[New] Add support for NVM_AUTH_HEADER env var

Closes #3366

Co-authored-by: David Welch <david@davidwelch.co>
Co-authored-by: Andre Kradolfer <narfdre@gmail.com>

Makefile

@@ -1,8 +1,8 @@
-# Since we rely on paths relative to the makefile location, abort if make isn't being run from there.
+	# Since we rely on paths relative to the makefile location, abort if make isn't being run from there.
 $(if $(findstring /,$(MAKEFILE_LIST)),$(error Please only invoke this makefile from the directory it resides in))
-# Note: With Travis CI:
+	# Note: With Travis CI:
-#  - the path to urchin is passed via the command line.
+	#  - the path to urchin is passed via the command line.
-#  - the other utilities are NOT needed, so we skip the test for their existence.
+	#  - the other utilities are NOT needed, so we skip the test for their existence.
 URCHIN := urchin
 ifeq ($(findstring /,$(URCHIN)),) # urchin path was NOT passed in.
 		# Add the local npm packages' bin folder to the PATH, so that `make` can find them, when invoked directly.
@@ -14,15 +14,15 @@ ifeq ($(findstring /,$(URCHIN)),) # urchin path was NOT passed in.
 		# Make sure that all required utilities can be located.
 	UTIL_CHECK := $(or $(shell PATH="$(PATH)" which $(UTILS) >/dev/null && echo 'ok'),$(error Did you forget to run `npm install` after cloning the repo? At least one of the required supporting utilities not found: $(UTILS)))
 endif
-# The files that need updating when incrementing the version number.
+	# The files that need updating when incrementing the version number.
 VERSIONED_FILES := nvm.sh install.sh README.md package.json
-# Define all shells to test with. Can be overridden with `make SHELLS=... <target>`.
+	# Define all shells to test with. Can be overridden with `make SHELLS=... <target>`.
 SHELLS := sh bash dash zsh # ksh (#574)
-# Generate 'test-<shell>' target names from specified shells.
+	# Generate 'test-<shell>' target names from specified shells.
-# The embedded shell names are extracted on demand inside the recipes.
+	# The embedded shell names are extracted on demand inside the recipes.
 SHELL_TARGETS := $(addprefix test-,$(SHELLS))
-# Define the default test suite(s). This can be overridden with `make TEST_SUITE=<...>  <target>`.
+	# Define the default test suite(s). This can be overridden with `make TEST_SUITE=<...>  <target>`.
-# Test suites are the names of subfolders of './test'.
+	# Test suites are the names of subfolders of './test'.
 TEST_SUITE := $(shell find ./test/* -type d -prune -exec basename {} \;)
 
 

README.md

@@ -535,11 +535,7 @@ NVM_IOJS_ORG_MIRROR=https://iojs.org/dist nvm install iojs-v1.0.3
 To pass an Authorization header through to the mirror url, set `$NVM_AUTH_HEADER`
 
 ```sh
-export NVM_NODEJS_ORG_MIRROR=https://nodejs.org/dist
+NVM_AUTH_HEADER="Bearer secret-token" nvm install node
-export NVM_AUTH_HEADER="Bearer secret-token"
-nvm install node
-
-NVM_NODEJS_ORG_MIRROR=https://nodejs.org/dist NVM_AUTH_HEADER="Bearer secret-token" nvm install 4.2
 ```
 
 ### .nvmrc