The rest of the script?

Because two commits are sufficient :-)

markdownrunner.py

@@ -10,14 +10,25 @@ import sys
 # - Let the user decide, what to run / edit / split / skip
 # - Run the commands remotely
 
-# Usage: $0 remote.host.name md1 md2 ...
-# TODO: implement it
+# Usage: $0 remote.host.name md1 ...
 
+host: str
+
+def main():
+	if len(sys.argv) < 3:
+		print(f"Usage: {sys.argv[0]} hostname file1.md ...")
+		exit(1)
+	# Here I would use Haskell's pointfree functions, so that host is implicitly passed...
+	# Never mind, it will be a global variable NOTE THIS!!!
+	global host
+	host = sys.argv[1]
+	for file in sys.argv[2:]:
+		process_file(file)
 
 @dataclass
 class Command:
 	user: str
-	directory: str
+	directory: Any[str, None]
 	command: str
 	context: str
 
@@ -40,54 +51,136 @@ def extract_snippets(pd: t.Pandoc) -> Sequence[Tuple[str, str]]:
 		last_block = stringify(block)
 	return result
 
-def parse_snippet(s: Tuple[str, str]) -> Sequence[Sequence[Command]]:
-	# We need to preserve the groups of commands, so we return a list of groups (lists) of commands.
+def parse_snippet(s: Tuple[str, str]) -> Sequence[Command]:
 	# Will return always a list, even if it has only one element.
 	# This is where we handle blank lines, comments, cd's and sudo's, so that the Commands in the output are "runnable"
-	context_prefix = s[1]
-	# TODO
 
-def user_action(hunk: Sequence[Command]) -> Sequence[Command]:
+	# The original context should be mentioned for all hunks
+	context = s[0]
+	
+	
+	# We now check the separate lines and possibly tweak them (e.g. by removing sudo-s)
+	lines = s[1].split('\n')
+	directory = None	# Don't cd by default
+	user = 'root'	# Connect as root by default (it does not really matter, since the commands are run with sudo's)
+	result = []
+	for line in lines:
+		line = line.strip()
+		if line.startswith('cd'):
+			parts = line.split()
+			assert len(parts) == 2
+			directory = parts[1]
+			continue
+		elif line.startswith('sudo -u'):
+			parts = line.split(maxsplit=5)
+			assert parts[3] == '-H', "Insecure sudo?"
+			user = parts[2]
+			directory = f'~{user}'	# This actually works with SSH. That is nice, since we don't need to know the mapping of 
+			cmd = parts[4]
+		elif line.startswith('sudo'):
+			parts = line.split(maxsplit=2)
+			assert not parts[1].startswith('-'), "Weird sudo"
+			user = 'root'
+			cmd = parts[1]
+		elif line == '':
+			# Only add it to context for reference
+			context = f'{context}\n'
+			continue
+		else:
+			# No sudo or cd, just a command.
+			user = 'root'	# Reset to default
+			cmd = line
+		result.append(Command(user=user,directory=directory,command=cmd,context=context))
+		# Let's have the previously processed commands in the context
+		context = f"{context}\nCMD: {user}:{directory if directory else '??'} $ {cmd}"
+	return result	# I miss the right feature of Nim lang...
+
+
+
+def user_action(hunk: Sequence[Command], context=None) -> Sequence[Command]:
 	# Maybe modify the commands to run.
 	# This should have a simple UI: show the hunk with context (ideally in grey), ask what to do, return the wanted command
 	# Actions: yes(y): accept input; no(n): skip this command; edit(e): launch $EDITOR or vim on the hunk; quit(q): terminate; split(s): split hunks to individual lines and ask for each one.
-	# TODO
-	pass
+	
+	# FIXME: We don't implement splitting yet, because it's simple to comment / delete in the editor
+	# FIXME: We only show given context and don't care for the command's one; that's wrong.
+	
+	def stringify_hunk(hunk):
+		result = ''
+		for cmd in hunk:
+			global host
+			result += f'SSH: {cmd.user}@{host} {cmd.directory} $ {cmd.command}\n'
+
+
+	# TODO: Print context in color (gray?)
+	print('-------------------------------------------')
+	print(context)
+	print()
+	print(stringify_hunk(hunk))
+
+	# TODO: Print prompt in color (green?)
+	answer = input("What to do: edit(e), run(y), skip(n)?")
+	if answer.startswith(('e', 'E')):
+		import tempfile
+		with tempfile.NamedTemporaryFile() as tmpfile:
+			# Fill the file with data
+			for cmd in hunk:
+				tmpfile.file.write(f"{cmd.user}\t{cmd.directory}\t{cmd.command}\n")
+			tmpfile.file.flush()	# Should not be needed, but better safe than sorry
+			# Let the user edit the file
+			import os
+			editor = os.getenv('EDITOR')
+			if editor is None:
+				# Fallback to vim
+				editor = 'vim'
+			import subprocess
+			subprocess.run([editor, tmpfile.name])
+			# Read the file back
+			new_hunk = []
+			for line in tmpfile.file.readlines():
+				parts = line.split('\t', maxsplit=3)
+				new_hunk.append(Command(user=parts[0],directory=parts[1],command=parts[2],context=None)
+		# Python has no goto for restarting, but we can recurse
+		return user_action(new_hunk, context)
+	elif answer.startswith(('y', 'Y')):
+		return hunk
+	elif answer.startswith(('n', 'N')):
+		return []
+
+
 
 def run_command(cmd: Command):
 	# Generate and run the SSH command.
+	global host
+	local_command = ['ssh', host]
+	if cmd.user is not None:
+		local_command.extend(['-l', cmd.user])
+	if cmd.directory is not None:
+		cmd.command += f'cd {cmd.directory}; {cmd.command}'
+	local_command.append(cmd.command)
+	
+	# Run
+	import subprocess
+	process = subprocess.run(local_command)
+	if process.returncode != 0:
+		# TODO: Print in color (red?)
+		answer = input(f"Command {process.args} failed with return code {process.returncode}. Continue? ")
+		if not answer.startswith(('Y', 'y', 'a', 'A')):	# We are Czech, so "ano" is a valid answer :-)
+			print("Bailing out")
+			sys.exit(1)
 
 
 def process_file(fn: str):
 	"""
 	To be called upon each file on the command line. This function should perform all the steps needed in order to remotely run a parsed markdown, id est the three parts above.
 	"""
-	# TODO
-	pass
-
-
-# FIXME: tohle má být parametr
-TARGET="nothing.nowhere.invalid"
-
-def format_command(command, user=None, directory=None, target=None): -> str
-	cmd = "ssh "
-	
-	if user is not None:
-		cmd += f"{user}@"
-
-	if target is None:
-		global TARGET
-		cmd += TARGET
-	else:
-		cmd += target
-	
-	# Be safe:
-	cmd += " set -e ';' "
-
-	if directory is not None
-		cmd += f"cd '{directory}' ';' "
-	
-	cmd += command
-	return cmd
-
-
+	pd = pandoc.read(open(fn))
+	snippets = extract_snippets(pd)
+	for snip in snippets:
+		cmds = parse_snippet(snip)
+		cmds = user_action(cmds)
+		for cmd in cmds:
+			run_command(cmd)
+
+if __name__ == '__main__':
+	main()