[gimp] plug-ins: install the pygimp.interp file.

[Jehan <jehanp src gnome org>]

commit aab75bb1d00bf008004883980a447591c65121ea
Author: Jehan <jehan girinstud io>
Date:   Mon Jul 29 14:25:44 2019 +0200

    plug-ins: install the pygimp.interp file.
    
    Python scripts should already properly run, whether you run them with a
    direct python shebang or a `env python` one (cf. previous commit). But
    it's still nice to install a `.interp` file, which allows to control
    exactly the interpreter to use, overriding the shebang. With this file,
    Python scripts will use installation-time Python interpreter.
    
    Also update old code to make the interp contents about Python 3 instead
    of 2.

 plug-ins/pygimp/Makefile.am | 13 ++-----------
 plug-ins/python/Makefile.am | 17 +++++++++++++++++
 2 files changed, 19 insertions(+), 11 deletions(-)
---
diff --git a/plug-ins/pygimp/Makefile.am b/plug-ins/pygimp/Makefile.am
index 801b78a8d2..be2da76c1e 100644
--- a/plug-ins/pygimp/Makefile.am
+++ b/plug-ins/pygimp/Makefile.am
@@ -143,26 +143,17 @@ codegen_files = \
        gimpui.override
 
 pyenvdir = $(gimpplugindir)/environ
-pyinterpdir = $(gimpplugindir)/interpreters
 
 pyenvfile = $(pyenvdir)/pygimp.env
-pyinterpfile = $(pyinterpdir)/pygimp.interp
 
 install-env-file:
        $(mkinstalldirs) '$(DESTDIR)$(pyenvdir)'
        echo '$(path_separator) PYTHONPATH=$${gimp_plug_in_dir}/$(pygimpbase)' > '$(DESTDIR)$(pyenvfile)'
 
-install-interp-file:
-       $(mkinstalldirs) '$(DESTDIR)$(pyinterpdir)'
-       echo 'python=$(PYBIN_PATH)' > '$(DESTDIR)$(pyinterpfile)'
-       echo 'python2=$(PYBIN_PATH)' >> '$(DESTDIR)$(pyinterpfile)'
-       echo '/usr/bin/python=$(PYBIN_PATH)' >> '$(DESTDIR)$(pyinterpfile)'
-       echo ":Python:E::py::`basename $(PYTHON)`:" >> '$(DESTDIR)$(pyinterpfile)'
-
-install-data-local: install-env-file install-interp-file
+install-data-local: install-env-file
 
 uninstall-local:
-       rm -f '$(DESTDIR)$(pyenvfile)' '$(DESTDIR)$(pyinterpfile)'
+       rm -f '$(DESTDIR)$(pyenvfile)'
 
 EXTRA_DIST = \
        $(pygimp_DATA)          \
diff --git a/plug-ins/python/Makefile.am b/plug-ins/python/Makefile.am
index dd87529169..039d10d2fc 100644
--- a/plug-ins/python/Makefile.am
+++ b/plug-ins/python/Makefile.am
@@ -62,3 +62,20 @@ EXTRA_DIST = \
 #      $(console_scripts)
 
 CLEANFILES = $(scripts) $(test_scripts)
+
+# Python interpreter file.
+
+pyinterpdir = $(gimpplugindir)/interpreters
+pyinterpfile = $(pyinterpdir)/pygimp.interp
+
+install-interp-file:
+       $(mkinstalldirs) '$(DESTDIR)$(pyinterpdir)'
+       echo 'python=$(PYBIN_PATH)' > '$(DESTDIR)$(pyinterpfile)'
+       echo 'python3=$(PYBIN_PATH)' >> '$(DESTDIR)$(pyinterpfile)'
+       echo '/usr/bin/python=$(PYBIN_PATH)' >> '$(DESTDIR)$(pyinterpfile)'
+       echo ":Python:E::py::`basename $(PYTHON)`:" >> '$(DESTDIR)$(pyinterpfile)'
+
+install-data-local: install-interp-file
+
+uninstall-local:
+       rm -f '$(DESTDIR)$(pyinterpfile)'