fix gitignore

.gitignore

@@ -1 +1,3 @@
-*.lua
+bin/*.lua
+moonbuild/*.lua
+moonbuild/*/*.lua

Alfons.moon

@@ -1,7 +1,13 @@
 tasks:
-	build: =>
-		sh "moon bin/moonbuild.moon -jy"
+	bootstrap: => sh "moon bin/moonbuild.moon -jy"
+	bootstrapinstall: => sh "moon bin/moonbuild.moon install -jy"
+
 	release: =>
 		error "no version provided" unless @v
 		tasks.build!
 		sh "rockbuild -m -t #{@v} upload"
+
+	build: => (require 'moonbuild') j: true
+	install: => (require 'moonbuild') 'install', j: true
+	clean: => (require 'moonbuild') 'clean'
+	mrproper: => (require 'moonbuild') 'mrproper'

Build.moon

@@ -16,6 +16,22 @@ with public default target 'all'
 	\after 'bin'
 	\after 'lib'
 
+with public target 'install'
+	\after 'install-bin'
+	\after 'install-lib'
+
+with public target 'install-bin'
+	\depends 'out/moonbuild'
+	\produces '/usr/local/bin/moonbuild'
+	\fn => _.cmd 'sudo', 'cp', @infile, @outfile
+	\sync!
+
+with public target 'install-lib'
+	\depends 'out/moonbuild.lua'
+	\produces "/usr/local/share/lua/#{LUA\gsub 'lua', ''}/moonbuild.lua"
+	\fn => _.cmd 'sudo', 'cp', @infile, @outfile
+	\sync!
+
 with public target 'clean'
 	\fn => _.cmd RM, LIB_LUA
 	\fn => _.cmd RM, BIN_LUA
@@ -40,6 +56,13 @@ with target BIN, pattern: 'out/%'
 		_.writefile @outfile, "#!/usr/bin/env #{LUA}\n#{_.readfile @outfile}"
 		_.cmd 'chmod', '+x', @outfile
 
+with target 'out/moonbuild.lua'
+	\depends 'moonbuild/init.lua'
+	\depends LIB_LUA
+	\produces '%'
+	\fn =>
+		_.cmd AMALG, '-o', @outfile, '-s', @infile, _.exclude MODULES, 'moonbuild.init'
+
 with target {LIB_LUA, BIN_LUA}, pattern: '%.lua'
 	\depends '%.moon'
 	\produces '%.lua'

Makefile

@@ -16,6 +16,9 @@ MODULES = $(shell echo $(foreach lib, $(LIB_LUA), $(patsubst %.lua, %, $(lib)))
 
 all: bin lib
 
+install: all
+	sudo cp out/moonbuild /usr/local/bin/moonbuild
+
 clean:
 	$(RM) $(LIB_LUA)
 	$(RM) $(BIN_LUA)

README.md

@@ -24,11 +24,8 @@ You will need `argparse` and `moonscript` installed from luarocks, and `luaposix
 
 ### Bootstrapping
 You can build moonbuild with itself: `moon bin/moonbuild.moon -qjy`.  
-This will leave the binary ready to be used as `out/moonbuild`.
-
-### Using make
-You can also build moonbuild with make: `make`.
-This will leave the binary ready to be used as `out/moonbuild`.
+This will leave the binary ready to be used as `out/moonbuild`.  
+The binary and library can then be installed with `bin/moonbuild install`.
 
 ## Docs
 TODO

bin/moonbuild.moon

@@ -3,6 +3,7 @@ import loadfile from require 'moonscript.base'
 Context = require 'moonbuild.context'
 Variable = require 'moonbuild.core.Variable'
 DepGraph = require 'moonbuild.core.DAG'
+Executor = require 'moonbuild.core.executor'
 import parseargs from require 'moonbuild._cmd.common'
 import sort, concat from table
 import exit from os
@@ -74,15 +75,8 @@ dag = DepGraph ctx, targets
 print "Created dependancy graph" if args.verbose
 
 -- execute the build
-if args.parallel==1
-	Executor = require 'moonbuild.core.singleprocessexecutor'
-	executor = Executor dag, args.parallel
-	executor\execute args
-else
-	ok, Executor = pcall -> require 'moonbuild.core.multiprocessexecutor'
-	Executor = require 'moonbuild.core.singleprocessexecutor' unless ok
-	nparallel = args.parallel == 'y' and Executor\getmaxparallel! or args.parallel
-	print "Building with #{nparallel} max parallel process#{nparallel>1 and "es" or ""}" if args.verbose
-	executor = Executor dag, nparallel
-	executor\execute args
+nparallel = args.parallel == 'y' and Executor\getmaxparallel! or args.parallel
+print "Building with #{nparallel} max parallel process#{nparallel>1 and "es" or ""}" if args.verbose
+executor = Executor dag, nparallel
+executor\execute args
 print "Finished" if args.verbose

moonbuild/_common.moon

@@ -155,6 +155,7 @@ common.includes = includes
 common.patget = patget
 common.patset = patset
 common.patsubst = patsubst
+common.exclude = exclude
 common.min = min
 common.max = max
 common.minmax = minmax

moonbuild/_util.moon

@@ -14,8 +14,8 @@ _cdeps = (cc, cflags, path) ->
 	rawlist = gsub (match raw, ':(.+)'), '\\\n', ' '
 	[v for v in gmatch rawlist, '%S+']
 cdeps = setmetatable {},
-	__index: (cc) => (cflags, path) -> _cdeps cc, cflags, path
-	__call: (cflags, path) => _cdeps 'cc', cflags, path
+	__index: (cc) => (path, cflags) -> _cdeps cc, cflags, path
+	__call: (path, cflags) => _cdeps 'cc', cflags, path
 
 readfile = (filename) ->
 	fd, err = open filename, 'rb'

moonbuild/core/DAG.moon

@@ -1,8 +1,8 @@
-import filter, foreach, flatten, patsubst from require 'moonbuild._common'
+import first, filter, foreach, flatten, patsubst, includes from require 'moonbuild._common'
 import runwithcontext from require 'moonbuild.compat.ctx'
 globalenv = require 'moonbuild.env.global'
 import exists, parent, mkdirs, clearentry, disableentry, attributes from require 'moonbuild._fs'
-import sort from table
+import sort, insert, remove from table
 import huge from math
 
 local DepNode, FileTarget
@@ -12,6 +12,8 @@ nodepriority = (a, b) ->
 	tb = type b.name
 	da = #a.deps
 	db = #b.deps
+	sa = a.sync
+	sb = b.sync
 	if ta=='string' and tb!='string'
 		return true
 	elseif ta!='string' and tb=='string'
@@ -20,6 +22,10 @@ nodepriority = (a, b) ->
 		return true
 	elseif a.priority < b.priority
 		return false
+	elseif sa and not sb
+		return false
+	elseif sb and not sa
+		return true
 	else
 		return da < db
 
@@ -28,6 +34,7 @@ transclosure = (obj, prop) ->
 	i = 1
 	set = {}
 	imp = (e) ->
+		return unless e[prop]
 		for v in *e[prop]
 			if not set[v]
 				elems[i], i = v, i+1
@@ -64,11 +71,25 @@ class DepGraph
 		nodes = foreach candidates, (candidate) -> a: {pcall -> DepNode @, candidate, name}
 		resolved = foreach (filter nodes, (node) -> node.a[1]), (node) -> node.a[2]
 		sort resolved, nodepriority
-		resolved[1] or error "Cannot resolve target #{name}"
+		resolved[1] or error "Cannot resolve target #{name}: #{#candidates} candidates, #{#resolved} resolved"
 
 	buildablenodes: =>
 		[v for k, v in pairs @nodes when v\canbuild! and not v.built]
 
+	reset: =>
+		n.built = false for k, n in pairs @nodes
+
+	resetchildren: (names) =>
+		done = {}
+		stack = [v for v in *names]
+		while #stack != 0
+			name = remove stack
+			continue if done[name]
+			done[name] = true
+			node = @nodes[name]
+			node.built = false
+			insert stack, n for n in *(node\children!)
+
 class DepNode
 	new: (@dag, target, @name) =>
 		@priority = target.priority
@@ -87,38 +108,50 @@ class DepNode
 			ctx = setmetatable {},
 				__index: (_, k) ->
 					switch k
-						when 'infile' then first deps
-						when 'infiles' then flatten deps
-						when 'outfile' then first @outs
-						when 'outfiles' then flatten @outs
-						when 'name' then @name
-						else error "No such field in TargetDepsContext: #{k}"
+						when 'infile'
+							f = first deps
+							f and f.name
+						when 'infiles'
+							foreach deps, => @name
+						when 'outfile'
+							f = first @outs
+							f and f.name
+						when 'outfiles'
+							foreach @outs, => @name
+						when 'name'
+							@name
+						else
+							error "No such field in TargetDepsContext: #{k}"
 				__newindex: (k) =>
 					error "Attempt to set field #{k} of TargetDepsContext"
 			for depfn in *target.depfunctions
-				deps = flatten deps, foreach depfn, (fn) -> resolve runwithcontext fn, @dag.env, ctx
+				deps = flatten deps, foreach (runwithcontext depfn, @dag.env, ctx), resolve
 		@ins = foreach deps, (dep) -> dep.name
 		@after = foreach after, (dep) -> dep.name
 		@deps = flatten { deps, after }
 		@built = true if #@deps == 0 and #@buildfunctions == 0
 
+	children: =>
+		[k for k, n in pairs @dag.nodes when (includes n.ins, @name) or (includes n.after, @name)]
+
 	canbuild: =>
 		for node in *flatten { @ins, @after }
 			if not @dag.nodes[node].built
 				return false
 		for file in *@ins
 			if not exists file
-				error "Node #{name} has ran all of its parents, but can't run since #{file} doesn't exist"
+				error "Node #{@name} has ran all of its parents, but can't run since #{file} doesn't exist. Did you mean to use after instead of depends?"
 		return true
 
 	build: (opts={}) =>
 		force = opts.force or false
 		quiet = opts.quiet or false
 
-		return if @built
-		return unless force or @shouldbuild!
-		print "#{@type == 'virtual' and "Running" or "Building"} #{@name}" unless quiet or #@buildfunctions == 0
+		return false if @built or #@buildfunctions == 0
+		return false unless force or @shouldbuild!
+		print "#{@type == 'virtual' and "Running" or "Building"} #{@name}" unless quiet
 		@actuallybuild!
+		true
 
 
 	shouldbuild: =>

moonbuild/core/executor.moon

@@ -0,0 +1,2 @@
+ok, MultiProcessExecutor = pcall -> require 'moonbuild.core.multiprocessexecutor'
+ok and MultiProcessExecutor or require 'moonbuild.core.singleprocessexecutor'

moonbuild/core/multiprocessexecutor.moon

@@ -1,3 +1,4 @@
+SingleProcessExecutor = require 'moonbuild.core.singleprocessexecutor'
 import fork, _exit from require 'posix.unistd'
 import wait from require 'posix.sys.wait'
 import open, stderr from io
@@ -17,8 +18,12 @@ class Executor
 		@processes = {}
 		@nprocesses = 0
 		@building = {}
+		@nbuilt = 0
 
 	execute: (opts) =>
+		if @nparallel == 1
+			return (SingleProcessExecutor @dag, 1)\execute opts
+
 		block = @dag\buildablenodes!
 		while #block != 0
 			for node in *block
@@ -36,7 +41,21 @@ class Executor
 		for name, node in pairs @dag.nodes
 			error "Node #{name} wasn't built" unless node.built
 
+		unless opts.quiet
+			if @nbuilt == 0
+				print "Nothing to be done"
+			else
+				print "Built #{@nbuilt} targets"
+
 	addprocess: (node, opts) =>
+		if node.sync
+			while @nprocesses != 0
+				@waitprocess!
+			node\build opts
+			node.built = true
+			node\updatecache!
+			return
+
 		pid = fork!
 		error "Failed to fork" unless pid
 		if pid!=0
@@ -44,18 +63,20 @@ class Executor
 			@nprocesses += 1
 			@building[node] = true
 		else
-			ok, err = pcall -> node\build opts
+			ok, status = pcall -> node\build opts
 			if ok
+				_exit status and 0 or 2
 				_exit 0
 			else
-				stderr\write err
+				stderr\write status
 				_exit 1
 
 	waitprocess: =>
 		pid, ty, status = wait!
 		error "Failed to wait" unless pid
-		error "Failed to build #{@processes[pid].name}" if ty != 'exited' or status != 0
+		error "Failed to build #{@processes[pid].name}" if ty != 'exited' or status != 0 and status != 2
 		@processes[pid].built = true
 		@processes[pid]\updatecache!
 		@processes[pid] = nil
 		@nprocesses -= 1
+		@nbuilt += 1 if status == 0

moonbuild/core/singleprocessexecutor.moon

@@ -4,13 +4,21 @@ class Executor
 	new: (@dag, @nparallel) =>
 
 	execute: (opts) =>
+		nbuilt = 0
+
 		block = @dag\buildablenodes!
 		while #block != 0
 			for node in *block
-				node\build opts
+				nbuilt +=1 if node\build opts
 				node\updatecache!
 				node.built = true
 			block = @dag\buildablenodes!
 
 		for name, node in pairs @dag.nodes
 			error "Node #{name} wasn't built" unless node.built
+
+		unless opts.quiet
+			if nbuilt == 0
+				print "Nothing to be done"
+			else
+				print "Built #{nbuilt} targets"

moonbuild/init.moon

@@ -0,0 +1,60 @@
+import loadfile from require 'moonscript.base'
+Context = require 'moonbuild.context'
+DepGraph = require 'moonbuild.core.DAG'
+Executor = require 'moonbuild.core.executor'
+_ = require 'moonbuild._'
+import insert from table
+
+moonbuild = (...) ->
+	-- build argument table
+	opts = {}
+	for i=1, select '#', ...
+		arg = select i, ...
+		if (type arg) == 'string'
+			insert opts, arg
+		elseif (type arg) == 'table'
+			for k, v in pairs arg
+				opts[k] = v if (type k) != 'number'
+			for i, v in ipairs arg
+				insert opts, v
+		else
+			error "Invalid argument type #{type arg} for moonbuild"
+
+	-- resolve arguments
+	buildfile = opts.buildfile or opts.b or 'Build.moon'
+	opts.buildfile = buildfile
+	parallel = opts.parallel or opts.j or 1
+	parallel = true if parallel == 'y'
+	opts.parallel = parallel
+	quiet = opts.quiet or opts.q or false
+	opts.quiet = quiet
+	force = opts.force or opts.f or false
+	opts.force = force
+	verbose = opts.verbose or opts.v or false
+	opts.verbose = verbose
+
+	-- create context and DAG
+	ctx = Context!
+	ctx\load (loadfile buildfile), opts
+	print "Loaded buildfile" if verbose
+	ctx\init!
+	print "Initialized buildfile" if verbose
+	targets = #opts==0 and ctx.defaulttargets or opts
+	dag = DepGraph ctx, targets
+	print "Created dependancy graph" if verbose
+
+	-- and build
+	nparallel = parallel == true and Executor\getmaxparallel! or parallel
+	print "Building with #{nparallel} max parallel process#{nparallel>1 and "es" or ""}" if verbose
+	executor = Executor dag, nparallel
+	executor\execute opts
+	print "Finished" if verbose
+
+table = {
+	:moonbuild, :_
+	:Context, :DepGraph, :Executor
+}
+
+setmetatable table,
+	__call: (...) => moonbuild ...
+	__index: (name) => require "moonbuild.#{name}"

out/moonbuild

@@ -636,6 +636,7 @@ common.includes = includes
 common.patget = patget
 common.patset = patset
 common.patsubst = patsubst
+common.exclude = exclude
 common.min = min
 common.max = max
 common.minmax = minmax
@@ -1272,11 +1273,11 @@ _cdeps = function(cc, cflags, path)
 end
 local cdeps = setmetatable({ }, {
   __index = function(self, cc)
-    return function(cflags, path)
+    return function(path, cflags)
       return _cdeps(cc, cflags, path)
     end
   end,
-  __call = function(self, cflags, path)
+  __call = function(self, path, cflags)
     return _cdeps('cc', cflags, path)
   end
 })
@@ -1646,10 +1647,10 @@ end
 do
 local _ENV = _ENV
 package.preload[ "moonbuild.core.DAG" ] = function( ... ) local arg = _G.arg;
-local filter, foreach, flatten, patsubst
+local first, filter, foreach, flatten, patsubst, includes
 do
   local _obj_0 = require('moonbuild._common')
-  filter, foreach, flatten, patsubst = _obj_0.filter, _obj_0.foreach, _obj_0.flatten, _obj_0.patsubst
+  first, filter, foreach, flatten, patsubst, includes = _obj_0.first, _obj_0.filter, _obj_0.foreach, _obj_0.flatten, _obj_0.patsubst, _obj_0.includes
 end
 local runwithcontext
 runwithcontext = require('moonbuild.compat.ctx').runwithcontext
@@ -1659,8 +1660,11 @@ do
   local _obj_0 = require('moonbuild._fs')
   exists, parent, mkdirs, clearentry, disableentry, attributes = _obj_0.exists, _obj_0.parent, _obj_0.mkdirs, _obj_0.clearentry, _obj_0.disableentry, _obj_0.attributes
 end
-local sort
-sort = table.sort
+local sort, insert, remove
+do
+  local _obj_0 = table
+  sort, insert, remove = _obj_0.sort, _obj_0.insert, _obj_0.remove
+end
 local huge
 huge = math.huge
 local DepNode, FileTarget
@@ -1670,6 +1674,8 @@ nodepriority = function(a, b)
   local tb = type(b.name)
   local da = #a.deps
   local db = #b.deps
+  local sa = a.sync
+  local sb = b.sync
   if ta == 'string' and tb ~= 'string' then
     return true
   elseif ta ~= 'string' and tb == 'string' then
@@ -1678,6 +1684,10 @@ nodepriority = function(a, b)
     return true
   elseif a.priority < b.priority then
     return false
+  elseif sa and not sb then
+    return false
+  elseif sb and not sa then
+    return true
   else
     return da < db
   end
@@ -1689,6 +1699,9 @@ transclosure = function(obj, prop)
   local set = { }
   local imp
   imp = function(e)
+    if not (e[prop]) then
+      return 
+    end
     local _list_0 = e[prop]
     for _index_0 = 1, #_list_0 do
       local v = _list_0[_index_0]
@@ -1753,7 +1766,7 @@ do
         return node.a[2]
       end)
       sort(resolved, nodepriority)
-      return resolved[1] or error("Cannot resolve target " .. tostring(name))
+      return resolved[1] or error("Cannot resolve target " .. tostring(name) .. ": " .. tostring(#candidates) .. " candidates, " .. tostring(#resolved) .. " resolved")
     end,
     buildablenodes = function(self)
       local _accum_0 = { }
@@ -1765,6 +1778,47 @@ do
         end
       end
       return _accum_0
+    end,
+    reset = function(self)
+      for k, n in pairs(self.nodes) do
+        n.built = false
+      end
+    end,
+    resetchildren = function(self, names)
+      local done = { }
+      local stack
+      do
+        local _accum_0 = { }
+        local _len_0 = 1
+        for _index_0 = 1, #names do
+          local v = names[_index_0]
+          _accum_0[_len_0] = v
+          _len_0 = _len_0 + 1
+        end
+        stack = _accum_0
+      end
+      while #stack ~= 0 do
+        local _continue_0 = false
+        repeat
+          local name = remove(stack)
+          if done[name] then
+            _continue_0 = true
+            break
+          end
+          done[name] = true
+          local node = self.nodes[name]
+          node.built = false
+          local _list_0 = (node:children())
+          for _index_0 = 1, #_list_0 do
+            local n = _list_0[_index_0]
+            insert(stack, n)
+          end
+          _continue_0 = true
+        until true
+        if not _continue_0 then
+          break
+        end
+      end
     end
   }
   _base_0.__index = _base_0
@@ -1797,6 +1851,17 @@ end
 do
   local _class_0
   local _base_0 = {
+    children = function(self)
+      local _accum_0 = { }
+      local _len_0 = 1
+      for k, n in pairs(self.dag.nodes) do
+        if (includes(n.ins, self.name)) or (includes(n.after, self.name)) then
+          _accum_0[_len_0] = k
+          _len_0 = _len_0 + 1
+        end
+      end
+      return _accum_0
+    end,
     canbuild = function(self)
       local _list_0 = flatten({
         self.ins,
@@ -1812,7 +1877,7 @@ do
       for _index_0 = 1, #_list_1 do
         local file = _list_1[_index_0]
         if not exists(file) then
-          error("Node " .. tostring(name) .. " has ran all of its parents, but can't run since " .. tostring(file) .. " doesn't exist")
+          error("Node " .. tostring(self.name) .. " has ran all of its parents, but can't run since " .. tostring(file) .. " doesn't exist. Did you mean to use after instead of depends?")
         end
       end
       return true
@@ -1823,16 +1888,17 @@ do
       end
       local force = opts.force or false
       local quiet = opts.quiet or false
-      if self.built then
-        return 
+      if self.built or #self.buildfunctions == 0 then
+        return false
       end
       if not (force or self:shouldbuild()) then
-        return 
+        return false
       end
-      if not (quiet or #self.buildfunctions == 0) then
+      if not (quiet) then
         print(tostring(self.type == 'virtual' and "Running" or "Building") .. " " .. tostring(self.name))
       end
-      return self:actuallybuild()
+      self:actuallybuild()
+      return true
     end,
     shouldbuild = function(self)
       if #self.outs == 0 or #self.ins == 0 or self.type == 'virtual' then
@@ -1936,13 +2002,19 @@ do
           __index = function(_, k)
             local _exp_0 = k
             if 'infile' == _exp_0 then
-              return first(deps)
+              local f = first(deps)
+              return f and f.name
             elseif 'infiles' == _exp_0 then
-              return flatten(deps)
+              return foreach(deps, function(self)
+                return self.name
+              end)
             elseif 'outfile' == _exp_0 then
-              return first(self.outs)
+              local f = first(self.outs)
+              return f and f.name
             elseif 'outfiles' == _exp_0 then
-              return flatten(self.outs)
+              return foreach(self.outs, function(self)
+                return self.name
+              end)
             elseif 'name' == _exp_0 then
               return self.name
             else
@@ -1956,9 +2028,7 @@ do
         local _list_0 = target.depfunctions
         for _index_0 = 1, #_list_0 do
           local depfn = _list_0[_index_0]
-          deps = flatten(deps, foreach(depfn, function(fn)
-            return resolve(runwithcontext(fn, self.dag.env, ctx))
-          end))
+          deps = flatten(deps, foreach((runwithcontext(depfn, self.dag.env, ctx)), resolve))
         end
       end
       self.ins = foreach(deps, function(dep)
@@ -2173,9 +2243,20 @@ end
 end
 end
 
+do
+local _ENV = _ENV
+package.preload[ "moonbuild.core.executor" ] = function( ... ) local arg = _G.arg;
+local ok, MultiProcessExecutor = pcall(function()
+  return require('moonbuild.core.multiprocessexecutor')
+end)
+return ok and MultiProcessExecutor or require('moonbuild.core.singleprocessexecutor')
+end
+end
+
 do
 local _ENV = _ENV
 package.preload[ "moonbuild.core.multiprocessexecutor" ] = function( ... ) local arg = _G.arg;
+local SingleProcessExecutor = require('moonbuild.core.singleprocessexecutor')
 local fork, _exit
 do
   local _obj_0 = require('posix.unistd')
@@ -2195,6 +2276,9 @@ do
   local _class_0
   local _base_0 = {
     execute = function(self, opts)
+      if self.nparallel == 1 then
+        return (SingleProcessExecutor(self.dag, 1)):execute(opts)
+      end
       local block = self.dag:buildablenodes()
       while #block ~= 0 do
         for _index_0 = 1, #block do
@@ -2242,8 +2326,24 @@ do
           error("Node " .. tostring(name) .. " wasn't built")
         end
       end
+      if not (opts.quiet) then
+        if self.nbuilt == 0 then
+          return print("Nothing to be done")
+        else
+          return print("Built " .. tostring(self.nbuilt) .. " targets")
+        end
+      end
     end,
     addprocess = function(self, node, opts)
+      if node.sync then
+        while self.nprocesses ~= 0 do
+          self:waitprocess()
+        end
+        node:build(opts)
+        node.built = true
+        node:updatecache()
+        return 
+      end
       local pid = fork()
       if not (pid) then
         error("Failed to fork")
@@ -2253,13 +2353,14 @@ do
         self.nprocesses = self.nprocesses + 1
         self.building[node] = true
       else
-        local ok, err = pcall(function()
+        local ok, status = pcall(function()
           return node:build(opts)
         end)
         if ok then
+          _exit(status and 0 or 2)
           return _exit(0)
         else
-          stderr:write(err)
+          stderr:write(status)
           return _exit(1)
         end
       end
@@ -2269,13 +2370,16 @@ do
       if not (pid) then
         error("Failed to wait")
       end
-      if ty ~= 'exited' or status ~= 0 then
+      if ty ~= 'exited' or status ~= 0 and status ~= 2 then
         error("Failed to build " .. tostring(self.processes[pid].name))
       end
       self.processes[pid].built = true
       self.processes[pid]:updatecache()
       self.processes[pid] = nil
       self.nprocesses = self.nprocesses - 1
+      if status == 0 then
+        self.nbuilt = self.nbuilt + 1
+      end
     end
   }
   _base_0.__index = _base_0
@@ -2285,6 +2389,7 @@ do
       self.processes = { }
       self.nprocesses = 0
       self.building = { }
+      self.nbuilt = 0
     end,
     __base = _base_0,
     __name = "Executor"
@@ -2326,11 +2431,14 @@ do
   local _class_0
   local _base_0 = {
     execute = function(self, opts)
+      local nbuilt = 0
       local block = self.dag:buildablenodes()
       while #block ~= 0 do
         for _index_0 = 1, #block do
           local node = block[_index_0]
-          node:build(opts)
+          if node:build(opts) then
+            nbuilt = nbuilt + 1
+          end
           node:updatecache()
           node.built = true
         end
@@ -2341,6 +2449,13 @@ do
           error("Node " .. tostring(name) .. " wasn't built")
         end
       end
+      if not (opts.quiet) then
+        if nbuilt == 0 then
+          return print("Nothing to be done")
+        else
+          return print("Built " .. tostring(nbuilt) .. " targets")
+        end
+      end
     end
   }
   _base_0.__index = _base_0
@@ -2476,6 +2591,92 @@ end
 end
 end
 
+do
+local _ENV = _ENV
+package.preload[ "moonbuild.init" ] = function( ... ) local arg = _G.arg;
+local loadfile
+loadfile = require('moonscript.base').loadfile
+local Context = require('moonbuild.context')
+local DepGraph = require('moonbuild.core.DAG')
+local Executor = require('moonbuild.core.executor')
+local _ = require('moonbuild._')
+local insert
+insert = table.insert
+local moonbuild
+moonbuild = function(...)
+  local opts = { }
+  for i = 1, select('#', ...) do
+    local arg = select(i, ...)
+    if (type(arg)) == 'string' then
+      insert(opts, arg)
+    elseif (type(arg)) == 'table' then
+      for k, v in pairs(arg) do
+        if (type(k)) ~= 'number' then
+          opts[k] = v
+        end
+      end
+      for i, v in ipairs(arg) do
+        insert(opts, v)
+      end
+    else
+      error("Invalid argument type " .. tostring(type(arg)) .. " for moonbuild")
+    end
+  end
+  local buildfile = opts.buildfile or opts.b or 'Build.moon'
+  opts.buildfile = buildfile
+  local parallel = opts.parallel or opts.j or 1
+  if parallel == 'y' then
+    parallel = true
+  end
+  opts.parallel = parallel
+  local quiet = opts.quiet or opts.q or false
+  opts.quiet = quiet
+  local force = opts.force or opts.f or false
+  opts.force = force
+  local verbose = opts.verbose or opts.v or false
+  opts.verbose = verbose
+  local ctx = Context()
+  ctx:load((loadfile(buildfile)), opts)
+  if verbose then
+    print("Loaded buildfile")
+  end
+  ctx:init()
+  if verbose then
+    print("Initialized buildfile")
+  end
+  local targets = #opts == 0 and ctx.defaulttargets or opts
+  local dag = DepGraph(ctx, targets)
+  if verbose then
+    print("Created dependancy graph")
+  end
+  local nparallel = parallel == true and Executor:getmaxparallel() or parallel
+  if verbose then
+    print("Building with " .. tostring(nparallel) .. " max parallel process" .. tostring(nparallel > 1 and "es" or ""))
+  end
+  local executor = Executor(dag, nparallel)
+  executor:execute(opts)
+  if verbose then
+    return print("Finished")
+  end
+end
+local table = {
+  moonbuild = moonbuild,
+  _ = _,
+  Context = Context,
+  DepGraph = DepGraph,
+  Executor = Executor
+}
+return setmetatable(table, {
+  __call = function(self, ...)
+    return moonbuild(...)
+  end,
+  __index = function(self, name)
+    return require("moonbuild." .. tostring(name))
+  end
+})
+end
+end
+
 end
 
 local loadfile
@@ -2483,6 +2684,7 @@ loadfile = require('moonscript.base').loadfile
 local Context = require('moonbuild.context')
 local Variable = require('moonbuild.core.Variable')
 local DepGraph = require('moonbuild.core.DAG')
+local Executor = require('moonbuild.core.executor')
 local parseargs
 parseargs = require('moonbuild._cmd.common').parseargs
 local sort, concat
@@ -2578,24 +2780,12 @@ local dag = DepGraph(ctx, targets)
 if args.verbose then
   print("Created dependancy graph")
 end
-if args.parallel == 1 then
-  local Executor = require('moonbuild.core.singleprocessexecutor')
-  local executor = Executor(dag, args.parallel)
-  executor:execute(args)
-else
-  local ok, Executor = pcall(function()
-    return require('moonbuild.core.multiprocessexecutor')
-  end)
-  if not (ok) then
-    Executor = require('moonbuild.core.singleprocessexecutor')
-  end
-  local nparallel = args.parallel == 'y' and Executor:getmaxparallel() or args.parallel
-  if args.verbose then
-    print("Building with " .. tostring(nparallel) .. " max parallel process" .. tostring(nparallel > 1 and "es" or ""))
-  end
-  local executor = Executor(dag, nparallel)
-  executor:execute(args)
+local nparallel = args.parallel == 'y' and Executor:getmaxparallel() or args.parallel
+if args.verbose then
+  print("Building with " .. tostring(nparallel) .. " max parallel process" .. tostring(nparallel > 1 and "es" or ""))
 end
+local executor = Executor(dag, nparallel)
+executor:execute(args)
 if args.verbose then
   return print("Finished")
 end

rock.yml

@@ -22,3 +22,5 @@ build:
     install:
         bin:
             moonbuild: out/moonbuild
+    modules:
+        moonbuild: out/moonbuild.lua

rockspecs/moonbuild-2.1.0-1.rockspec

@@ -0,0 +1,24 @@
+build = {
+  install = {
+    bin = {
+      moonbuild = "out/moonbuild"
+    }
+  },
+  type = "builtin"
+}
+dependencies = {
+  "lua >= 5.1",
+  "argparse >= 0.7.1-1",
+  "moonscript >= 0.5.0-1"
+}
+description = {
+  detailed = "moonbuild is a small build system that simplifies your build definitions by allowing you to use declarative as well as imperative rules. It represents the build as a DAG with explicit ordering, and doesn't give you any default confusing rules (unlike make). If you can, installing luaposix and/or luafilesystem will speed up builds and increase stability.\n",
+  summary = "Small build system in between make and a build.sh"
+}
+package = "moonbuild"
+rockspec_format = "3.0"
+source = {
+  tag = "v2.1.0",
+  url = "git://github.com/natnat-mc/moonbuild"
+}
+version = "2.1.0-1"

rockspecs/moonbuild-2.1.0-2.rockspec

@@ -0,0 +1,24 @@
+build = {
+  install = {
+    bin = {
+      moonbuild = "out/moonbuild"
+    }
+  },
+  type = "builtin"
+}
+dependencies = {
+  "lua >= 5.1",
+  "argparse >= 0.7.1-1",
+  "moonscript >= 0.5.0-1"
+}
+description = {
+  detailed = "moonbuild is a small build system that simplifies your build definitions by allowing you to use declarative as well as imperative rules. It represents the build as a DAG with explicit ordering, and doesn't give you any default confusing rules (unlike make). If you can, installing luaposix and/or luafilesystem will speed up builds and increase stability.\n",
+  summary = "Small build system in between make and a build.sh"
+}
+package = "moonbuild"
+rockspec_format = "3.0"
+source = {
+  tag = "v2.1.0",
+  url = "git://github.com/natnat-mc/moonbuild"
+}
+version = "2.1.0-2"

rockspecs/moonbuild-2.1.0-3.rockspec

@@ -0,0 +1,24 @@
+build = {
+  install = {
+    bin = {
+      moonbuild = "out/moonbuild"
+    }
+  },
+  type = "builtin"
+}
+dependencies = {
+  "lua >= 5.1",
+  "argparse >= 0.7.1-1",
+  "moonscript >= 0.5.0-1"
+}
+description = {
+  detailed = "moonbuild is a small build system that simplifies your build definitions by allowing you to use declarative as well as imperative rules. It represents the build as a DAG with explicit ordering, and doesn't give you any default confusing rules (unlike make). If you can, installing luaposix and/or luafilesystem will speed up builds and increase stability.\n",
+  summary = "Small build system in between make and a build.sh"
+}
+package = "moonbuild"
+rockspec_format = "3.0"
+source = {
+  tag = "v2.1.0",
+  url = "git://github.com/natnat-mc/moonbuild"
+}
+version = "2.1.0-3"

rockspecs/moonbuild-2.1.1-1.rockspec

@@ -0,0 +1,24 @@
+build = {
+  install = {
+    bin = {
+      moonbuild = "out/moonbuild"
+    }
+  },
+  type = "builtin"
+}
+dependencies = {
+  "lua >= 5.1",
+  "argparse >= 0.7.1-1",
+  "moonscript >= 0.5.0-1"
+}
+description = {
+  detailed = "moonbuild is a small build system that simplifies your build definitions by allowing you to use declarative as well as imperative rules. It represents the build as a DAG with explicit ordering, and doesn't give you any default confusing rules (unlike make). If you can, installing luaposix and/or luafilesystem will speed up builds and increase stability.\n",
+  summary = "Small build system in between make and a build.sh"
+}
+package = "moonbuild"
+rockspec_format = "3.0"
+source = {
+  tag = "v2.1.1",
+  url = "git://github.com/natnat-mc/moonbuild"
+}
+version = "2.1.1-1"

rockspecs/moonbuild-2.1.2-1.rockspec

@@ -0,0 +1,24 @@
+build = {
+  install = {
+    bin = {
+      moonbuild = "out/moonbuild"
+    }
+  },
+  type = "builtin"
+}
+dependencies = {
+  "lua >= 5.1",
+  "argparse >= 0.7.1-1",
+  "moonscript >= 0.5.0-1"
+}
+description = {
+  detailed = "moonbuild is a small build system that simplifies your build definitions by allowing you to use declarative as well as imperative rules. It represents the build as a DAG with explicit ordering, and doesn't give you any default confusing rules (unlike make). If you can, installing luaposix and/or luafilesystem will speed up builds and increase stability.\n",
+  summary = "Small build system in between make and a build.sh"
+}
+package = "moonbuild"
+rockspec_format = "3.0"
+source = {
+  tag = "v2.1.2",
+  url = "git://github.com/natnat-mc/moonbuild"
+}
+version = "2.1.2-1"

rockspecs/moonbuild-2.1.2-2.rockspec

@@ -0,0 +1,24 @@
+build = {
+  install = {
+    bin = {
+      moonbuild = "out/moonbuild"
+    }
+  },
+  type = "builtin"
+}
+dependencies = {
+  "lua >= 5.1",
+  "argparse >= 0.7.1-1",
+  "moonscript >= 0.5.0-1"
+}
+description = {
+  detailed = "moonbuild is a small build system that simplifies your build definitions by allowing you to use declarative as well as imperative rules. It represents the build as a DAG with explicit ordering, and doesn't give you any default confusing rules (unlike make). If you can, installing luaposix and/or luafilesystem will speed up builds and increase stability.\n",
+  summary = "Small build system in between make and a build.sh"
+}
+package = "moonbuild"
+rockspec_format = "3.0"
+source = {
+  tag = "v2.1.2",
+  url = "git://github.com/natnat-mc/moonbuild"
+}
+version = "2.1.2-2"

rockspecs/moonbuild-2.1.3-1.rockspec

@@ -0,0 +1,24 @@
+build = {
+  install = {
+    bin = {
+      moonbuild = "out/moonbuild"
+    }
+  },
+  type = "builtin"
+}
+dependencies = {
+  "lua >= 5.1",
+  "argparse >= 0.7.1-1",
+  "moonscript >= 0.5.0-1"
+}
+description = {
+  detailed = "moonbuild is a small build system that simplifies your build definitions by allowing you to use declarative as well as imperative rules. It represents the build as a DAG with explicit ordering, and doesn't give you any default confusing rules (unlike make). If you can, installing luaposix and/or luafilesystem will speed up builds and increase stability.\n",
+  summary = "Small build system in between make and a build.sh"
+}
+package = "moonbuild"
+rockspec_format = "3.0"
+source = {
+  tag = "v2.1.3",
+  url = "git://github.com/natnat-mc/moonbuild"
+}
+version = "2.1.3-1"

rockspecs/moonbuild-2.1.3-2.rockspec

@@ -0,0 +1,24 @@
+build = {
+  install = {
+    bin = {
+      moonbuild = "out/moonbuild"
+    }
+  },
+  type = "builtin"
+}
+dependencies = {
+  "lua >= 5.1",
+  "argparse >= 0.7.1-1",
+  "moonscript >= 0.5.0-1"
+}
+description = {
+  detailed = "moonbuild is a small build system that simplifies your build definitions by allowing you to use declarative as well as imperative rules. It represents the build as a DAG with explicit ordering, and doesn't give you any default confusing rules (unlike make). If you can, installing luaposix and/or luafilesystem will speed up builds and increase stability.\n",
+  summary = "Small build system in between make and a build.sh"
+}
+package = "moonbuild"
+rockspec_format = "3.0"
+source = {
+  tag = "v2.1.3",
+  url = "git://github.com/natnat-mc/moonbuild"
+}
+version = "2.1.3-2"

rockspecs/moonbuild-2.2.0-1.rockspec

@@ -0,0 +1,27 @@
+build = {
+  install = {
+    bin = {
+      moonbuild = "out/moonbuild"
+    },
+    modules = {
+      moonbuild = "out/moonbuild.lua"
+    }
+  },
+  type = "builtin"
+}
+dependencies = {
+  "lua >= 5.1",
+  "argparse >= 0.7.1-1",
+  "moonscript >= 0.5.0-1"
+}
+description = {
+  detailed = "moonbuild is a small build system that simplifies your build definitions by allowing you to use declarative as well as imperative rules. It represents the build as a DAG with explicit ordering, and doesn't give you any default confusing rules (unlike make). If you can, installing luaposix and/or luafilesystem will speed up builds and increase stability.\n",
+  summary = "Small build system in between make and a build.sh"
+}
+package = "moonbuild"
+rockspec_format = "3.0"
+source = {
+  tag = "v2.2.0",
+  url = "git://github.com/natnat-mc/moonbuild"
+}
+version = "2.2.0-1"

rockspecs/moonbuild-2.2.0-2.rockspec

@@ -0,0 +1,27 @@
+build = {
+  install = {
+    bin = {
+      moonbuild = "out/moonbuild"
+    }
+  },
+  modules = {
+    moonbuild = "out/moonbuild.lua"
+  },
+  type = "builtin"
+}
+dependencies = {
+  "lua >= 5.1",
+  "argparse >= 0.7.1-1",
+  "moonscript >= 0.5.0-1"
+}
+description = {
+  detailed = "moonbuild is a small build system that simplifies your build definitions by allowing you to use declarative as well as imperative rules. It represents the build as a DAG with explicit ordering, and doesn't give you any default confusing rules (unlike make). If you can, installing luaposix and/or luafilesystem will speed up builds and increase stability.\n",
+  summary = "Small build system in between make and a build.sh"
+}
+package = "moonbuild"
+rockspec_format = "3.0"
+source = {
+  tag = "v2.2.0",
+  url = "git://github.com/natnat-mc/moonbuild"
+}
+version = "2.2.0-2"