make most vars immediate

Makefile

@@ -1,30 +1,30 @@
-DATADIR  = data
+DATADIR  := data
-TMPDIR   = _tmp
+TMPDIR   := _tmp
-BUILDDIR = _build
+BUILDDIR := _build
-INFONAME = info.yaml
+INFONAME := info.yaml
-ROOT     = https://gallery.niss.website
+ROOT     := https://gallery.niss.website
 
 # SMALL = thumbnails, MED = single pages (link to full size)
 SMALL := 200
 MEDW  := 1000
 MEDH  := 1200
 
-MAKEPAGES = $(TMPDIR)/make-pages
+MAKEPAGES := $(TMPDIR)/make-pages
 
 YAMLS != find $(DATADIR) -name $(INFONAME)
 
 SCRIPTS := $(wildcard script/*.js)
 
-STYLES := $(wildcard style/*.css)
+STYLES    := $(wildcard style/*.css)
-STYLESVGS = $(wildcard style/*.svg)
+STYLESVGS := $(wildcard style/*.svg)
-STYLEPNGS = $(wildcard style/*.png)
+STYLEPNGS := $(wildcard style/*.png)
 
 FONTS := $(shell find fonts \
   -iname '*.eot'   -or -iname '*.svg'  -or \
   -iname '*.ttf'   -or -iname '*.woff' -or \
   -iname '*.woff2' -or -iname '*.css')
 
-STATIC := $(SCRIPTS) $(STYLES) $(STYLEPNGS) $(STYLESVGS) $(FONTS)
+STATIC  := $(SCRIPTS) $(STYLES) $(STYLEPNGS) $(STYLESVGS) $(FONTS)
 BSTATIC := $(patsubst %,$(BUILDDIR)/%,$(STATIC))
 
 .PHONY: all build
@@ -74,10 +74,10 @@ distclean: clean
 	rm -rf dist-newstyle
 
 
-HOST ?= gallery.niss.website
+HOST        ?= gallery.niss.website
 REMOTE_USER ?= www-data
-IDFILE ?= ~/.ssh/xyz
+IDFILE      ?= ~/.ssh/xyz
-REMOTE_DIR ?= gallery
+REMOTE_DIR  ?= gallery
 
 .PHONY: upload
 upload: build