Merge #15601: build: depends: Switch to python3 (take 3)

fa0f92af9a build: depends: Switch to python3 (MarcoFalke)

Pull request description:

  Actually try to switch to python3 after the incomplete attempts:

  *  Remove Python2 support #11881
  *  build: Require python 3.5 #14954
  * ...

Tree-SHA512: ba689c3788f2dd91c15d4ff5f6a73219c1a73893c18d3bb8e6da5c35acfef9897c7e100439ce5cac05624c66f7619d13528b60065c36545608fb387aab25e117

.travis.yml

@@ -158,7 +158,7 @@ jobs:
       name: 'macOS 10.10  [GOAL: deploy] [no functional tests]'
       env: >-
         HOST=x86_64-apple-darwin14
-        PACKAGES="cmake imagemagick libcap-dev librsvg2-bin libz-dev libbz2-dev libtiff-tools python3-dev python3-setuptools-git"
+        PACKAGES="cmake imagemagick libcap-dev librsvg2-bin libz-dev libbz2-dev libtiff-tools python3-dev python3-setuptools"
         OSX_SDK=10.11
         RUN_UNIT_TESTS=false
         RUN_FUNCTIONAL_TESTS=false

depends/config.site.in

@@ -67,7 +67,7 @@ fi
 if test -n "@CXX@" -a -z "${CXX}"; then
   CXX="@CXX@"
 fi
-PYTHONPATH=$depends_prefix/native/lib/python/dist-packages:$PYTHONPATH
+PYTHONPATH=$depends_prefix/native/lib/python3/dist-packages:$PYTHONPATH
 
 if test -n "@AR@"; then
   AR=@AR@

depends/packages/native_biplist.mk

@@ -3,13 +3,13 @@ $(package)_version=1.0.3
 $(package)_download_path=https://bitbucket.org/wooster/biplist/downloads
 $(package)_file_name=biplist-$($(package)_version).tar.gz
 $(package)_sha256_hash=4c0549764c5fe50b28042ec21aa2e14fe1a2224e239a1dae77d9e7f3932aa4c6
-$(package)_install_libdir=$(build_prefix)/lib/python/dist-packages
+$(package)_install_libdir=$(build_prefix)/lib/python3/dist-packages
 
 define $(package)_build_cmds
-    python setup.py build
+    python3 setup.py build
 endef
 
 define $(package)_stage_cmds
     mkdir -p $($(package)_install_libdir) && \
-    python setup.py install --root=$($(package)_staging_dir) --prefix=$(build_prefix) --install-lib=$($(package)_install_libdir)
+    python3 setup.py install --root=$($(package)_staging_dir) --prefix=$(build_prefix) --install-lib=$($(package)_install_libdir)
 endef

depends/packages/native_ds_store.mk

@@ -3,14 +3,14 @@ $(package)_version=1.1.2
 $(package)_download_path=https://github.com/al45tair/ds_store/archive/
 $(package)_file_name=v$($(package)_version).tar.gz
 $(package)_sha256_hash=3b3ecb7bf0a5157f5b6010bc3af7c141fb0ad3527084e63336220d22744bc20c
-$(package)_install_libdir=$(build_prefix)/lib/python/dist-packages
+$(package)_install_libdir=$(build_prefix)/lib/python3/dist-packages
 $(package)_dependencies=native_biplist
 
 define $(package)_build_cmds
-    python setup.py build
+    python3 setup.py build
 endef
 
 define $(package)_stage_cmds
     mkdir -p $($(package)_install_libdir) && \
-    python setup.py install --root=$($(package)_staging_dir) --prefix=$(build_prefix) --install-lib=$($(package)_install_libdir)
+    python3 setup.py install --root=$($(package)_staging_dir) --prefix=$(build_prefix) --install-lib=$($(package)_install_libdir)
 endef

depends/packages/native_mac_alias.mk

@@ -3,13 +3,13 @@ $(package)_version=2.0.7
 $(package)_download_path=https://github.com/al45tair/mac_alias/archive/
 $(package)_file_name=v$($(package)_version).tar.gz
 $(package)_sha256_hash=6f606d3b6bccd2112aeabf1a063f5b5ece87005a5d7e97c8faca23b916e88838
-$(package)_install_libdir=$(build_prefix)/lib/python/dist-packages
+$(package)_install_libdir=$(build_prefix)/lib/python3/dist-packages
 
 define $(package)_build_cmds
-    python setup.py build
+    python3 setup.py build
 endef
 
 define $(package)_stage_cmds
     mkdir -p $($(package)_install_libdir) && \
-    python setup.py install --root=$($(package)_staging_dir) --prefix=$(build_prefix) --install-lib=$($(package)_install_libdir)
+    python3 setup.py install --root=$($(package)_staging_dir) --prefix=$(build_prefix) --install-lib=$($(package)_install_libdir)
 endef