Merge pull request #1539 from nextstrain/victorlin/builddir-env-var

Author: ivan-aksamentov

docs/Makefile

@@ -2,11 +2,11 @@
 #
 
 # You can set these variables from the command line, and also
-# from the environment for the first two.
+# from the environment for the first three.
 SPHINXOPTS    ?=
 SPHINXBUILD   ?= sphinx-build
+BUILDDIR      ?= build
 SOURCEDIR     = .
-BUILDDIR      = build
 
 # Put it first so that "make" without argument is like "make help".
 help:

docs/make.bat

@@ -7,8 +7,10 @@ REM Command file for Sphinx documentation
 if "%SPHINXBUILD%" == "" (
 	set SPHINXBUILD=sphinx-build
 )
+if "%BUILDDIR%" == "" (
+	set BUILDDIR=build
+)
 set SOURCEDIR=.
-set BUILDDIR=build
 
 if "%1" == "" goto help