theoretical task

Alfons.moon

@@ -1,6 +1,7 @@
 tasks:
 	build: =>
-		sh "moon bin/moonbuild.moon -jy"
+		load 'moonbuild'
+		tasks.moonbuild j: true
 	release: =>
 		error "no version provided" unless @v
 		tasks.build!

Build.moon

@@ -16,11 +16,6 @@ with public default target 'all'
 	\after 'bin'
 	\after 'lib'
 
-with public target 'install'
-	\depends 'out/moonbuild'
-	\produces '/usr/local/bin/moonbuild'
-	\fn => _.cmd 'sudo', 'cp', @infile, @outfile
-
 with public target 'clean'
 	\fn => _.cmd RM, LIB_LUA
 	\fn => _.cmd RM, BIN_LUA

Makefile

@@ -16,9 +16,6 @@ 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)

bin/task.moon

@@ -0,0 +1,24 @@
+-- load everything we need
+import loadfile from require 'moonscript.base'
+Context = require 'moonbuild.context'
+DepGraph = require 'moonbuild.core.DAG'
+
+tasks:
+	moonbuild: =>
+		args = {
+			nparallel: @parallel or @j
+			quiet: @quiet or @q
+			buildfile: @buildfile or @b
+			force: @force or @f
+		}
+		ctx = Context!
+		ctx\load (loadfile args.buildfile or 'Build.moon'), @
+		ctx\init!
+		dag = DepGraph ctx, #@ == 0 and ctx.defaulttargets or @
+		executor = do
+			Executor = do
+				ok, Executor = pcall -> require 'moonbuild.core.multiprocessexecutor'
+				ok and Executor or require 'moonbuild.core.singleprocessexecutor'
+			args.nparallel = Executor\getmaxparallel! if args.nparallel == true
+			Executor dag, args.nparallel
+		executor\execute args

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) => (path, cflags) -> _cdeps cc, cflags, path
-	__call: (path, cflags) => _cdeps 'cc', cflags, path
+	__index: (cc) => (cflags, path) -> _cdeps cc, cflags, path
+	__call: (cflags, path) => _cdeps 'cc', cflags, path
 
 readfile = (filename) ->
 	fd, err = open filename, 'rb'

moonbuild/core/DAG.moon

@@ -1,4 +1,4 @@
-import first, filter, foreach, flatten, patsubst from require 'moonbuild._common'
+import filter, foreach, flatten, patsubst 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'
@@ -12,8 +12,6 @@ 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'
@@ -22,10 +20,6 @@ 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
 
@@ -34,7 +28,6 @@ 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
@@ -71,7 +64,7 @@ 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}: #{#candidates} candidates, #{#resolved} resolved"
+		resolved[1] or error "Cannot resolve target #{name}"
 
 	buildablenodes: =>
 		[v for k, v in pairs @nodes when v\canbuild! and not v.built]
@@ -94,24 +87,16 @@ class DepNode
 			ctx = setmetatable {},
 				__index: (_, k) ->
 					switch 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}"
+						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}"
 				__newindex: (k) =>
 					error "Attempt to set field #{k} of TargetDepsContext"
 			for depfn in *target.depfunctions
-				deps = flatten deps, foreach (runwithcontext depfn, @dag.env, ctx), resolve
+				deps = flatten deps, foreach depfn, (fn) -> resolve runwithcontext fn, @dag.env, ctx
 		@ins = foreach deps, (dep) -> dep.name
 		@after = foreach after, (dep) -> dep.name
 		@deps = flatten { deps, after }
@@ -123,7 +108,7 @@ class DepNode
 				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. Did you mean to use after instead of depends?"
+				error "Node #{name} has ran all of its parents, but can't run since #{file} doesn't exist"
 		return true
 
 	build: (opts={}) =>

moonbuild/core/multiprocessexecutor.moon

@@ -37,14 +37,6 @@ class Executor
 			error "Node #{name} wasn't built" unless node.built
 
 	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

out/moonbuild

@@ -1272,11 +1272,11 @@ _cdeps = function(cc, cflags, path)
 end
 local cdeps = setmetatable({ }, {
   __index = function(self, cc)
-    return function(path, cflags)
+    return function(cflags, path)
       return _cdeps(cc, cflags, path)
     end
   end,
-  __call = function(self, path, cflags)
+  __call = function(self, cflags, path)
     return _cdeps('cc', cflags, path)
   end
 })
@@ -1646,10 +1646,10 @@ end
 do
 local _ENV = _ENV
 package.preload[ "moonbuild.core.DAG" ] = function( ... ) local arg = _G.arg;
-local first, filter, foreach, flatten, patsubst
+local filter, foreach, flatten, patsubst
 do
   local _obj_0 = require('moonbuild._common')
-  first, filter, foreach, flatten, patsubst = _obj_0.first, _obj_0.filter, _obj_0.foreach, _obj_0.flatten, _obj_0.patsubst
+  filter, foreach, flatten, patsubst = _obj_0.filter, _obj_0.foreach, _obj_0.flatten, _obj_0.patsubst
 end
 local runwithcontext
 runwithcontext = require('moonbuild.compat.ctx').runwithcontext
@@ -1670,8 +1670,6 @@ 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
@@ -1680,10 +1678,6 @@ 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
@@ -1695,9 +1689,6 @@ 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]
@@ -1762,7 +1753,7 @@ do
         return node.a[2]
       end)
       sort(resolved, nodepriority)
-      return resolved[1] or error("Cannot resolve target " .. tostring(name) .. ": " .. tostring(#candidates) .. " candidates, " .. tostring(#resolved) .. " resolved")
+      return resolved[1] or error("Cannot resolve target " .. tostring(name))
     end,
     buildablenodes = function(self)
       local _accum_0 = { }
@@ -1821,7 +1812,7 @@ do
       for _index_0 = 1, #_list_1 do
         local file = _list_1[_index_0]
         if not exists(file) then
-          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?")
+          error("Node " .. tostring(name) .. " has ran all of its parents, but can't run since " .. tostring(file) .. " doesn't exist")
         end
       end
       return true
@@ -1945,19 +1936,13 @@ do
           __index = function(_, k)
             local _exp_0 = k
             if 'infile' == _exp_0 then
-              local f = first(deps)
-              return f and f.name
+              return first(deps)
             elseif 'infiles' == _exp_0 then
-              return foreach(deps, function(self)
-                return self.name
-              end)
+              return flatten(deps)
             elseif 'outfile' == _exp_0 then
-              local f = first(self.outs)
-              return f and f.name
+              return first(self.outs)
             elseif 'outfiles' == _exp_0 then
-              return foreach(self.outs, function(self)
-                return self.name
-              end)
+              return flatten(self.outs)
             elseif 'name' == _exp_0 then
               return self.name
             else
@@ -1971,7 +1956,9 @@ do
         local _list_0 = target.depfunctions
         for _index_0 = 1, #_list_0 do
           local depfn = _list_0[_index_0]
-          deps = flatten(deps, foreach((runwithcontext(depfn, self.dag.env, ctx)), resolve))
+          deps = flatten(deps, foreach(depfn, function(fn)
+            return resolve(runwithcontext(fn, self.dag.env, ctx))
+          end))
         end
       end
       self.ins = foreach(deps, function(dep)
@@ -2257,15 +2244,6 @@ do
       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")

rockspecs/moonbuild-2.1.0-1.rockspec

@@ -1,24 +0,0 @@
-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

@@ -1,24 +0,0 @@
-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

@@ -1,24 +0,0 @@
-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

@@ -1,24 +0,0 @@
-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

@@ -1,24 +0,0 @@
-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

@@ -1,24 +0,0 @@
-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

@@ -1,24 +0,0 @@
-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"