[gimp] Issue #788: also install all python plug-ins in their own directory.

[Jehan <jehanp src gnome org>]

commit dbb9555d2f22b796b490d205563bdd272159f05d
Author: Jehan <jehan girinstud io>
Date:   Wed Jul 18 22:06:12 2018 +0200

    Issue #788: also install all python plug-ins in their own directory.
    
    It seems I forgot to also install python plug-ins in a subdirectory
    (because they are deactivated on master for the time being). I even
    found a year-old patch from myself rotting in the tracker, and which was
    doing exactly this.
    I redid it, improved to fit changes.

 plug-ins/pygimp/plug-ins/Makefile.am | 37 +++++++++++++++++++-----------------
 1 file changed, 20 insertions(+), 17 deletions(-)
---
diff --git a/plug-ins/pygimp/plug-ins/Makefile.am b/plug-ins/pygimp/plug-ins/Makefile.am
index 600c681760..82d5a5bba7 100644
--- a/plug-ins/pygimp/plug-ins/Makefile.am
+++ b/plug-ins/pygimp/plug-ins/Makefile.am
@@ -3,28 +3,31 @@
 pluginexecdir = $(gimpplugindir)/plug-ins
 
 scripts = \
-       colorxhtml.py                   \
-       file-openraster.py              \
-       foggify.py                      \
-       gradients-save-as-css.py        \
-       histogram-export.py             \
-       palette-offset.py               \
-       palette-sort.py                 \
-       palette-to-gradient.py          \
-       py-slice.py                     \
-       python-eval.py
+       colorxhtml/colorxhtml.py                        \
+       file-openraster/file-openraster.py              \
+       foggify/foggify.py                              \
+       gradients-save-as-css/gradients-save-as-css.py  \
+       histogram-export/histogram-export.py            \
+       palette-offset/palette-offset.py                \
+       palette-sort/palette-sort.py                    \
+       palette-to-gradient/palette-to-gradient.py      \
+       py-slice/py-slice.py                            \
+       python-eval/python-eval.py
 
 test_scripts = \
-       benchmark-foreground-extract.py \
-       clothify.py                     \
-       shadow_bevel.py                 \
-       sphere.py                       \
-       whirlpinch.py
+       benchmark-foreground-extract/benchmark-foreground-extract.py    \
+       clothify/clothify.py                                            \
+       shadow_bevel/shadow_bevel.py                                    \
+       sphere/sphere.py                                                \
+       whirlpinch/whirlpinch.py
 
-pluginexec_SCRIPTS = $(scripts)
+%.py:
+       mkdir -p $(@D) && cp -f $(srcdir)/$(@F) $@
+
+nobase_pluginexec_SCRIPTS = $(scripts)
 
 if GIMP_UNSTABLE
-pluginexec_SCRIPTS += $(test_scripts)
+nobase_pluginexec_SCRIPTS += $(test_scripts)
 endif
 
 # python-console has a data file.