Merge pull request #79 from whiteinge/dev-envs-linux-osx

Dev env tweaks for Linux & OS X

.gitignore

@@ -1,2 +1,3 @@
 /pubs.opengroup.org
 /.image
+/.busybox

CONTRIBUTING.md

@@ -13,9 +13,14 @@ maintainability of the script.
 
 ### Development Environment
 
-A development environment can be quickly created if you have Docker installed
-by running `make dev` from the main repo directory. This will drop you into
-a shell with the local directory mounted as a volume.
+There are two ways to quickly create a consistent development environment.
+Although busybox is not completely POSIX compliant it's the closest out-of-box
+environment that I know of.
+
+- OS X (requires Docker): run `make docker` to drop you into an Alpine/busybox
+  shell with the local directory mounted as a volume.
+- Linux (requires busybox): run `make busybox` to create and populate
+  a directory of busybox symlinks and drop you into a shell with that path set.
 
 ### POSIX Documentation
 

Makefile

@@ -5,24 +5,40 @@ DESTDIR ?= $(HOME)
 DESTDIRB ?= /
 VERSION	:=
 
-.PHONY: dev
-dev : .image
+.PHONY: test
+test :
+	make -C tests all
+
+.PHONY: docker
+docker : .image
 	docker run -it --rm -v $$PWD:/oksh oksh
 
+# Remove this file to trigger a rebuild.
 .image :
 	docker build -t oksh .
 	touch $@
 
+.PHONY: busybox
+busybox : .busybox
+	env -i -- PATH=$$PWD/.busybox SHELL=sh $$PWD/.busybox/sh
+
+.busybox :
+	mkdir -p $$PWD/.busybox
+	busybox --install -s $$PWD/.busybox
+	ln -s $$(which curl) $$PWD/.busybox/curl
+	ln -s $$(which jq) $$PWD/.busybox/jq
+	ln -s $$(which make) $$PWD/.busybox/make
+	ln -s $$(which socat) $$PWD/.busybox/socat
+
+clean :
+	rm -f .image
+
 install : $(PROGRAM)
 	cp $(PROGRAM) "$(DESTDIR)/bin/"
 	chmod 755 "$(DESTDIR)/bin/$(PROGRAM)"
 	cp $(PROGRAM) "$(DESTDIRB)bin/"
 	chmod 777 "$(DESTDIRB)bin/$(PROGRAM)"
 
-.PHONY: test
-test :
-	make -C tests all
-
 .PHONY: version
 version : readme
 	sed -i -e "s/VERSION=.*/VERSION='$(VERSION)'/g" $(PROGRAM)