gitian: sort generated source distribution archive for windows

Make the bitcoin-X.X.X.tar.gz deterministic.

contrib/gitian-descriptors/gitian-win.yml

@@ -35,6 +35,7 @@ script: |
   export TZ=UTC
   INDIR=$HOME/build
   OPTFLAGS='-O2'
+  TEMPDIR="$HOME/tempdir"
   NEEDDIST=1
   # Qt: workaround for determinism in resource ordering
   #  Qt5's rcc uses a QHash to store the files for the resource.
@@ -54,6 +55,7 @@ script: |
     else
       HOST=x86_64-w64-mingw32
     fi
+    export PATH=$STAGING/host/bin:$PATH
     mkdir -p $STAGING $BUILDDIR $BINDIR
     #
     cd $STAGING
@@ -63,22 +65,18 @@ script: |
     unzip $INDIR/protobuf-win${BITS}-2.5.0-gitian-r4.zip
     if [ "$NEEDDIST" == "1" ]; then
       # Make source code archive which is architecture independent so it only needs to be done once
-      cd $HOME/build/
+      cd $HOME/build/bitcoin
-      cd bitcoin
-      export PATH=$STAGING/host/bin:$PATH
-      export TAR_OPTIONS=--mtime=`echo $REFERENCE_DATETIME | awk '{ print $1 }'`
       ./autogen.sh
       ./configure --bindir=$OUTDIR --prefix=$STAGING --host=$HOST --with-qt-plugindir=$STAGING/plugins  --with-qt-incdir=$STAGING/include --with-qt-bindir=$STAGING/host/bin --with-boost=$STAGING --disable-maintainer-mode --with-protoc-bindir=$STAGING/host/bin --disable-dependency-tracking CPPFLAGS="-I$STAGING/include ${OPTFLAGS}" LDFLAGS="-L$STAGING/lib ${OPTFLAGS}" CXXFLAGS="-frandom-seed=bitcoin ${OPTFLAGS}"
       make dist
-      mkdir -p $OUTDIR/src
+      DISTNAME=`echo bitcoin-*.tar.gz`
-      cp -f bitcoin-*.tar.* $OUTDIR/src
       NEEDDIST=0
     fi
     # Build platform-dependent executables from source archive
     cd $BUILDDIR
     mkdir -p distsrc
     cd distsrc
-    tar --strip-components=1 -xf $HOME/build/bitcoin/bitcoin-*.tar.*
+    tar --strip-components=1 -xf $HOME/build/bitcoin/$DISTNAME
     ./configure --bindir=$BINDIR --prefix=$STAGING --host=$HOST --with-qt-plugindir=$STAGING/plugins  --with-qt-incdir=$STAGING/include --with-qt-bindir=$STAGING/host/bin --with-boost=$STAGING --disable-maintainer-mode --with-protoc-bindir=$STAGING/host/bin --disable-dependency-tracking CPPFLAGS="-I$STAGING/include ${OPTFLAGS}" LDFLAGS="-L$STAGING/lib ${OPTFLAGS}" CXXFLAGS="-frandom-seed=bitcoin ${OPTFLAGS}"
     export LD_PRELOAD=/usr/lib/faketime/libfaketime.so.1
     export FAKETIME=$REFERENCE_DATETIME
@@ -90,3 +88,10 @@ script: |
     unset FAKETIME
   done # for BITS in
 
+  # sort distribution tar file and normalize user/group/mtime information for deterministic output
+  mkdir -p $OUTDIR/src
+  rm -rf $TEMPDIR
+  mkdir -p $TEMPDIR
+  cd $TEMPDIR
+  tar -xvf $HOME/build/bitcoin/$DISTNAME | sort | tar --no-recursion -cT /dev/stdin --mode='u+rw,go+r-w,a+X' --owner=0 --group=0 --mtime="$REFERENCE_DATETIME" | gzip -n > $OUTDIR/src/$DISTNAME
+