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							102 lines
						
					
					
						
							3.0 KiB
						
					
					
				
			
		
		
	
	
							102 lines
						
					
					
						
							3.0 KiB
						
					
					
				#!/usr/bin/env python3 | 
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 | 
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# Copyright (c) 2011 Google Inc. All rights reserved. | 
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# Use of this source code is governed by a BSD-style license that can be | 
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# found in the LICENSE file. | 
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 | 
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"""Using the JSON dumped by the dump-dependency-json generator, | 
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generate input suitable for graphviz to render a dependency graph of | 
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targets.""" | 
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 | 
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import collections | 
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import json | 
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import sys | 
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 | 
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 | 
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def ParseTarget(target): | 
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    target, _, suffix = target.partition("#") | 
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    filename, _, target = target.partition(":") | 
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    return filename, target, suffix | 
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 | 
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 | 
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def LoadEdges(filename, targets): | 
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    """Load the edges map from the dump file, and filter it to only | 
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  show targets in |targets| and their depedendents.""" | 
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 | 
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    file = open("dump.json") | 
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    edges = json.load(file) | 
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    file.close() | 
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 | 
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    # Copy out only the edges we're interested in from the full edge list. | 
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    target_edges = {} | 
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    to_visit = targets[:] | 
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    while to_visit: | 
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        src = to_visit.pop() | 
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        if src in target_edges: | 
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            continue | 
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        target_edges[src] = edges[src] | 
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        to_visit.extend(edges[src]) | 
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 | 
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    return target_edges | 
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 | 
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 | 
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def WriteGraph(edges): | 
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    """Print a graphviz graph to stdout. | 
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  |edges| is a map of target to a list of other targets it depends on.""" | 
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 | 
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    # Bucket targets by file. | 
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    files = collections.defaultdict(list) | 
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    for src, dst in edges.items(): | 
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        build_file, target_name, toolset = ParseTarget(src) | 
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        files[build_file].append(src) | 
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 | 
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    print("digraph D {") | 
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    print("  fontsize=8")  # Used by subgraphs. | 
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    print("  node [fontsize=8]") | 
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 | 
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    # Output nodes by file.  We must first write out each node within | 
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    # its file grouping before writing out any edges that may refer | 
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    # to those nodes. | 
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    for filename, targets in files.items(): | 
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        if len(targets) == 1: | 
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            # If there's only one node for this file, simplify | 
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            # the display by making it a box without an internal node. | 
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            target = targets[0] | 
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            build_file, target_name, toolset = ParseTarget(target) | 
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            print( | 
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                f'  "{target}" [shape=box, label="{filename}\\n{target_name}"]' | 
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            ) | 
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        else: | 
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            # Group multiple nodes together in a subgraph. | 
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            print('  subgraph "cluster_%s" {' % filename) | 
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            print('    label = "%s"' % filename) | 
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            for target in targets: | 
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                build_file, target_name, toolset = ParseTarget(target) | 
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                print(f'    "{target}" [label="{target_name}"]') | 
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            print("  }") | 
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 | 
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    # Now that we've placed all the nodes within subgraphs, output all | 
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    # the edges between nodes. | 
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    for src, dsts in edges.items(): | 
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        for dst in dsts: | 
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            print(f'  "{src}" -> "{dst}"') | 
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 | 
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    print("}") | 
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 | 
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 | 
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def main(): | 
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    if len(sys.argv) < 2: | 
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        print(__doc__, file=sys.stderr) | 
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        print(file=sys.stderr) | 
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        print("usage: %s target1 target2..." % (sys.argv[0]), file=sys.stderr) | 
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        return 1 | 
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 | 
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    edges = LoadEdges("dump.json", sys.argv[1:]) | 
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 | 
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    WriteGraph(edges) | 
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    return 0 | 
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 | 
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 | 
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if __name__ == "__main__": | 
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    sys.exit(main())
 | 
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 |