From cd1952bedc089e501c634e8fc1bdc152354b2bb0 Mon Sep 17 00:00:00 2001
From: Pavel 'LEdoian' Turinsky <ledoian@matfyz.cz>
Date: Wed, 29 Apr 2020 15:21:57 +0200
Subject: [PATCH] A skeleton of the script

---
 .gitignore        |  4 ++
 markdownrunner.py | 93 +++++++++++++++++++++++++++++++++++++++++++++++
 requirements.txt  |  1 +
 3 files changed, 98 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 markdownrunner.py
 create mode 100644 requirements.txt

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b8736fb
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+.*
+!.gitignore
+
+venv
diff --git a/markdownrunner.py b/markdownrunner.py
new file mode 100644
index 0000000..77a019f
--- /dev/null
+++ b/markdownrunner.py
@@ -0,0 +1,93 @@
+#!/bin/python3
+
+import pandoc
+import pandoc.types as t
+import sys
+
+# There are three parts:
+# - Parse a given markdown and extract the commands
+#    - Also: keep track of the groups / ...
+# - Let the user decide, what to run / edit / split / skip
+# - Run the commands remotely
+
+# Usage: $0 remote.host.name md1 md2 ...
+# TODO: implement it
+
+
+@dataclass
+class Command:
+	user: str
+	directory: str
+	command: str
+	context: str
+
+def stringify(block) -> str:
+	"""
+	Take an object of some of pandoc.types and make the best of it.
+	"""
+	# The pandoc library has a fancy function for that...
+	return pandoc.write(block)
+
+def extract_snippets(pd: t.Pandoc) -> Sequence[Tuple[str, str]]:
+	"""
+	This extracts snippets from the code. The problem is, that we want context with it, so we return a list of tuples (previous_block_stringified, code_snippet).
+	"""
+	result = []
+	last_block = ""
+	for block in pd[1]:
+		if isinstance(block, t.CodeBlock):
+			result.append((last_block, block[1]))
+		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.
+	# 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]:
+	# 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
+
+def run_command(cmd: Command):
+	# Generate and run the SSH command.
+
+
+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
+
+
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..73fe53a
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1 @@
+git+https://github.com/boisgera/pandoc.git