[gobject-introspection] giscanner: Make sure we use real paths in more places

[Carlos Garcia Campos <carlosgc src gnome org>]

commit 95cbe0c58f729fbcd27e68a693a8bbcaaf117858
Author: Carlos Garcia Campos <cgarcia igalia com>
Date:   Wed Nov 13 12:31:19 2013 +0100

    giscanner: Make sure we use real paths in more places
    
    Ensure we are using the real path also for cflags comming from
    pkg_config files and command line options. This fixes the generation of
    the gir files when include paths contain symlinks.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=712211

 giscanner/dumper.py        |    2 +-
 giscanner/scannermain.py   |   14 ++++++++++----
 giscanner/sourcescanner.py |    4 ++--
 giscanner/utils.py         |    7 +++++++
 4 files changed, 20 insertions(+), 7 deletions(-)
---
diff --git a/giscanner/dumper.py b/giscanner/dumper.py
index 98920e3..93f2756 100644
--- a/giscanner/dumper.py
+++ b/giscanner/dumper.py
@@ -214,7 +214,7 @@ class DumpCompiler(object):
         else:
             args.append("-Wno-deprecated-declarations")
         pkgconfig_flags = self._run_pkgconfig('--cflags')
-        args.extend(pkgconfig_flags)
+        args.extend([utils.cflag_real_include_path(f) for f in pkgconfig_flags])
         cflags = os.environ.get('CFLAGS', '')
         for cflag in cflags.split():
             args.append(cflag)
diff --git a/giscanner/scannermain.py b/giscanner/scannermain.py
index 6ae2ded..bc7bc16 100755
--- a/giscanner/scannermain.py
+++ b/giscanner/scannermain.py
@@ -46,13 +46,19 @@ from . import utils
 def process_cflags_begin(option, opt, value, parser):
     cflags = getattr(parser.values, option.dest)
     while len(parser.rargs) > 0 and parser.rargs[0] != '--cflags-end':
-        cflags.append(parser.rargs.pop(0))
+        arg = parser.rargs.pop(0)
+        cflags.append(utils.cflag_real_include_path(arg))
 
 
 def process_cflags_end(option, opt, value, parser):
     pass
 
 
+def process_cpp_includes(option, opt, value, parser):
+    cpp_includes = getattr(parser.values, option.dest)
+    cpp_includes.append(os.path.realpath(value))
+
+
 def get_preprocessor_option_group(parser):
     group = optparse.OptionGroup(parser, "Preprocessor options")
     group.add_option("", "--cflags-begin",
@@ -63,8 +69,8 @@ def get_preprocessor_option_group(parser):
                      help="End preprocessor/compiler flags",
                      action="callback", callback=process_cflags_end)
     group.add_option("-I", help="Pre-processor include file",
-                     action="append", dest="cpp_includes",
-                     default=[])
+                     dest="cpp_includes", default=[], type="string",
+                     action="callback", callback=process_cpp_includes)
     group.add_option("-D", help="Pre-processor define",
                      action="append", dest="cpp_defines",
                      default=[])
@@ -252,7 +258,7 @@ def process_packages(options, packages):
     filtered_output = list(process_options(output, options_whitelist))
     parser = _get_option_parser()
     pkg_options, unused = parser.parse_args(filtered_output)
-    options.cpp_includes.extend(pkg_options.cpp_includes)
+    options.cpp_includes.extend([os.path.realpath(f) for f in pkg_options.cpp_includes])
     options.cpp_defines.extend(pkg_options.cpp_defines)
     options.cpp_undefines.extend(pkg_options.cpp_undefines)
 
diff --git a/giscanner/sourcescanner.py b/giscanner/sourcescanner.py
index 3444445..42af96f 100644
--- a/giscanner/sourcescanner.py
+++ b/giscanner/sourcescanner.py
@@ -227,7 +227,7 @@ class SourceScanner(object):
 
     def set_cpp_options(self, includes, defines, undefines, cflags=[]):
         self._cpp_options.extend(cflags)
-        for prefix, args in [('-I', includes),
+        for prefix, args in [('-I', [os.path.realpath(f) for f in includes]),
                              ('-D', defines),
                              ('-U', undefines)]:
             for arg in (args or []):
@@ -243,7 +243,7 @@ class SourceScanner(object):
             self._filenames.append(filename)
 
         headers = []
-        for filename in filenames:
+        for filename in self._filenames:
             if os.path.splitext(filename)[1] in SOURCE_EXTS:
                 self._scanner.lex_filename(filename)
             else:
diff --git a/giscanner/utils.py b/giscanner/utils.py
index 77d05b9..def53fe 100644
--- a/giscanner/utils.py
+++ b/giscanner/utils.py
@@ -148,3 +148,10 @@ def files_are_identical(path1, path2):
     f1.close()
     f2.close()
     return buf1 == buf2
+
+
+def cflag_real_include_path(cflag):
+    if not cflag.startswith("-I"):
+        return cflag
+
+    return "-I" + os.path.realpath(cflag[2:])