=argparse.REMAINDER)
 
+RE_GITBASH_STYLE = re.compile('^/(\w)/')
+
 def main(argp=None, argv=None):
     if argp is None:
         argp = ARGP.parse_args(argv)
@@ -26,12 +29,19 @@ def main(argp=None, argv=None):
         level=(logging.INFO if argp.verbose else logging.WARNING),
     )
 
+    if argp.remainder and argp.remainder[0] == '--':
+        argp.remainder = argp.remainder[1:]
+
     LOGGER.info('execve_orig: %r', argp.remainder)
     execve = shlex.split(' '.join(argp.remainder))  #  + ['&', 'exit']  windows hack to get returncode?
     LOGGER.info('execve_shlex: %r', execve)
+    execve_sub = [
+        [orig, os.path.normpath(RE_GITBASH_STYLE.subn('\\1:\\\\', orig, count=1)[0])]
+        for orig in execve
+    ]
     execve = [
-        (os.path.normpath(i) if os.path.isfile(i) else i)
-        for i in execve
+        (i[1] if os.path.isfile(i[1]) else i[0])
+        for i in execve_sub
     ]
     LOGGER.info('execve_shlex_normpath: %r', execve)
 
@@ -54,7 +64,12 @@ def main(argp=None, argv=None):
         if 'CPROGRAMFILES' in argp.tail_bin:
             argp.tail_bin = argp.tail_bin.replace('CPROGRAMFILES', 'C:\\program files')
         tail_popen = subprocess.Popen([argp.tail_bin, '-fn0', argp.tail], stdout=sys.stderr.buffer)
-    cproc = subprocess.run(execve, shell=argp.subprocess_shell)
+    cproc = None
+    try:
+        cproc = subprocess.run(execve, shell=argp.subprocess_shell)
+    except OSError as err:
+        LOGGER.error('%s:%s\nprogram: %r', err.__class__.__name__, err, execve[0])
+        return 2
     if tail_popen:
         tail_popen.kill()
     LOGGER.info('execve_rc: %r', cproc.returncode)