Incorrect PATH scan results in extensions not found

[Patrick Monnerat]

When the PATH environment variable contains a null component (to force current
dir lookup), subsequent components are not used for extension lookup.
This results in missing existing programs, thus disabling some importation
extensions.

Version: inkscape-0.48.1-1.fc14.1.x86_64

See https://bugzilla.redhat.com/show_bug.cgi?id=701390

[Patrick (patrick-redhat-bugs)]

Description of problem:
When the PATH environment variable contains a null component (to force current dir lookup), subsequent components are not used for extension lookup.
This results in missing existing programs, thus disabling some importation extensions.

Version-Release number of selected component (if applicable):
inkscape-0.48.1-1.fc14.1.x86_64

How reproducible:
Always

Steps to Reproduce:
1. prefix the PATH value with a colon (:) 'export PATH=":$PATH"'
2. run inkscape
3. Try to open a postscript (.ps) file ...

Actual results:
Cannot import a postscript file.

Expected results:
Proper importation and conversion of a postscript file, even in case of null component in the PATH.

Additional info:
The attached patch fixes the problem.
I did NOT report the bug and the path upstream.

[Patrick (patrick-redhat-bugs)]

Created attachment 496334
Patch fixing the problem

[Patrick (patrick-redhat-bugs)]

Reported upstream: https://bugs.launchpad.net/inkscape/+bug/801568

[su_v (suv-lp)]

Reproduced with Inkscape 0.48+devel r10627 on Mac OS X 10.5.8 (i386).

[Kris (kris-degussem)]

I could not reproduce the result on vista 64 bit, and current trunk.
The fix (at least second part) seemed quite obvious, so it is committed in trunk revision 11312.

[Patrick Monnerat (monnerat)]

@Kris: many thanks for commit

[su_v (suv-lp)]

@Kris - would it be save to backport the fix to 0.48.x?

[Patrick Monnerat (monnerat)]

FYI: I'm running 0.48.1 with this patch on Fedora 14 64bit since may 2, 2011 (happy birthday!). This is the stock Fedora package + the patch.

[Kris (kris-degussem)]

Backported in 0.48.x revision 9891 for inkscape 0.48.4.

[Fedora (fedora-redhat-bugs)]

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[su_v (suv-lp)]

Also fixes
- Bug #168747 “fails to search external commands for extensions”
  <https://bugs.launchpad.net/inkscape/+bug/168747>