builddeb: add --distid option to specify Distributor ID

This allows builddeb to handle distributions that are not Debian.

Distributor ID is reported by lsb_release --id, and in case of builddeb it's
usually Debian or Ubuntu.

Makefile

@@ -162,11 +162,11 b' osx:'
 
 deb:
 	mkdir -p packages/debian-unknown
-	contrib/builddeb --codename unknown
+	contrib/builddeb --distid debian --codename unknown
 
 docker-debian-jessie:
 	mkdir -p packages/debian-jessie
-	contrib/dockerdeb jessie
+	contrib/dockerdeb debian jessie
 
 fedora20:
 	mkdir -p packages/fedora20

contrib/builddeb

@@ -8,9 +8,15 b''
 
 BUILD=1
 CLEANUP=1
+DISTID=debian
 CODENAME=jessie
 while [ "$1" ]; do
     case "$1" in
+    --distid )
+        shift
+        DISTID="$1"
+        shift
+        ;;
     --codename )
         shift
         CODENAME="$1"
@@ -82,7 +88,7 b' if [ "$BUILD" ]; then'
 fi
 if [ "$CLEANUP" ] ; then
     echo
-    OUTPUTDIR=${OUTPUTDIR:=packages/debian-$CODENAME}
+    OUTPUTDIR=${OUTPUTDIR:=packages/$DISTID-$CODENAME}
     find ../mercurial*.deb ../mercurial_*.build ../mercurial_*.changes \
           -type f -newer $control -print0 | \
       xargs -Inarf -0 mv narf "$OUTPUTDIR"

contrib/dockerdeb

@@ -8,8 +8,9 b' export ROOTDIR=$(cd $BUILDDIR/..; pwd)'
 
 checkdocker
 
-CODENAME="$1"
-PLATFORM="debian-$1"
+DISTID="$1"
+CODENAME="$2"
+PLATFORM="$1-$2"
 shift # extra params are passed to build process
 
 OUTPUTDIR=${OUTPUTDIR:=$ROOTDIR/packages/$PLATFORM}
@@ -26,8 +27,8 b' if [ $(uname) = "Darwin" ] ; then'
             sh -c "cd /mnt/$dn && make clean && make local"
 fi
 $DOCKER run -u $DBUILDUSER --rm -v $PWD/..:/mnt $CONTAINER \
-  sh -c "cd /mnt/$dn && DEB_BUILD_OPTIONS='${DEB_BUILD_OPTIONS:=}' contrib/builddeb --build --codename $CODENAME"
-contrib/builddeb --cleanup --codename $CODENAME
+  sh -c "cd /mnt/$dn && DEB_BUILD_OPTIONS='${DEB_BUILD_OPTIONS:=}' contrib/builddeb --build --distid $DISTID --codename $CODENAME"
+contrib/builddeb --cleanup --distid $DISTID --codename $CODENAME
 if [ $(uname) = "Darwin" ] ; then
     $DOCKER run -u $DBUILDUSER --rm -v $PWD/..:/mnt $CONTAINER \
             sh -c "cd /mnt/$dn && make clean"