From 46aa9f16d92b8c3ca3b03a36bf54f18721725963 Mon Sep 17 00:00:00 2001 From: David Robillard Date: Tue, 5 Oct 2010 23:57:15 +0000 Subject: Handle existing symlinks gracefully (but don't delete existing non-links to be safe). --- lv2includegen/lv2includegen.py | 30 +++++++++++++++++++++--------- 1 file changed, 21 insertions(+), 9 deletions(-) (limited to 'lv2includegen') diff --git a/lv2includegen/lv2includegen.py b/lv2includegen/lv2includegen.py index 80c0509..a27f1cd 100755 --- a/lv2includegen/lv2includegen.py +++ b/lv2includegen/lv2includegen.py @@ -12,6 +12,7 @@ __date__ = '2010-10-05' import errno import glob import os +import stat import sys import RDF @@ -46,9 +47,9 @@ def usage(): Example: %s /usr/local/include/lv2 """ % (script, script) - sys.exit(-1) def mkdir_p(path): + "Equivalent of UNIX mkdir -p" try: os.makedirs(path) except OSError as e: @@ -58,6 +59,8 @@ def mkdir_p(path): raise def lv2includegen(bundles): + """Build a directory tree of symlinks to LV2 extension bundles + for including header files using URI-like paths.""" for bundle in bundles: # Load manifest into model manifest = RDF.Model() @@ -67,20 +70,29 @@ def lv2includegen(bundles): # Query extension URI results = manifest.find_statements(RDF.Statement(None, rdf.type, lv2.Specification)) for r in results: - ext_uri = str(r.subject.uri) - ext_path = os.path.normpath(ext_uri[ext_uri.find(':') + 1:].lstrip('/')) - ext_parent_dir = os.path.join(outdir, os.path.dirname(ext_path)) - ext_dir = os.path.basename(ext_path) + ext_uri = str(r.subject.uri) + ext_path = os.path.normpath(ext_uri[ext_uri.find(':') + 1:].lstrip('/')) + ext_dir = os.path.join(outdir, ext_path) - # Make symlink to bundle directory - mkdir_p(ext_parent_dir) - os.symlink(bundle, os.path.join(ext_parent_dir, ext_dir)) + # Make parent directories + mkdir_p(os.path.dirname(ext_dir)) + + # Remove existing symlink if necessary + if os.access(ext_dir, os.F_OK): + mode = os.lstat(ext_dir)[stat.ST_MODE] + if stat.S_ISLNK(mode): + os.remove(ext_dir) + else: + raise Exception(ext_dir + " exists and is not a link") + # Make symlink to bundle directory + os.symlink(bundle, ext_dir) + if __name__ == "__main__": args = sys.argv[1:] if len(args) != 1: usage() - exit(1) + sys.exit(1) outdir = args[0] print "Building LV2 include tree at", outdir -- cgit v1.2.1