v2.3.0

Bumps [redcarpet](https://github.com/vmg/redcarpet) from 3.5.0 to 3.5.1.
- [Release notes](https://github.com/vmg/redcarpet/releases)
- [Changelog](https://github.com/vmg/redcarpet/blob/master/CHANGELOG.md)
- [Commits](https://github.com/vmg/redcarpet/compare/v3.5.0...v3.5.1)

Signed-off-by: dependabot[bot] <support@github.com>

CHANGELOG.md

@@ -1,3 +1,27 @@
+## v2.3.0
+
+### New Features
+
+- #125 - Support subsidiary Rsconscript files
+- #126 - Add PATH manipulation methods
+
+### Fixes
+
+- #121 - env.depends() does not work with built-root-relative "^/" paths
+- #130 - Document -f command line option
+- #133 - Clarify failed command error message indicating to run -F
+- #134 - Document CMD_STDOUT variable for Command builder
+- #135 - Write dependency file to build directory when user invokes Object builder directly
+- #141 - Document phony targets
+
+## v2.2.0
+
+### New Features
+
+- #120 - improve support for MSYS2
+- #119 - add failure messages for failed configuration checks
+- #118 - compiler checks should support cross-compilers and freestanding compilers
+
 ## v2.1.0
 
 ### New Features

DEVELOPING.md

@@ -0,0 +1,14 @@
+# Developing
+
+# Specs
+
+To run the rscons specs, the following commands must be available:
+
+* gcc
+* clang
+* g++
+* clang++
+* gdc
+* ldc
+* flex
+* bison

Gemfile.lock

@@ -1,32 +1,32 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    diff-lcs (1.3)
+    diff-lcs (1.4.4)
     docile (1.1.5)
-    json (2.3.0)
-    rake (13.0.1)
-    rdoc (6.2.1)
-    redcarpet (3.5.0)
-    rspec (3.9.0)
-      rspec-core (~> 3.9.0)
-      rspec-expectations (~> 3.9.0)
-      rspec-mocks (~> 3.9.0)
-    rspec-core (3.9.1)
-      rspec-support (~> 3.9.1)
-    rspec-expectations (3.9.1)
+    json (2.5.1)
+    rake (13.0.6)
+    rdoc (6.3.2)
+    redcarpet (3.5.1)
+    rspec (3.10.0)
+      rspec-core (~> 3.10.0)
+      rspec-expectations (~> 3.10.0)
+      rspec-mocks (~> 3.10.0)
+    rspec-core (3.10.1)
+      rspec-support (~> 3.10.0)
+    rspec-expectations (3.10.1)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.9.0)
-    rspec-mocks (3.9.1)
+      rspec-support (~> 3.10.0)
+    rspec-mocks (3.10.2)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.9.0)
-    rspec-support (3.9.2)
+      rspec-support (~> 3.10.0)
+    rspec-support (3.10.2)
     simplecov (0.15.1)
       docile (~> 1.1.0)
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
     syntax (1.2.2)
-    yard (0.9.24)
+    yard (0.9.26)
 
 PLATFORMS
   ruby

Rakefile.rb

@@ -17,12 +17,16 @@ task :build_dist do
 end
 
 RSpec::Core::RakeTask.new(:spec, :example_string) do |task, args|
+  ENV["specs"] = "1"
   if args.example_string
     ENV["partial_specs"] = "1"
     task.rspec_opts = %W[-e "#{args.example_string}" -f documentation]
   end
 end
 task :spec => :build_dist
+task :spec do
+  ENV.delete("specs")
+end
 
 # dspec task is useful to test the distributable release script, but is not
 # useful for coverage information.
@@ -31,7 +35,7 @@ task :dspec, [:example_string] => :build_dist do |task, args|
   FileUtils.mkdir_p("test")
   FileUtils.cp("dist/rscons", "test/rscons.rb")
   ENV["dist_specs"] = "1"
-  Rake::Task["spec"].invoke(args.example_string)
+  Rake::Task["spec"].execute(args.example_string)
   ENV.delete("dist_specs")
   FileUtils.rm_f(Dir.glob(".rscons-*"))
 end
@@ -89,6 +93,7 @@ unless RbConfig::CONFIG["host"]["msys"]
     yard.options = ["-ogen/yard"]
   end
 
+  desc "Build user guide"
   task :user_guide do
     system("ruby", "-Ilib", "rb/gen_user_guide.rb")
   end
@@ -99,6 +104,7 @@ task :default => :spec
 task :all => [
   :build_dist,
   :spec,
+  :dspec,
   :yard,
   :user_guide,
 ]

build_tests/simple/path_append/foobar

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+echo "foobar!"

build_tests/simple/path_append/gcc

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+exit 42

build_tests/simple/path_prepend/flex

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+echo "flex!"

build_tests/simple/pathing.rb

@@ -0,0 +1,10 @@
+path_prepend "path_prepend"
+path_append "path_append"
+
+build do
+  Environment.new do |env|
+    system("flex")
+    system("foobar")
+    env.Object("simple.o", "simple.c")
+  end
+end

build_tests/simple/user_dependencies_carat.rb

@@ -0,0 +1,18 @@
+class FileBuilder < Builder
+  def self.name
+    "File"
+  end
+  def run(options)
+    FileUtils.mkdir_p(File.dirname(@target))
+    File.binwrite(@target, ENV["file_contents"])
+    true
+  end
+end
+build do
+  Environment.new do |env|
+    env.add_builder(FileBuilder)
+    env.File("^/file.txt")
+    program = env.Program("^/simple.exe", Dir["*.c"])
+    env.depends("^/simple.exe", "^/file.txt")
+  end
+end

build_tests/subsidiary/Rsconscript

@@ -0,0 +1,10 @@
+configure do
+  rscons "sub/Rsconscript"
+  rscons "sub/Rsconscript2", "configure"
+  puts "top configure"
+end
+
+build do
+  rscons "sub/Rsconscript2", "build"
+  puts "top build"
+end

build_tests/subsidiary/Rsconscript_dir

@@ -0,0 +1,10 @@
+configure do
+  rscons "sub"
+  rscons "sub", "-f", "Rsconscript2", "configure"
+  puts "top configure"
+end
+
+build do
+  rscons "sub", "-f", "Rsconscript2", "build"
+  puts "top build"
+end

build_tests/subsidiary/Rsconscript_fail

@@ -0,0 +1,9 @@
+configure do
+  rscons "sub/Rsconscript_fail"
+  puts "top configure"
+end
+
+build do
+  rscons "sub/Rsconscript2", "build"
+  puts "top build"
+end

build_tests/subsidiary/Rsconscript_samedir

@@ -0,0 +1,4 @@
+build do
+  rscons "second", "build"
+  puts "top build"
+end

build_tests/subsidiary/second

@@ -0,0 +1,3 @@
+build do
+  puts "second build"
+end

build_tests/subsidiary/sub/Rsconscript

@@ -0,0 +1,7 @@
+configure do
+  puts "sub Rsconscript configure"
+end
+
+build do
+  puts "sub Rsconscript build"
+end

build_tests/subsidiary/sub/Rsconscript2

@@ -0,0 +1,7 @@
+configure do
+  puts "sub Rsconscript2 configure"
+end
+
+build do
+  puts "sub Rsconscript2 build"
+end

build_tests/subsidiary/sub/Rsconscript_fail

@@ -0,0 +1,8 @@
+configure do
+  puts "sub Rsconscript configure"
+  check_program "foobarfailure"
+end
+
+build do
+  puts "sub Rsconscript build"
+end

doc/user_guide.md

@@ -612,14 +612,26 @@ There are several default builders that are built-in to Rscons:
 ```ruby
 env.Command(target, sources, "CMD" => command)
 # Example
-env.Command("docs.html", "docs.md",
+env.Command("user_guide.html", "user_guide.md",
   "CMD" => ["pandoc", "-fmarkdown", "-thtml", "-o${_TARGET}", "${_SOURCES}"],
-  "CMD_DESC" => "PANDOC")
+  "CMD_DESC" => "Generating user guide:")
 ```
 
 The `Command` builder executes a user-defined command in order to produce the
 desired target file based on the provided source files.
 
+The `Command` builder supports the following construction variables:
+
+  * `CMD` (required) specifies the command to execute (an array of strings).
+    `CMD` is expanded for variable references, so the tokens `${_TARGET}` and
+    `${_SOURCES}` can be used, for example.
+  * `CMD_DESC` (optional) specifies the short text description to print when
+    the builder executes. The given description is followed by the target file
+    name.
+  * `CMD_STDOUT` (optional) specifies a file to redirect standard output to.
+    `CMD_STDOUT` is expanded for variable references, so the token `${_TARGET}`
+    can be used, for example.
+
 ####> The CFile Builder
 
 ```ruby
@@ -809,6 +821,22 @@ allows it to be used to create a shared library are added.
 Although it can be called explicitly, it is more commonly implicitly called by
 the `SharedLibrary` builder.
 
+###> Phony Targets
+
+rscons supports phony build targets.
+Normally, a builder produces an output file, and executes whenever the input
+files or command have changed.
+A phony build target can be used to register a builder that does not produce
+an output file.
+A custom builder can take some action when the input files change even if it
+does not produce an output file.
+Such a builder could perform verification or run a test on its source files,
+possibly failing if some conditions are not met.
+It could also simply output something to the console, such as an analysis of
+the source file, whenever it changes.
+A phony target is signified by passing a Symbol instead of a String as the
+first parameter (target) to a builder method.
+
 ###> Explicit Dependencies
 
 A target can be marked as depending on another file that Rscons would not
@@ -872,6 +900,70 @@ In other words, build targets are not parallelized across a barrier.
 env.barrier
 ```
 
+##> Global Build Script Functionality
+
+###> Using Subsidiary Build Scripts
+
+The `rscons` build script method can be used to invoke an rscons subprocess to
+perform an operation using a subsidiary rscons build script.
+This can be used, for example, when a subproject is imported and a top-level
+`configure` or `build` operation should also perform the same operation in the
+subproject directory.
+
+The first argument to the `rscons` method specifies either a directory name, or
+the path to the subsidiary Rsconscript file to execute.
+Any additional arguments are passed to `rscons` when it executes the subsidiary
+script.
+`rscons` will change working directories to the directory containing the
+subsidiary script when executing it.
+
+For example:
+
+```ruby
+configure do
+  rscons "subproject", "configure"
+end
+
+build do
+  rscons "subproject/Rsconscript", "build"
+end
+```
+
+It is also perfectly valid to perform a different operation in the subsidiary
+script from the one being performed in the top-level script.
+For example, in a project that requires a particular cross compiler, the
+top-level `configure` script could build the necessary cross compiler using a
+subsidiary build script.
+This could look something like:
+
+```ruby
+configure do
+  rscons "cross/Rsconscript"
+  check_c_compiler "i686-elf-gcc"
+end
+```
+
+This would build, and if necessary first configure, using the cross/Rsconscript
+subsidiary build script.
+Subsidiary build scripts are executed from within the directory containing the
+build script.
+
+###> PATH Management
+
+`rscons` provides methods for management of the `PATH` environment variable.
+
+The `path_append` and `path_prepend` methods can be used to append or prepend
+a path to the `PATH` environment variable.
+
+```ruby
+path_prepend "i686-elf-gcc/bin"
+```
+
+The `path_set` method sets the `PATH` environment variable to the given
+Array or String.
+The `path_components` method returns an Array of the components in the `PATH`
+environment variable.
+
 ##> Extending Rscons
 
 ### Adding New Languages

lib/rscons.rb

@@ -35,8 +35,8 @@ module Rscons
     :SharedObject,
   ]
 
-  # Class to represent a fatal error while building a target.
-  class BuildError < RuntimeError; end
+  # Class to represent a fatal error during an Rscons operation.
+  class RsconsError < RuntimeError; end
 
   class << self
 

lib/rscons/application.rb

@@ -136,8 +136,8 @@ module Rscons
           env.process
         end
         0
-      rescue BuildError => be
-        Ansi.write($stderr, :red, be.message, :reset, "\n")
+      rescue RsconsError => e
+        Ansi.write($stderr, :red, e.message, :reset, "\n")
         1
       end
     end
@@ -193,7 +193,10 @@ module Rscons
       co = ConfigureOp.new(options)
       begin
         @script.configure(co)
-      rescue ConfigureOp::ConfigureFailure
+      rescue RsconsError => e
+        if e.message and e.message != ""
+          $stderr.puts e.message
+        end
         Ansi.write($stderr, :red, "Configuration failed", :reset, "\n")
         rv = 1
       end

lib/rscons/builders/mixins/object.rb

@@ -75,10 +75,10 @@ module Rscons
             @vars["_SOURCES"] = @sources
             depfilesuffix = @env.expand_varref("${DEPFILESUFFIX}", vars)
             @vars["_DEPFILE"] =
-              if @vars[:direct]
-                @env.get_build_fname(target, depfilesuffix, self.class)
+              if @vars[:direct] || !@target.start_with?("#{@env.build_root}/")
+                @env.get_build_fname(@target, depfilesuffix, self.class)
               else
-                "#{target}#{depfilesuffix}"
+                "#{@target}#{depfilesuffix}"
               end
             @cache.mkdir_p(File.dirname(@vars["_DEPFILE"]))
             command = @env.build_command(@command_template, @vars)

lib/rscons/cli.rb

@@ -6,11 +6,13 @@ USAGE = <<EOF
 Usage: #{$0} [global options] [operation] [operation options]
 
 Global options:
+  -f FILE                     Use FILE as Rsconscript
   -F, --show-failure          Show failed command log from previous build and exit
-  --version                   Show rscons version and exit
   -h, --help                  Show rscons help and exit
+  -j N, --nthreads=N          Set number of threads (local default: #{Rscons.application.n_threads})
   -r COLOR, --color=COLOR     Set color mode (off, auto, force)
   -v, --verbose               Run verbosely
+  --version                   Show rscons version and exit
 
 Operations:
   configure                   Configure the project
@@ -23,10 +25,6 @@ Operations:
 Configure options:
   -b BUILD, --build=BUILD     Set build directory (default: build)
   --prefix=PREFIX             Set installation prefix (default: /usr/local)
-
-Build options:
-  -j N, --nthreads=N          Set number of threads (local default: #{Rscons.application.n_threads})
-
 EOF
 
 module Rscons

lib/rscons/configure_op.rb

@@ -5,9 +5,6 @@ module Rscons
   # Class to manage a configure operation.
   class ConfigureOp
 
-    # Exception raised when a configuration error occurs.
-    class ConfigureFailure < Exception; end
-
     # Create a ConfigureOp.
     #
     # @param options [Hash]
@@ -407,7 +404,7 @@ module Rscons
           options[:on_fail].call
         end
         if should_fail
-          raise ConfigureFailure.new
+          raise RsconsError.new
         end
       end
     end

lib/rscons/environment.rb

@@ -286,9 +286,9 @@ module Rscons
       unless @process_failures.empty?
         msg = @process_failures.join("\n")
         if Cache.instance["failed_commands"].size > 0
-          msg += "\nUse -F to view the failed command log from the previous build operation"
+          msg += "\nUse `#{Util.command_to_execute_me} -F` to view the failed command log from the previous build operation"
         end
-        raise BuildError.new(msg)
+        raise RsconsError.new(msg)
       end
     end
 
@@ -346,12 +346,12 @@ module Rscons
       if target.is_a?(Builder)
         target = target.target
       end
-      target = expand_varref(target.to_s)
+      target = expand_path(expand_varref(target.to_s))
       user_deps = user_deps.map do |ud|
         if ud.is_a?(Builder)
           ud = ud.target
         end
-        expand_varref(ud)
+        expand_path(expand_varref(ud))
       end
       @user_deps[target] ||= []
       @user_deps[target] = (@user_deps[target] + user_deps).uniq

lib/rscons/script.rb

@@ -3,8 +3,87 @@ module Rscons
   # The Script class encapsulates the state of a build script.
   class Script
 
-    # DSL available to the Rsconscript.
-    class Dsl
+    # Global DSL methods.
+    class GlobalDsl
+
+      # Return path components from the PATH variable.
+      #
+      # @return [Array<String>]
+      #   Path components from the PATH variable.
+      def path_components
+        ENV["PATH"].split(File::PATH_SEPARATOR)
+      end
+
+      # Prepend a path component to the PATH variable.
+      #
+      # @param path [String]
+      #   Path to prepend.
+      #
+      # @return [void]
+      def path_prepend(path)
+        path_set([File.expand_path(path)] + path_components)
+      end
+
+      # Append a path component to the PATH variable.
+      #
+      # @param path [String]
+      #   Path to append.
+      #
+      # @return [void]
+      def path_append(path)
+        path_set(path_components + [File.expand_path(path)])
+      end
+
+      # Set the PATH variable.
+      #
+      # @param new_path [String, Array<String>]
+      #   New PATH variable value as an array or string.
+      #
+      # @return [void]
+      def path_set(new_path)
+        if new_path.is_a?(Array)
+          new_path = new_path.join(File::PATH_SEPARATOR)
+        end
+        ENV["PATH"] = new_path
+      end
+
+      # Invoke rscons in a subprocess for a subsidiary Rsconscript file.
+      #
+      # @param path [String]
+      #   Path to subsidiary Rsconscript to execute, or path to subsidiary
+      #   directory to run rscons in.
+      # @param args[Array<String>]
+      #   Arguments to pass to rscons subprocess.
+      def rscons(path, *args)
+        rscons_path = File.expand_path($0)
+        path = File.expand_path(path)
+        if File.directory?(path)
+          command = [*args]
+          dir = path
+        else
+          command = ["-f", path, *args]
+          dir = File.dirname(path)
+        end
+        if File.exist?("#{dir}/rscons")
+          rscons_path = "#{dir}/rscons"
+        end
+        command = [rscons_path] + command
+        print_dir = dir != "." && dir != File.expand_path(Dir.pwd)
+        if ENV["specs"] and not ENV["dist_specs"] # specs
+          command = ["ruby", $LOAD_PATH.map {|p| ["-I", p]}, command].flatten # specs
+        end # specs
+        puts "rscons: Entering directory '#{dir}'" if print_dir
+        result = system(*command, chdir: dir)
+        puts "rscons: Leaving directory '#{dir}'" if print_dir
+        unless result
+          raise RsconsError.new("Failed command: " + command.join(" "))
+        end
+      end
+
+    end
+
+    # Top-level DSL available to the Rsconscript.
+    class Dsl < GlobalDsl
       # Create a Dsl.
       def initialize(script)
         @script = script
@@ -59,7 +138,7 @@ module Rscons
     end
 
     # DSL available to the 'configure' block.
-    class ConfigureDsl
+    class ConfigureDsl < GlobalDsl
       # Create a ConfigureDsl.
       #
       # @param configure_op [ConfigureOp]

lib/rscons/util.rb

@@ -217,6 +217,14 @@ module Rscons
         queue.pop
       end
 
+      # Command that can be run to execute this instance of rscons from the
+      # current working directory.
+      def command_to_execute_me
+        command = Pathname.new(File.expand_path($0)).relative_path_from(Dir.pwd).to_s
+        command = "./#{command}" unless command["/"]
+        command
+      end
+
       private
 
       # Check if a directory contains a certain executable.

lib/rscons/version.rb

@@ -1,4 +1,4 @@
 module Rscons
   # Project version.
-  VERSION = "2.2.0"
+  VERSION = "2.3.0"
 end

rb/build_dist.rb

@@ -44,7 +44,7 @@ combine_files[START_FILE]
 # Strip Ruby comment lines and empty lines to save some space, but do not
 # remove lines that are in heredoc sections. This isn't terribly robust to be
 # used in the wild, but works for the heredoc instances for this project.
-stripped_comments = []
+stripped = []
 heredoc_end = nil
 combined_file.each do |line|
   if line =~ /<<-?([A-Z]+)/
@@ -53,14 +53,16 @@ combined_file.each do |line|
   if heredoc_end and line =~ /^\s*#{heredoc_end}/
     heredoc_end = nil
   end
-  if heredoc_end or not (line =~ /^\s*(#[^!].*)?$/)
-    stripped_comments << line
+  if line !~ /#\sspecs/
+    if heredoc_end or line !~ /^\s*(#[^!].*)?$/
+      stripped << line
+    end
   end
 end
 
 require "zlib"
 require "base64"
-compressed_script = Zlib::Deflate.deflate(stripped_comments.join)
+compressed_script = Zlib::Deflate.deflate(stripped.join)
 encoded_compressed_script = Base64.encode64(compressed_script).gsub("\n", "")
 hash = Digest::MD5.hexdigest(encoded_compressed_script)
 

spec/build_tests_spec.rb

@@ -55,6 +55,8 @@ describe Rscons do
     end
   end
 
+  let(:passenv) {{}}
+
   def test_dir(build_test_directory)
     Dir.chdir(@owd)
     rm_rf(@build_test_run_dir)
@@ -118,21 +120,23 @@ describe Rscons do
     command_name = "#{command_prefix}#{@statics[:build_test_id]}"
     File.open("_simplecov_setup.rb", "w") do |fh|
       fh.puts <<EOF
-require "bundler"
-Bundler.setup
-require "simplecov"
-class MyFormatter
-  def format(*args)
+unless ENV["dist_specs"]
+  require "bundler"
+  Bundler.setup
+  require "simplecov"
+  class MyFormatter
+    def format(*args)
+    end
   end
-end
-SimpleCov.start do
-  root(#{@owd.inspect})
-  command_name(#{command_name.inspect})
-  filters.clear
-  add_filter do |src|
-    !(src.filename[SimpleCov.root])
+  SimpleCov.start do
+    root(#{@owd.inspect})
+    command_name(#{command_name.inspect})
+    filters.clear
+    add_filter do |src|
+      !(src.filename[SimpleCov.root])
+    end
+    formatter(MyFormatter)
   end
-  formatter(MyFormatter)
 end
 # force color off
 ENV["TERM"] = nil
@@ -145,6 +149,7 @@ EOF
     stdout, stderr, status = nil, nil, nil
     Bundler.with_unbundled_env do
       env = ENV.to_h
+      env.merge!(passenv)
       path = ["#{@build_test_run_dir}/_bin", "#{env["PATH"]}"]
       if options[:path]
         path = Array(options[:path]) + path
@@ -524,7 +529,7 @@ EOF
     result = run_rscons
     expect(result.stderr).to eq ""
     verify_lines(lines(result.stdout), [
-      %r{gcc -c -o one.o -MMD -MF one.o.mf -DONE one.c},
+      %r{gcc -c -o one.o -MMD -MF build/e.1/one.o.mf -DONE one.c},
       %r{gcc -c -o build/e.1/two.c.o -MMD -MF build/e.1/two.c.o.mf two.c},
       %r{gcc -o two_sources.exe one.o build/e.1/two.c.o},
     ])
@@ -564,8 +569,8 @@ EOF
     result = run_rscons(rsconscript: "build_hooks_override_vars.rb")
     expect(result.stderr).to eq ""
     verify_lines(lines(result.stdout), [
-      %r{gcc -c -o one.o -MMD -MF one.o.mf -Isrc -Isrc/one -Isrc/two -O1 src/two/two.c},
-      %r{gcc -c -o two.o -MMD -MF two.o.mf -Isrc -Isrc/one -Isrc/two -O2 src/two/two.c},
+      %r{gcc -c -o one.o -MMD -MF build/e.1/one.o.mf -Isrc -Isrc/one -Isrc/two -O1 src/two/two.c},
+      %r{gcc -c -o two.o -MMD -MF build/e.1/two.o.mf -Isrc -Isrc/one -Isrc/two -O2 src/two/two.c},
     ])
     expect(File.exists?('one.o')).to be_truthy
     expect(File.exists?('two.o')).to be_truthy
@@ -599,6 +604,27 @@ EOF
     expect(result.stdout).to eq ""
   end
 
+  it "rebuilds when user-specified dependencies using ^ change" do
+    test_dir("simple")
+
+    passenv["file_contents"] = "1"
+    result = run_rscons(rsconscript: "user_dependencies_carat.rb")
+    expect(result.stderr).to eq ""
+    verify_lines(lines(result.stdout), [
+      %r{Compiling simple.c},
+      %r{Linking .*simple.exe},
+    ])
+
+    passenv["file_contents"] = "2"
+    result = run_rscons(rsconscript: "user_dependencies_carat.rb")
+    expect(result.stderr).to eq ""
+    verify_lines(lines(result.stdout), [%r{Linking .*simple.exe}])
+
+    result = run_rscons(rsconscript: "user_dependencies_carat.rb")
+    expect(result.stderr).to eq ""
+    expect(result.stdout).to eq ""
+  end
+
   unless RUBY_PLATFORM =~ /mingw|msys/
     it "supports building D sources with gdc" do
       test_dir("d")
@@ -1040,7 +1066,7 @@ EOF
 
     result = run_rscons
     expect(result.stderr).to match /Failed to build/
-    expect(result.stderr).to match /^Use.*-F.*to view the failed command log/
+    expect(result.stderr).to match %r{^Use .*/rscons(\.rb)? -F.*to view the failed command log}
     expect(result.status).to_not eq 0
 
     result = run_rscons(rscons_args: %w[-F])
@@ -1449,6 +1475,25 @@ EOF
       expect(result.status).to eq 0
     end
 
+    it "allows prepending and appending to PATH" do
+      test_dir "simple"
+      result = run_rscons(rsconscript: "pathing.rb")
+      expect(result.stderr).to eq ""
+      expect(result.stdout).to match /flex!/
+      expect(result.stdout).to match /foobar!/
+      expect(File.exist?("simple.o")).to be_truthy
+    end
+
+    it "writes the dependency file to the build root" do
+      test_dir "simple"
+      result = run_rscons(rsconscript: "distclean.rb")
+      expect(result.stderr).to eq ""
+      expect(result.stdout).to match /Compiling simple\.c/
+      expect(File.exist?("simple.o")).to be_truthy
+      expect(File.exist?("simple.o.mf")).to be_falsey
+      expect(File.exist?("build/e.1/simple.o.mf")).to be_truthy
+    end
+
     context "debugging" do
       it "prints a message when the target does not exist" do
         test_dir("simple")
@@ -1542,7 +1587,7 @@ EOF
       result = run_rscons(rsconscript: "override_depfilesuffix.rb")
       expect(result.stderr).to eq ""
       verify_lines(lines(result.stdout), [
-        %r{gcc -c -o simple.o -MMD -MF simple.o.deppy simple.c},
+        %r{gcc -c -o simple.o -MMD -MF build/e.1/simple.o.deppy simple.c},
       ])
     end
 
@@ -2580,4 +2625,123 @@ EOF
     end
   end
 
+  context "with subsidiary scripts" do
+    context "with a script specified" do
+      it "executes the subsidiary script from configure block" do
+        test_dir "subsidiary"
+
+        result = run_rscons(op: %W[configure])
+        expect(result.stderr).to eq ""
+        verify_lines(lines(result.stdout), [
+          %r{Entering directory '.*/sub'},
+          %r{sub Rsconscript configure},
+          %r{Leaving directory '.*/sub'},
+          %r{Entering directory '.*/sub'},
+          %r{sub Rsconscript build},
+          %r{Leaving directory '.*/sub'},
+          %r{Entering directory '.*/sub'},
+          %r{sub Rsconscript2 configure},
+          %r{Leaving directory '.*/sub'},
+          %r{top configure},
+        ])
+      end
+
+      it "executes the subsidiary script from build block" do
+        test_dir "subsidiary"
+
+        result = run_rscons(op: %W[configure])
+        expect(result.stderr).to eq ""
+        result = run_rscons(op: %W[build])
+        expect(result.stderr).to eq ""
+        verify_lines(lines(result.stdout), [
+          %r{sub Rsconscript2 build},
+          %r{top build},
+        ])
+      end
+    end
+
+    context "with a directory specified" do
+      it "executes the subsidiary script from configure block" do
+        test_dir "subsidiary"
+
+        result = run_rscons(rsconscript: "Rsconscript_dir", op: %W[configure])
+        expect(result.stderr).to eq ""
+        verify_lines(lines(result.stdout), [
+          %r{Entering directory '.*/sub'},
+          %r{sub Rsconscript configure},
+          %r{Leaving directory '.*/sub'},
+          %r{Entering directory '.*/sub'},
+          %r{sub Rsconscript build},
+          %r{Leaving directory '.*/sub'},
+          %r{Entering directory '.*/sub'},
+          %r{sub Rsconscript2 configure},
+          %r{Leaving directory '.*/sub'},
+          %r{top configure},
+        ])
+      end
+
+      it "executes the subsidiary script from build block" do
+        test_dir "subsidiary"
+
+        result = run_rscons(rsconscript: "Rsconscript_dir", op: %W[configure])
+        expect(result.stderr).to eq ""
+        result = run_rscons(rsconscript: "Rsconscript_dir", op: %W[build])
+        expect(result.stderr).to eq ""
+        verify_lines(lines(result.stdout), [
+          %r{sub Rsconscript2 build},
+          %r{top build},
+        ])
+      end
+    end
+
+    context "with a rscons binary in the subsidiary script directory" do
+      it "executes rscons from the subsidiary script directory" do
+        test_dir "subsidiary"
+
+        File.binwrite("sub/rscons", <<EOF)
+#!/usr/bin/env ruby
+puts "sub rscons"
+EOF
+        FileUtils.chmod(0755, "sub/rscons")
+        result = run_rscons(op: %W[configure])
+        expect(result.stderr).to eq ""
+        verify_lines(lines(result.stdout), [
+          %r{Entering directory '.*/sub'},
+          %r{sub rscons},
+          %r{Leaving directory '.*/sub'},
+          %r{Entering directory '.*/sub'},
+          %r{sub rscons},
+          %r{Leaving directory '.*/sub'},
+          %r{Entering directory '.*/sub'},
+          %r{sub rscons},
+          %r{Leaving directory '.*/sub'},
+          %r{top configure},
+        ])
+      end
+    end
+
+    it "does not print entering/leaving directory messages when the subsidiary script is in the same directory" do
+      test_dir "subsidiary"
+
+      result = run_rscons(rsconscript: "Rsconscript_samedir", op: %W[configure])
+      expect(result.stderr).to eq ""
+      result = run_rscons(rsconscript: "Rsconscript_samedir", op: %W[build])
+      expect(result.stderr).to eq ""
+      expect(result.stdout).to_not match(%{(Entering|Leaving) directory})
+      verify_lines(lines(result.stdout), [
+        %r{second build},
+        %r{top build},
+      ])
+    end
+
+    it "terminates execution when a subsidiary script fails" do
+      test_dir "subsidiary"
+
+      result = run_rscons(rsconscript: "Rsconscript_fail", op: %W[configure])
+      expect(result.stderr).to_not eq ""
+      expect(result.status).to_not eq 0
+      expect(result.stdout).to_not match /top configure/
+    end
+  end
+
 end

spec/spec_helper.rb

@@ -1,25 +1,25 @@
-require "simplecov"
-
-SimpleCov.start do
-  add_filter "/spec/"
-  add_filter "/.bundle/"
-  if ENV["partial_specs"]
-    command_name "RSpec-partial"
-  else
-    command_name "RSpec"
-  end
-  if ENV["dist_specs"]
-    add_filter "/bin/"
-    add_filter "/lib/"
-  else
-    add_filter "test/rscons.rb"
-  end
-  project_name "Rscons"
-  merge_timeout 3600
-end
-
 if ENV["dist_specs"]
   require_relative "../test/rscons"
 else
+  require "simplecov"
+
+  SimpleCov.start do
+    add_filter "/spec/"
+    add_filter "/.bundle/"
+    if ENV["partial_specs"]
+      command_name "RSpec-partial"
+    else
+      command_name "RSpec"
+    end
+    if ENV["dist_specs"]
+      add_filter "/bin/"
+      add_filter "/lib/"
+    else
+      add_filter "test/rscons.rb"
+    end
+    project_name "Rscons"
+    merge_timeout 3600
+  end
+
   require "rscons"
 end