Install all npm prereqs locally on demand

Makefile

@@ -1,11 +1,13 @@
+export PATH := $(PWD)/node_modules/.bin:$(PATH)
+
 MATRIX_REPO ?= git@github.com:perlpunk/yaml-test-matrix
 
 default: help
 
 help:
 	@grep -E '^[-a-zA-Z0-9]+:' Makefile | cut -d: -f1
 
-update: doc
+update: doc node_modules
 	rm -fr test/name/ test/tags/
 	perl bin/generate-links test/*.tml
 	git add -A -f test/
@@ -21,6 +23,8 @@ data:
 	git worktree add -f $@ $@
 
 data-update: data node_modules
+	@echo $(PATH)
+	which coffee
 	rm -fr data/*
 	bin/generate-data test/*.tml
 
@@ -41,7 +45,7 @@ data-push:
 
 node_modules:
 	mkdir $@
-	npm install lodash testml-compiler
+	npm install coffeescript lodash testml-compiler
 	rm -f package*
 
 #------------------------------------------------------------------------------

ReadMe.pod

@@ -59,4 +59,14 @@ To get a quick overview of the tests you can have a look at the L<YAML Test
 Matrix|http://matrix.yaml.io/> -
 L<https://github.com/perlpunk/yaml-test-matrix>.
 
+=head2 Updating Things
+
+When test files change you need to update various artifacts. To do this, run
+the following commands:
+
+C<>C< make update # Updates tags and name artifacts make data-update # Updates
+the data branch (under ./data/) >C<>
+
+You will need Bash, NodeJS and Perl for these things.
+
 =cut

doc/yaml-test-suite.swim

@@ -34,15 +34,14 @@ To get a quick overview of the tests you can have a look at the "YAML Test
 Matrix"[http://matrix.yaml.io/]
 - [https://github.com/perlpunk/yaml-test-matrix].
 
-== Updating the Data Branch
+== Updating Things
 
-To update the data branch under a directory called `data`, run:
-```
-make data-update`
-```
+When test files change you need to update various artifacts. To do this, run
+the following commands:
 
-You will need NodeJS and CoffeeScript. To install `coffee` after you have
-`node`, run:
 ```
-npm install -g coffee
+make update         # Updates tags and name artifacts
+make data-update    # Updates the data branch (under ./data/)
 ```
+
+You will need Bash, NodeJS and Perl for these things.