[Webkit-unassigned] [Bug 153712] New: generate-inspector-gresource-manifest.py uses the wrong python interpreter

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=153712

            Bug ID: 153712
           Summary: generate-inspector-gresource-manifest.py uses the
                    wrong python interpreter
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jeremyhu at apple.com
                CC: bugs-noreply at webkitgtk.org

Originally reported at https://trac.macports.org/ticket/50472

configure finds an appropriate version of python:

:info:configure -- Found PythonInterp: /opt/local/bin/python2.7 (found suitable version "2.7.11", minimum required is "2.7.0") 

but the build still fails when executing the generate-inspector-gresource-manifest.py script when the first python executable in $PATH is version 2.6:

:info:build [ 86%] Generating ../../DerivedSources/webkit2gtk/InspectorGResourceBundle.xml
:info:build cd /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_webkit2-gtk/webkit2-gtk/work/build/Source/WebKit2 && /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_webkit2-gtk/webkit2-gtk/work/webkitgtk-2.11.4/Tools/gtk/generate-inspector-gresource-manifest.py --output=/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_webkit2-gtk/webkit2-gtk/work/build/DerivedSources/webkit2gtk/InspectorGResourceBundle.xml 
...
:info:build Traceback (most recent call last):
:info:build   File "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_webkit2-gtk/webkit2-gtk/work/webkitgtk-2.11.4/Tools/gtk/generate-inspector-gresource-manifest.py", line 18, in <module>
:info:build     import argparse
:info:build ImportError: No module named argparse
:info:build make[2]: *** [DerivedSources/webkit2gtk/InspectorGResourceBundle.xml] Error 1

The issue is that the script is executed directly with a hash-bang of "#!/usr/bin/env python" whereas other python scripts are executed using the configured interpreter, eg:

:info:build cd /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_webkit2-gtk/webkit2-gtk/work/webkitgtk-2.11.4/Source/WebKit2 && /opt/local/bin/python2.7 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_webkit2-gtk/webkit2-gtk/work/webkitgtk-2.11.4/Source/WebKit2/Scripts/generate-messages-header.py WebProcess/WebPage/WebPage.messages.in > /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_webkit2-gtk/webkit2-gtk/work/build/DerivedSources/WebKit2/WebPageMessages.h

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