From 24a60718eb64da9f5b9e284965e888dd4371a278 Mon Sep 17 00:00:00 2001
From: Michael Schwarz <michi.schwarz@gmail.com>
Date: Mon, 14 Sep 2015 15:04:45 +0200
Subject: Implemented Asymptote dependency tracking.

---
 support/asymptote/__main__.py | 62 +++++++++++++++++++++++++++++++------------
 1 file changed, 45 insertions(+), 17 deletions(-)

(limited to 'support')

diff --git a/support/asymptote/__main__.py b/support/asymptote/__main__.py
index 238332f..9d712ef 100644
--- a/support/asymptote/__main__.py
+++ b/support/asymptote/__main__.py
@@ -1,26 +1,54 @@
-import os, shutil
-from lib import util
+import sys, os, shutil
+from lib import util, make
 
 
 def _asymptote(in_path, out_path, asymptote_dir, working_dir):
-	util.command([os.environ['ASYMPTOTE'], '-f', 'pdf', '-o', out_path, in_path], set_env = { 'ASYMPTOTE_DIR': asymptote_dir }, working_dir = working_dir)
+	args = [os.environ['ASYMPTOTE'], '-vv', '-f', 'pdf', '-o', out_path, in_path]
+	
+	with util.command_context(args, set_env = { 'ASYMPTOTE_DIR': asymptote_dir }, working_dir = working_dir, use_stderr = True) as process:
+		def get_loaded_file(line):
+			if any(line.startswith(j) for j in ['Loading ', 'Including ']):
+				parts = line.rstrip('\n').split(' ')
+				
+				if len(parts) == 4:
+					_, _, from_, path = parts
+					
+					if from_ == 'from':
+						return path
+			
+			return None
+		
+		def iter_loaded_files():
+			for i in process.stderr:
+				loaded_file = get_loaded_file(i)
+				
+				if loaded_file is not None:
+					yield loaded_file
+				elif not any(i.startswith(j) for j in ['cd ', 'Using configuration ']):
+					print >> sys.stderr, i,
+		
+		loaded_files = list(iter_loaded_files())
+	
+	return loaded_files
 
 
 @util.main
 def main(in_path, out_path):
 	_, out_suffix = os.path.splitext(out_path)
 	
-	if out_suffix == '.pdf':
-		with util.TemporaryDirectory() as temp_dir:
-			absolute_in_path = os.path.abspath(in_path)
-			temp_out_path = os.path.join(temp_dir, 'out.pdf')
-			
-			# Asymptote creates A LOT of temp files (presumably when invoking LaTeX) and leaves some of them behind. Thus we run asymptote in a temporary directory.
-			_asymptote(absolute_in_path, 'out', os.path.dirname(absolute_in_path), temp_dir)
-			
-			if not os.path.exists(temp_out_path):
-				raise util.UserError('Asymptote did not generate a PDF file for input file {}.', in_path)
-			
-			shutil.copyfile(temp_out_path, out_path)
-	else:
-		raise Exception('Unknown file type: {}'.format(out_suffix))
+	with util.TemporaryDirectory() as temp_dir:
+		absolute_in_path = os.path.abspath(in_path)
+		temp_out_path = os.path.join(temp_dir, 'out.pdf')
+		
+		# Asymptote creates A LOT of temp files (presumably when invoking LaTeX) and leaves some of them behind. Thus we run asymptote in a temporary directory.
+		loaded_files = _asymptote(absolute_in_path, 'out', os.path.dirname(absolute_in_path), temp_dir)
+		
+		if not os.path.exists(temp_out_path):
+			raise util.UserError('Asymptote did not generate a PDF file for input file {}.', in_path)
+		
+		# All dependencies as paths relative to the project root.
+		dependencies = set(map(os.path.relpath, loaded_files))
+		
+		# Write output files.
+		make.write_dependencies(out_path + '.d', out_path, dependencies - { in_path })
+		shutil.copyfile(temp_out_path, out_path)
-- 
cgit