gimp2-launcher: add new port

gimp2-launcher is an alternative to gimp-app.
The major difference to end users is the icons.

aqua/gimp-app/Portfile

@@ -26,6 +26,8 @@ checksums       sha1    e923c2b145814db35a747ef947ba1ce7da32edbc \
 
 worksrcdir      GIMPskel/ScriptExecCocoa
 
+conflicts-append gimp2-launcher
+
 set gimpapp     ${workpath}/GIMPskel/GIMP.app
 
 post-extract {

aqua/gimp2-launcher/Portfile

@@ -0,0 +1,62 @@
+# -*- coding: utf-8; mode: tcl; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- vim:fenc=utf-8:ft=tcl:et:sw=4:ts=4:sts=4
+
+PortSystem          1.0
+
+name                gimp2-launcher
+# should match gimp2 version
+version             2.8.18
+categories          aqua graphics
+platforms           darwin
+license             GPL-3+
+maintainers         mcalhoun openmaintainer
+description         GIMP.app application bundle
+long_description    ${description}
+homepage            http://www.gimp.org/
+set branch          [join [lrange [split ${version} .] 0 1] .]
+master_sites        gimp:gimp/v${branch}/osx
+
+# name has an architecture in it, but we delete architecture dependent components
+distfiles           gimp-${version}-x86_64-1.dmg
+
+checksums           rmd160  1614a7a2b1417995e452c1b82b93a43d4927fc3a \
+                    sha256  e9f67f7a8b29871a977bb3d1c9129e473da2a52c3b46c2d42663cbbf939ded68
+
+use_configure       no
+supported_archs     noarch
+
+#use_dmg             yes
+# use_dmg requires root access
+# unable to reproduce error in portextract.tcl that justifies this
+set dmg_mount [mkdtemp "/tmp/mports.XXXXXXXX"]
+option extract.cmd [findBinary hdiutil ${portutil::autoconf::hdiutil_path}]
+option extract.pre_args attach
+option extract.post_args "-private -readonly -nobrowse -mountpoint \\\"${dmg_mount}\\\" && cd \\\"${dmg_mount}\\\" && [findBinary find ${portutil::autoconf::find_path}] . -depth -perm -+r -print0 | [findBinary cpio ${portutil::autoconf::cpio_path}] -0 -p -d -m -u \\\"${extract.dir}/${distname}\\\"; status=\$?; cd / && ${extract.cmd} detach \\\"${dmg_mount}\\\" && [findBinary rmdir ${portutil::autoconf::rmdir_path}] \\\"${dmg_mount}\\\"; exit \$status"
+
+conflicts-append    gimp-app
+depends_run-append  path:bin/gimp:gimp2
+
+patchfiles-append   patch-Info.plist.diff
+
+post-extract {
+    delete {*}[glob ${worksrcpath}/GIMP.app/Contents/Resources/*.lproj]
+    delete ${worksrcpath}/GIMP.app/Contents/Resources/bin
+    delete ${worksrcpath}/GIMP.app/Contents/Resources/etc
+    delete ${worksrcpath}/GIMP.app/Contents/Resources/share
+    delete ${worksrcpath}/GIMP.app/Contents/Resources/lib
+    delete {*}[glob ${worksrcpath}/GIMP.app/Contents/MacOS/*]
+}
+
+build {
+    set script [open "${worksrcpath}/GIMP.app/Contents/MacOS/GIMP" w 0755]
+    puts ${script} "#!/bin/sh"
+    puts ${script} ""
+    puts ${script} "exec ${prefix}/bin/gimp"
+    close ${script}
+}
+
+destroot {
+    copy ${worksrcpath}/GIMP.app ${destroot}${applications_dir}
+}
+
+livecheck.url       https://github.com/macports/macports-ports/blob/master/graphics/gimp2/Portfile
+livecheck.regex     {version +(\d+(?:\.\d+)*)}

aqua/gimp2-launcher/files/patch-Info.plist.diff

@@ -0,0 +1,16 @@
+--- GIMP.app/Contents/Info.plist.orig	2016-07-16 12:52:03.000000000 -0700
++++ GIMP.app/Contents/Info.plist	2017-01-15 05:57:02.000000000 -0700
+@@ -26,13 +26,6 @@
+ 		<string>2.8.18</string>
+ 		<key>NSHumanReadableCopyright</key>
+ 		<string>© 1995-2016 The GIMP Development Team</string>
+-		<key>LSMinimumSystemVersion</key>
+-		<string>10.6.0</string>
+-		<key>LSMinimumSystemVersionByArchitecture</key>
+-		<dict>
+-			<key>x86_64</key>
+-			<string>10.6.0</string>
+-		</dict>
+ 		<key>NSHighResolutionCapable</key>
+ 		<true />
+ 		<key>CFBundleDocumentTypes</key>