Index: head/CHANGES
===================================================================
--- head/CHANGES
+++ head/CHANGES
@@ -11,7 +11,34 @@
 All ports committers are allowed to commit to this file.
 
 20160824:
+AUTHOR: mat@FreeBSD.org
+
+  To complete the USE_GITHUB framework, a GH_SUBDIR variable has been added.
+  It automatically moves a secondary distfile to the right place inside WRKSRC.
+  It also extends the GH_TUPLE variable to make it as easy to use as possible.
+
+  Before:
+
+    GH_TUPLE=   Regaddi:Chart.js:f13f99b:chart_js \
+                FVANCOP:ChartNew.js:77e7f87:chartnew_js
+    post-extract:
+            @${RMDIR} ${WRKSRC}/database ${WRKSRC}/3rd/Chart.js
+            @${MV} ${WRKSRC_database} ${WRKSRC}/database
+            @${MV} ${WRKSRC_chart_js} ${WRKSRC}/3rd/Chart.js
+
+  After:
+
+    GH_TUPLE=   Regaddi:Chart.js:f13f99b:chart_js/3rd/Chart.js \
+                FVANCOP:ChartNew.js:77e7f87:chartnew_js/3rd/ChartNew.js
+
+  It also works if not using GH_TUPLE but the regular
+  GH_ACCOUNT/PROJECT/TAGNAME variables:
+
+    GH_SUBDIR=  3rd/Chart.js:chart_js 3rd/ChartNew.js:chartnew_js
+
+20160824:
 AUTHOR: kde@FreeBSD.org
+
   A new USES file has been introduced: USES=kde:4, which replaces the old 
   bsd.kde4.mk file in preparation for upcoming KDE Frameworks and Plasma5 
   ports. 
@@ -42,8 +69,8 @@
   From time to time, the values are too generic, and they get in the way of
   other stuff.
 
-  This adds the possibility to have a `VAR_regex=regex` that will be used
-  instead of the `VAR=string` to search for possible replacements.
+  This adds the possibility to have a VAR_regex=regex that will be used
+  instead of the VAR=string to search for possible replacements.
 
   For example, in lang/perl5*, there is PERL_ARCH=mach, which will get replaced
   in paths if a file is called, say "machine", will end up being
Index: head/Mk/bsd.port.mk
===================================================================
--- head/Mk/bsd.port.mk
+++ head/Mk/bsd.port.mk
@@ -5276,7 +5276,7 @@
 				150:extract-depends 190:clean-wrkdir 200:${EXTRACT_WRKDIR} \
 				300:pre-extract 450:pre-extract-script 500:do-extract \
 				700:post-extract 850:post-extract-script \
-				${_OPTIONS_extract} ${_USES_extract}
+				${_OPTIONS_extract} ${_USES_extract} ${_SITES_extract}
 _PATCH_DEP=		extract
 _PATCH_SEQ=		050:ask-license 100:patch-message 150:patch-depends \
 				300:pre-patch 450:pre-patch-script 500:do-patch \
Index: head/Mk/bsd.sites.mk
===================================================================
--- head/Mk/bsd.sites.mk
+++ head/Mk/bsd.sites.mk
@@ -514,7 +514,11 @@
 #                 Using the name of a branch here is incorrect. It is
 #                 possible to do GH_TAGNAME= GIT_HASH to do a snapshot.
 #                 default: ${DISTVERSION}
-# GH_TUPLE      - above shortened to account:project:tagname[:group]
+#
+# GH_SUBDIR     - directory relative to WRKSRC where to move this distfile's
+#                 content after extracting.
+#
+# GH_TUPLE      - above shortened to account:project:tagname[:group][/subdir]
 #
 .if defined(USE_GITHUB)
 .  if defined(GH_TAGNAME) && ${GH_TAGNAME} == master
@@ -523,18 +527,19 @@
 		not "reroll" as soon as the branch is updated
 .  endif
 .  if defined(GH_TUPLE)
-.for _tuple in ${GH_TUPLE}
+.    for _tuple in ${GH_TUPLE}
 _t_tmp=${_tuple}
-.if ${_t_tmp:C@^([^:]*):([^:]*):([^:]*)((:[^:]*)?)@\4@:S/://:C/[a-zA-Z0-9_]//g}
+.      if ${_t_tmp:C@^([^:]*):([^:]*):([^:]*)((:[^:/]*)?)((/.*)?)@\4@:S/://:C/[a-zA-Z0-9_]//g}
 check-makevars::
 	@${ECHO_MSG} "The ${_tuple} GH_TUPLE line has"
 	@${ECHO_MSG} "a tag containing something else than [a-zA-Z0-9_]"
 	@${FALSE}
-.endif
-.endfor
-GH_ACCOUNT+=	${GH_TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:]*)?)@\1\4@}
-GH_PROJECT+=	${GH_TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:]*)?)@\2\4@}
-GH_TAGNAME+=	${GH_TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:]*)?)@\3\4@}
+.      endif
+.    endfor
+GH_ACCOUNT+=	${GH_TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:/]*)?)((/.*)?)@\1\4@}
+GH_PROJECT+=	${GH_TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:/]*)?)((/.*)?)@\2\4@}
+GH_TAGNAME+=	${GH_TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:/]*)?)((/.*)?)@\3\4@}
+GH_SUBDIR+=	${GH_TUPLE:C@^([^:]*):([^:]*):([^:]*)((:[^:/]*)?)((/.*)?)@\6\4@:M/*:S/^\///}
 .  endif
 # We are cheating and using backend URLS for Github here. See ports/194898
 # comment #15 for explanation as to why and how to deal with it if it breaks.
@@ -613,11 +618,32 @@
 GH_TAGNAME_DEFAULT=	${_T:C@^(.*):[^/:]+$@\1@}
 .    endif
 .  endfor
+.  for _S in ${GH_SUBDIR}
+_S_SEMP=	${_S:S/^${_S:C@:[^/:]+$@@}//:S/^://}
+.    if !empty(_S_SEMP)
+.      for _group in ${_S_SEMP:S/,/ /g}
+_G_SEMP=	${_group}
+.        if ${_G_SEMP} == all || ${_G_SEMP} == ALL || ${_G_SEMP} == default
+check-makevars::
+		@${ECHO_MSG} "Makefile error: the words all, ALL and default are reserved and cannot be"
+		@${ECHO_MSG} "used in group definitions. Please fix your GH_SUBDIR"
+		@${FALSE}
+.        endif
+.        if !${_GITHUB_GROUPS:M${_group}}
+_GITHUB_GROUPS+=	${_group}
+.         endif
+GH_SUBDIR_${_group}=	${_S:C@^(.*):[^/:]+$@\1@}
+.      endfor
+.    else
+GH_SUBDIR_DEFAULT=	${_S:C@^(.*):[^/:]+$@\1@}
+.    endif
+.  endfor
 # Put the default values back into the variables so that the *default* behavior
 # is not changed.
 GH_ACCOUNT:=	${GH_ACCOUNT_DEFAULT}
 GH_PROJECT:=	${GH_PROJECT_DEFAULT}
 GH_TAGNAME:=	${GH_TAGNAME_DEFAULT}
+GH_SUBDIR:=	${GH_SUBDIR_DEFAULT}
 .  if defined(GH_TAGNAME)
 GH_TAGNAME_SANITIZED=	${GH_TAGNAME:S,/,-,}
 # Github silently converts tags starting with v to not have v in the filename
@@ -644,6 +670,13 @@
 .  if !${USE_GITHUB:Mnodefault} && defined(_GITHUB_MUST_SET_DISTNAME)
 DISTFILES+=	${DISTNAME}${_GITHUB_EXTRACT_SUFX}
 .  endif
+.  if !empty(GH_SUBDIR)
+_SITES_extract:=	690:post-extract-gh-DEFAULT
+post-extract-gh-DEFAULT:
+	@${RMDIR} ${WRKSRC}/${GH_SUBDIR} 2>/dev/null || :
+	@${MKDIR} ${WRKSRC}/${GH_SUBDIR:H} 2>/dev/null || :
+	@${LN} -s ${GH_SUBDIR:C/[^\/]//g:C/\//..\//g} ${WRKSRC}/${GH_SUBDIR}
+.  endif
 # If there are non default groups
 .  if !empty(_GITHUB_GROUPS:NDEFAULT)
 # Then for each of the remaining groups, add DISTFILES and MASTER_SITES
@@ -660,6 +693,13 @@
 DISTFILES:=	${DISTFILES} ${DISTFILE_${_group}}:${_group}
 MASTER_SITES:=	${MASTER_SITES} ${MASTER_SITE_GITHUB:S@%SUBDIR%@${GH_ACCOUNT_${_group}}/${GH_PROJECT_${_group}}/tar.gz/${GH_TAGNAME_${_group}}?dummy=/:${_group}@}
 WRKSRC_${_group}:=	${WRKDIR}/${GH_PROJECT_${_group}}-${GH_TAGNAME_${_group}_EXTRACT}
+.      if !empty(GH_SUBDIR_${_group})
+_SITES_extract:=	${_SITES_extract} 690:post-extract-gh-${_group}
+post-extract-gh-${_group}:
+	@${RMDIR} ${WRKSRC}/${GH_SUBDIR_${_group}} 2>/dev/null || :
+	@${MKDIR} ${WRKSRC}/${GH_SUBDIR_${_group}:H} 2>/dev/null || :
+	@${MV} ${WRKSRC_${_group}} ${WRKSRC}/${GH_SUBDIR_${_group}}
+.      endif
 .    endfor
 .  endif
 .endif # defined(USE_GITHUB)