From 09feb190733a00fa1fd2a276bf3e389ddcbe22eb Mon Sep 17 00:00:00 2001
From: Luka Vandervelden <lukc@upyum.com>
Date: Sat, 3 Aug 2019 12:55:47 +0200
Subject: [PATCH] CLI & removal of test recipes.

---
 src/context.cr |  18 ++
 src/main.cr    | 528 +++++++------------------------------------------
 src/recipe.cr  |  70 ++++++-
 3 files changed, 154 insertions(+), 462 deletions(-)

diff --git a/src/context.cr b/src/context.cr
index 7601a7a..711f885 100644
--- a/src/context.cr
+++ b/src/context.cr
@@ -46,6 +46,9 @@ class Package::Context
 	getter building_backends = [] of Backend::Building
 	getter splitter_backends = [] of Backend::Splitter
 
+	# Directories where ports can be found.
+	getter repositories = [] of String
+
 	# Well, this will need configuration, auto-detection and conversion,
 	# but it’ll be kind of enough for now.
 	property architecture = "x86_64"
@@ -181,5 +184,20 @@ class Package::Context
 	def read_recipe(filename : String)
 		Recipe.new self, filename
 	end
+
+	def find_recipe(name : String) : Recipe?
+		recipe_file_name = ""
+
+		repo = @repositories.find do |repo|
+			repo_dir_name = "#{repo}/#{name}"
+			recipe_file_name = "#{repo_dir_name}/recipe.spec"
+
+			if Dir.exists?(repo_dir_name) && File.exists?(recipe_file_name)
+				next true
+			end
+		end
+
+		read_recipe recipe_file_name if repo
+	end
 end
 
diff --git a/src/main.cr b/src/main.cr
index 61b9f9a..a5f4912 100644
--- a/src/main.cr
+++ b/src/main.cr
@@ -1,478 +1,88 @@
+require "option_parser"
+require "file_utils"
+require "colorize"
 
 require "./context.cr"
 require "./recipe.cr"
 
 extend Package
 
-# FIXME: recipe.clean? context autoclean?
 context = Context.new()
 context.packaging_backend = "apk"
+context.repositories << "."
 
-recipes = [] of Package::Recipe
+requested_recipes = [] of String
+download_only = false
+do_not_clean = false
 
-# FIXME: context.new_recipe? context.recipe?
-recipes << Recipe.new(context, "hello", "2.10").tap do |recipe|
-	recipe.sources << "https://ftp.gnu.org/gnu/hello/hello-2.10.tar.gz"
+used_X = false
+OptionParser.parse! do |parser|
+	parser.banner = "Usage: package [options] <port <port <…>>>"
 
-	# This is a voluntary mix of automatic and manual build
-	# instructions.
-	# Also, installing in /package makes testing with a real-life
-	# package manager trivial and reduces the damage done in case
-	# of… containment failure. ]:->
-	recipe.instructions.configure << "cd hello-#{recipe.version} && ./configure --prefix=/usr"
-
-	recipe.url = "https://www.gnu.org/software/hello/"
-	recipe.description = "The GNU Hello program produces a familiar, friendly greeting."
-	recipe.dependencies << "gettext"
-
-	# Should be automatic now.
-	#recipe.packages << Package::Package.new(recipe).tap do |package|
-	#	package.name = "#{recipe.name}-man"
-	#	package.files = ["/package/share/man"]
-	#end
-end
-
-recipes << Recipe.new(context, "automake", "1.16").tap do |recipe|
-	recipe.sources << "https://ftp.gnu.org/gnu/automake/automake-#{recipe.version}.tar.gz"
-end
-
-recipes << Recipe.new(context, "autoconf", "2.69").tap do |recipe|
-	recipe.sources << "https://ftp.gnu.org/gnu/autoconf/autoconf-#{recipe.version}.tar.gz"
-
-	recipe.dependencies << "m4" << "perl"
-end
-
-recipes << Recipe.new(context, "libtool", "2.4.6").tap do |recipe|
-	recipe.sources << "http://ftpmirror.gnu.org/libtool/libtool-#{recipe.version}.tar.gz"
-end
-
-recipes << Recipe.new(context, "m4", "1.4.18").tap do |recipe|
-	recipe.sources << "https://ftp.gnu.org/gnu/m4/m4-#{recipe.version}.tar.gz"
-	recipe.dependencies << "perl"
-end
-
-recipes << Recipe.new(context, "bzip2", "1.0.6").tap do |recipe|
-	recipe.sources << "https://downloads.sourceforge.net/project/bzip2/bzip2-#{recipe.version}.tar.gz"
-
-	recipe.instructions.configure << "sed -i.orig -e '/^CFLAGS=/s/.*/CFLAGS = -O2 -fPIC/' #{recipe.dirname}/Makefile"
-	recipe.options["make install"] = "PREFIX='#{recipe.fake_root_directory}/usr'"
-end
-
-recipes << Recipe.new(context, "perl", "5.30.0").tap do |recipe|
-	recipe.sources << "https://www.cpan.org/src/5.0/perl-#{recipe.version}.tar.gz"
-
-	recipe.dependencies << "zlib" << "bzip2"
-
-	recipe.instructions.build << %(
-		set -e -x;
-		cd #{recipe.dirname};
-		BUILD_ZLIB=0;
-		BUILD_BZIP2=0;
-		BZIP2_LIB=/usr/lib;
-		BZIP2_INCLUDE=/usr/inculde;
-
-		export BUILD_ZLIB BUILD_BZIP2 BZIP2_LIB BZIP2_INCLUDE;
-		./Configure -des \
-			-Dcccdlflags='-fPIC' \
-			-Dcccdlflags='-fPIC' \
-			-Dccdlflags='-rdynamic' \
-			-Dprefix=/usr \
-			-Uprivlib=$_privlib \
-			-Darchlib=$_archlib \
-			-Dvendorprefix=/usr \
-			-Dvendorlib=/usr/share/perl5/vendor_perl \
-			-Dvendorarch=/usr/lib/perl5/vendor_perl \
-			-Dsiteprefix=/usr/local \
-			-Dsitelib=/usr/local/share/perl5/site_perl \
-			-Dsitearch=/usr/local/lib/perl5/site_perl \
-			-Dlocincpth=' ' \
-			-Dcc=gcc \
-			-Uoptimize="$CFLAGS" \
-			-Duselargefiles \
-			-Dusethreads \
-			-Duseshrplib \
-			-Dd_semctl_semun \
-			-Dman1dir=/usr/share/man/man1 \
-			-Dman3dir=/usr/share/man/man3 \
-			-Dinstallman1dir=/usr/share/man/man1 \
-			-Dinstallman3dir=/usr/share/man/man3 \
-			-Dman1ext='1' \
-			-Dman3ext='3pm' \
-			-Dcf_by='Alpine' \
-			-Ud_csh \
-			-Dusenm \
-		|| return 1
-		make libperl.so && make || return 1
-	)
-end
-
-recipes << Recipe.new(context, "apk-tools", "2.10.4").tap do |recipe|
-	recipe.sources << "https://dev.alpinelinux.org/archive/apk-tools/apk-tools-#{recipe.version}.tar.xz"
-
-	recipe.options["make"] = "LUAAPK= static"
-
-	recipe.instructions.install << "mkdir -p '#{recipe.fake_root_directory}/sbin'"
-	recipe.instructions.install << "cp apk-tools-#{recipe.version}/src/apk.static '#{recipe.fake_root_directory}/sbin/apk'"
-
-	[
-		"/var/lib/apk",
-		"/var/cache/misc",
-		"/etc/apk/keys",
-		"/etc/apk/protected_paths.d"
-	].each do |dir|
-		recipe.instructions.install << "mkdir -p '#{recipe.fake_root_directory}#{dir}'"
-	end
-
-	#recipe.build_dependencies << "zlib-dev" << "openssl-dev" << "linux-dev"
-end
-
-recipes << Recipe.new(context, "abuild", "3.4.0").tap do |recipe|
-	recipe.sources << "https://dev.alpinelinux.org/archive/abuild/abuild-#{recipe.version}.tar.xz"
-end
-
-recipes << Recipe.new(context, "pkg-config", "0.29.2").tap do |recipe|
-	recipe.sources << "http://pkgconfig.freedesktop.org/releases/pkg-config-#{recipe.version}.tar.gz"
-
-	# FIXME: We’ll want to remove this at some point.
-	recipe.options["configure"] = "--with-internal-glib"
-end
-
-recipes << Recipe.new(context, "tar", "1.32").tap do |recipe|
-	recipe.sources << "http://ftp.gnu.org/gnu/tar/tar-#{recipe.version}.tar.gz"
-	recipe.options["configure"] = "FORCE_UNSAFE_CONFIGURE=1"
-end
-
-recipes << Recipe.new(context, "libarchive", "3.3.3").tap do |recipe|
-	recipe.sources << "https://www.libarchive.org/downloads/libarchive-#{recipe.version}.tar.gz"
-
-	# Conflicts with “tar” (gnu tar)
-	#recipe.instructions.install << "cd #{recipe.dirname} && make DESTDIR='#{recipe.fake_root_directory}' install"
-	#recipe.instructions.install << "cd '#{recipe.fake_root_directory}' && ln -s /usr/bin/bsdtar usr/bin/tar"
-end
-
-# FIXME: Build and install the actual kernel.
-recipes << Recipe.new(context, "linux", "5.2.4").tap do |recipe|
-	recipe.sources << "https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-#{recipe.version}.tar.xz"
-
-	recipe.instructions.build << "true"
-
-	recipe.instructions.install << "mkdir -p '#{recipe.fake_root_directory}/usr'"
-	recipe.instructions.install << "cd '#{recipe.dirname}' && make headers_install ARCH=x86_64 INSTALL_HDR_PATH='#{recipe.fake_root_directory}/usr'"
-end
-
-recipes << Recipe.new(context, "make", "4.2").tap do |recipe|
-	recipe.sources << "https://ftp.gnu.org/gnu/make/make-#{recipe.version}.tar.gz"
-end
-
-recipes << Recipe.new(context, "zlib", "1.2.11").tap do |recipe|
-	recipe.sources << "https://www.zlib.net/zlib-#{recipe.version}.tar.gz"
-end
-
-# Be careful with that one. It’s not configured to use proper prefixes.
-# (Not sure that it should though. It’s gotta put things in /sbin anyway.)
-recipes << Recipe.new(context, "sysvinit", "2.95").tap do |recipe|
-	recipe.sources << "https://git.savannah.nongnu.org/cgit/sysvinit.git/snapshot/sysvinit-#{recipe.version}.tar.gz"
-	recipe.url = "https://savannah.nongnu.org/projects/sysvinit"
-	recipe.description = "System V-like init system."
-	recipe.dependencies << "util-linux"
-
-	recipe.instructions.install << "cd sysvinit-#{recipe.version} && make ROOT='#{recipe.fake_root_directory}' install"
-end
-
-recipes << Recipe.new(context, "musl", "1.1.23").tap do |recipe|
-	recipe.sources << "https://www.musl-libc.org/releases/musl-#{recipe.version}.tar.gz"
-	recipe.url = "https://www.musl-libc.org/"
-	recipe.description = "The musl c library (libc) implementation."
-	recipe.options["configure"] = "--prefix=/usr --libdir=/lib --syslibdir=/lib --enable-shared --enable-static"
-	# FIXME: We need to make a few symlinks (libm.so, libpthread.so, librt.so, libdl.so.)
-	# FIXME: We should probably add a ldd script too.
-end
-
-recipes << Recipe.new(context, "libffi", "3.2.1").tap do |recipe|
-	recipe.sources << "ftp://sourceware.org/pub/libffi/libffi-#{recipe.version}.tar.gz"
-
-	recipe.instructions.install << %{
-		set -e;
-		cd #{recipe.dirname};
-		make DESTDIR="#{recipe.fake_root_directory}" install;
-		cd "#{recipe.fake_root_directory}";
-		mv usr/lib/libffi-#{recipe.version}/include usr;
-		nuke usr/lib/libffi-#{recipe.version}
-	}
-end
-
-recipes << Recipe.new(context, "python", "3.7.4").tap do |recipe|
-	recipe.sources << "https://www.python.org/ftp/python/#{recipe.version}/Python-#{recipe.version}.tgz"
-	recipe.dirname = "Python-#{recipe.version}"
-end
-
-recipes << Recipe.new(context, "crystal", "0.29.9").tap do |recipe|
-	# FIXME: Arrows, ASAP.
-	#recipe.sources << "https://github.com/crystal-lang/crystal/archive/#{recipe.version}.tar.gz"
-
-	recipe.dirname = "crystal-8b3dba72bd681118b2b761c68d7d2fdcbbbfceb2"
-	recipe.sources << "https://github.com/crystal-lang/crystal/archive/8b3dba72bd681118b2b761c68d7d2fdcbbbfceb2.zip"
-
-	recipe.dependencies << "libyaml" << "libevent" << "pcre" << "openssl"
-
-	recipe.options["make"] = "release=1 LLVM_CONFIG=/usr/bad/llvm-6/bin/llvm-config"
-	recipe.instructions.install << %{
-		set -e
-		cd #{recipe.dirname};
-		PKG="#{recipe.fake_root_directory}";
-		mkdir -p "$PKG/usr/bin";
-		mkdir -p "$PKG/usr/lib/crystal/core";
-		mkdir -p "$PKG/usr/share/man/man1";
-
-		install -D -m 755 .build/crystal "$PKG"/usr/bin/crystal;
-		install -D -m 644 man/crystal.1 "$PKG"/usr/share/man/man1/crystal.1;
-		cp -r src/* "$PKG/usr/lib/crystal/core";
-		cd "$PKG/usr/lib/crystal/core";
-		nuke ext/sigfault.* llvm/ext/llvm_ext.o
-	}
-end
-
-[{"6", "6.0.1"}, {"7", "7.1.0"},{"8", "8.0.0"}].each do |branch, version|
-	recipes << Recipe.new(context, "llvm-#{branch}", version).tap do |recipe|
-		recipe.sources << "http://releases.llvm.org/#{recipe.version}/llvm-#{recipe.version}.src.tar.xz"
-		recipe.url = "http://llvm.org"
-		recipe.description = "The LLVM Project is a collection of modular and reusable compiler and toolchain technologies."
-
-		recipe.dependencies << "libffi"
-
-		# Build-deps.
-		#recipe.build_dependencies << "cmake"
-		#recipe.build_dependencies << "make"
-		#recipe.build_dependencies << "libffi-dev"
-		#recipe.build_dependencies << "musl-dev"
-
-		recipe.instructions.configure << "mkdir #{recipe.name}-#{recipe.version}"
-		# FIXME: BROKEN
-		recipe.instructions.configure << <<-EOF
-			cd #{recipe.name}-#{recipe.version} && \
-			cmake ../llvm-#{recipe.version}.src \
-				-DCMAKE_INSTALL_PREFIX=/usr/bad/llvm-#{branch} \
-				-DLLVM_BUILD_DOCS=OFF \
-				-DLLVM_BUILD_EXAMPLES=OFF \
-				-DLLVM_BUILD_EXTERNAL_COMPILER_RT=ON \
-				-DLLVM_BUILD_LLVM_DYLIB=ON \
-				-DLLVM_ENABLE_ASSERTIONS=OFF \
-				-DLLVM_ENABLE_CXX1Y=ON \
-				-DLLVM_ENABLE_FFI=ON \
-				-DLLVM_ENABLE_LIBCXX=OFF \
-				-DLLVM_ENABLE_PIC=ON \
-				-DLLVM_ENABLE_RTTI=ON \
-				-DLLVM_ENABLE_SPHINX=OFF \
-				-DLLVM_ENABLE_TERMINFO=ON \
-				-DLLVM_ENABLE_ZLIB=ON \
-				-DLLVM_INCLUDE_EXAMPLES=OFF \
-				-DLLVM_LINK_LLVM_DYLIB=ON \
-				-DCMAKE_BUILD_TYPE=Release \
-				-DCMAKE_CXX_FLAGS="-fPIC -O2" \
-				-DCMAKE_C_FLAGS="-fPIC -O2"
-EOF
-		
-		recipe.instructions.build << "pwd && ls && cd #{recipe.name}-#{recipe.version} && make"
-		recipe.instructions.install << "cd #{recipe.name}-#{recipe.version} && make DESTDIR='#{recipe.fake_root_directory}' install"
-	end
-end
-
-recipes << Recipe.new(context, "cmake", "3.15.1").tap do |recipe|
-	recipe.sources << "https://github.com/Kitware/CMake/releases/download/v3.15.1/cmake-#{recipe.version}.tar.gz"
-end
-
-recipes << Recipe.new(context, "gmp", "6.1.2").tap do |recipe|
-	recipe.sources << "https://gmplib.org/download/gmp/gmp-#{recipe.version}.tar.xz"
-end
-
-recipes << Recipe.new(context, "mpfr", "4.0.2").tap do |recipe|
-	recipe.sources << "https://www.mpfr.org/mpfr-current/mpfr-#{recipe.version}.tar.xz"
-end
-
-recipes << Recipe.new(context, "mpc", "1.1.0").tap do |recipe|
-	recipe.sources << "https://ftp.gnu.org/gnu/mpc/mpc-#{recipe.version}.tar.gz"
-end
-
-recipes << Recipe.new(context, "gcc", "9.1.0").tap do |recipe|
-	recipe.sources << "https://ftp.gnu.org/gnu/gcc/gcc-9.1.0/gcc-#{recipe.version}.tar.xz"
-
-	recipe.dependencies << "gmp" << "mpfr" << "mpc" << "binutils"
-
-	recipe.dirname = "build"
-	recipe.instructions.configure << %(
-		set -e;
-		mkdir build;
-		cd build;
-		sed -e '/m64=/s/lib64/lib/' \
-			-i.orig ../gcc-#{recipe.version}/gcc/config/i386/t-linux64;
-		../gcc-#{recipe.version}/configure \
-			--prefix=/usr \
-			--libdir=/usr/lib \
-			--disable-multilib \
-			--disable-libssp \
-			--disable-libmpx \
-			--disable-libmudflap \
-			--disable-libsanitizer \
-			--disable-nls \
-			--disable-werror \
-			--enable-languages=c,c++ \
-			--target=x86_64-junk-linux-musl \
-			--build=x86_64-junk-linux-musl \
-			--host=x86_64-junk-linux-musl
-	)
-end
-
-recipes << Recipe.new(context, "zsh", "5.7.1").tap do |recipe|
-	recipe.sources << "https://downloads.sourceforge.net/project/zsh/zsh/#{recipe.version}/zsh-#{recipe.version}.tar.xz"
-	recipe.url = "https://zsh.org"
-	recipe.description = "Zsh is a shell designed for interactive use, although it is also a powerful scripting language."
-	recipe.dependencies << "ncurses"
-	recipe.options["configure"] = "--with-tcsetpgrp"
-
-	# Build-deps.
-	#recipe.build_dependencies << "ncurses-dev"
-end
-
-recipes << Recipe.new(context, "ncurses", "6.1").tap do |recipe|
-	recipe.sources << "ftp://ftp.invisible-island.net/ncurses/ncurses-#{recipe.version}.tar.gz"
-	recipe.url = "https://www.gnu.org/software/ncurses/"
-	recipe.options["configure"] = "--enable-widec --without-ada --with-shared --enable-pc-files --disable-termcap"
-
-	recipe.instructions.install << "cd ncurses-#{recipe.version} && make 'DESTDIR=#{recipe.fake_root_directory}' install"
-
-	# Already provided bu busybox.
-	recipe.instructions.install << "cd '#{recipe.fake_root_directory}' && rm usr/bin/clear usr/bin/reset"
-end
-
-recipes << Recipe.new(context, "busybox", "1.31.0").tap do |recipe|
-	recipe.sources << "https://busybox.net/downloads/busybox-#{recipe.version}.tar.bz2"
-
-	recipe.instructions.configure << "cd busybox-#{recipe.version} && make defconfig"
-	recipe.instructions.configure << "sed -i -e 's/.*CONFIG_STATIC.*/CONFIG_STATIC=y/' busybox-#{recipe.version}/.config"
-	recipe.instructions.install << "mkdir -p '#{recipe.fake_root_directory}/bin'"
-	recipe.instructions.install << "mkdir -p '#{recipe.fake_root_directory}/sbin'"
-	recipe.instructions.install << "mkdir -p '#{recipe.fake_root_directory}/usr/bin'"
-	recipe.instructions.install << "mkdir -p '#{recipe.fake_root_directory}/usr/sbin'"
-	recipe.instructions.install << "cp busybox-#{recipe.version}/busybox '#{recipe.fake_root_directory}/bin/busybox'"
-	recipe.instructions.install << "chroot '#{recipe.fake_root_directory}' /bin/busybox --install -s"
-
-	#recipe.build_dependencies << "linux-dev"
-end
-
-recipes << Recipe.new(context, "rc", "0.0.1").tap do |recipe|
-	recipe.sources << "https://git.karchnu.fr/JunkOS/rc/archive/579e431144e33b2510260b1bce5505fd328d2961.tar.gz"
-
-	# Those two are required due to a lack of robustness in our current backends.
-	recipe.instructions.configure << "true"
-	recipe.instructions.build << "true"
-	
-	recipe.instructions.install << "mkdir -p '#{recipe.fake_root_directory}/etc'"
-	recipe.instructions.install << "cp rc/* '#{recipe.fake_root_directory}/etc/'"
-end
-
-recipes << Recipe.new(context, "libyaml", "0.2.2").tap do |recipe|
-	recipe.sources << "https://github.com/yaml/libyaml/archive/#{recipe.version}.tar.gz"
-
-	recipe.instructions.configure << "cd libyaml-#{recipe.version} && ./bootstrap && ./configure --prefix=/usr"
-
-	# recipe.build_dependencies << "autoconf" << "libtool"
-end
-
-# FIXME: This one will fail on non-x86_64 platforms. Also on non-linux
-#        platforms. This build script is total shit.
-recipes << Recipe.new(context, "openssl", "1.1.1c").tap do |recipe|
-	recipe.sources << "https://www.openssl.org/source/openssl-#{recipe.version}.tar.gz"
-
-	recipe.instructions.configure << "cd openssl-#{recipe.version} && ./Configure --prefix=/usr linux-x86_64"
-end
-
-recipes << Recipe.new(context, "libevent", "2.1.10").tap do |recipe|
-	recipe.sources << "https://github.com/libevent/libevent/releases/download/release-#{recipe.version}-stable/libevent-#{recipe.version}-stable.tar.gz"
-
-	recipe.dirname = "libevent-#{recipe.version}-stable"
-end
-
-recipes << Recipe.new(context, "pcre2", "10.33").tap do |recipe|
-	recipe.sources << "ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre2-#{recipe.version}.tar.gz"
-end
-
-recipes << Recipe.new(context, "pcre", "8.43").tap do |recipe|
-	recipe.sources << "ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-#{recipe.version}.tar.gz"
-
-	recipe.options["configure"] = %( \
-		--enable-utf8 \
-		--enable-unicode-properties \
-		--enable-pcre8 \
-		--enable-pcre16 \
-		--enable-pcre32 \
-		--with-match-limit-recursion=8192
-	)
-end
-
-recipes << Recipe.new(context, "binutils", "2.32").tap do |recipe|
-	recipe.sources << "https://ftp.gnu.org/gnu/binutils/binutils-#{recipe.version}.tar.xz"
-
-	recipe.options["configure"] = %( \
-		--disable-multilib \
-		--with-pic --disable-nls
-	)
-	recipe.options["make"] = "tooldir=/usr"
-	recipe.instructions.install << "cd #{recipe.dirname} && make 'DESTDIR=#{recipe.fake_root_directory}' tooldir=/usr install && rm '#{recipe.fake_root_directory}/usr/bin/strings'"
-end
-
-recipes << Recipe.new(context, "readline", "8.0").tap do |recipe|
-	recipe.sources << "ftp://ftp.gnu.org/gnu/readline/readline-#{recipe.version}.tar.gz"
-end
-
-recipes << Recipe.new(context, "gc", "8.0.4").tap do |recipe|
-	recipe.sources << "https://github.com/ivmai/bdwgc/releases/download/v#{recipe.version}/gc-#{recipe.version}.tar.gz"
-end
-
-recipes << Recipe.new(context, "clang", "8.0.1").tap do |recipe|
-	recipe.sources << "https://github.com/llvm/llvm-project/releases/download/llvmorg-#{recipe.version}/cfe-#{recipe.version}.src.tar.xz"
-	recipe.dirname = "build"
-
-	recipe.instructions.configure << "mkdir build && cd build && cmake ../cfe-#{recipe.version}.src -DCMAKE_PREFIX_PATH=/usr/bad/llvm-8 -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Release"
-end
-
-recipes << Recipe.new(context, "service", "0.0.1").tap do |recipe|
-	recipe.sources << "" # FIXME
-end
-
-if ARGV.size == 0 || ARGV[0]? == "-h"
-	pp recipes.map &.name
-	exit 0
-end
-
-selected_recipes = ARGV.map do |name|
-	recipes.find(&.name.==(name)) || name
-end
-
-if selected_recipes.any? &.is_a?(String)
-		puts "At least one of the requested recipes is not known."
-
-		selected_recipes.select! &.is_a?(String)
-		pp! selected_recipes
-	end
-
-	# Getting rid of Strings.
-	selected_recipes = selected_recipes.compact_map do |recipe|
-		if recipe.is_a? String
-			nil
-		else
-			recipe
+	parser.on("-X DIR", "--repository DIR", "Sets a ports repository for finding dependencies (default=.).") { |dir|
+		unless used_X
+			while context.repositories.pop?
+			end
+			used_X = true
 		end
+
+		context.repositories << dir
+	}
+
+	parser.on("-D", "--download-only", "Only download sources, do not build.") {
+		download_only = true
+	}
+
+	parser.on("-k", "--keep-work-dir", "Do not clean after building.") {
+		do_not_clean = true
+	}
+
+	parser.invalid_option do |flag|
+		STDERR.puts "ERROR: #{flag} is not a valid option."
+		STDERR.puts parser
+		exit(1)
 	end
 
-	selected_recipes.each do |recipe|
-		pp recipe
+	parser.unknown_args do |arg|
+		requested_recipes = arg
+	end
+end
 
-		raise "oh no, download failed" unless recipe.download
-		raise "oh no, extraction failed" unless recipe.extract
+found_recipes = requested_recipes.map do |name|
+	puts context.find_recipe(name)
+	context.find_recipe(name) || name
+end
 
-		raise "oh no, build failed" unless recipe.build
-		raise "oh no, packaging failed" unless recipe.package
+invalid_recipes = found_recipes.select &.is_a?(String)
+if invalid_recipes.size > 0
+	STDERR.puts "ERROR: some of the requested recipes could not be found:"
+	invalid_recipes.each do |name|
+		STDERR.puts "        - #{name}"
+	end
+	STDERR.puts "       (try using -X?)"
+end
 
-		recipe.clean
+recipes = found_recipes.compact_map do |recipe_or_string|
+	recipe_or_string unless recipe_or_string.is_a?(String)
+end
+
+# FIXME: Now we need to build their respective deptrees and to deduplicate
+#        the list of recipes.
+
+recipes.each do |recipe|
+	puts " >> #{recipe.name}".colorize :white
+
+	raise "oh no, download failed" unless recipe.download
+
+	if download_only
+		exit 0
 	end
 
+	raise "oh no, extraction failed" unless recipe.extract
+
+	raise "oh no, build failed" unless recipe.build
+	raise "oh no, packaging failed" unless recipe.package
+
+	recipe.clean unless do_not_clean
+end
+
diff --git a/src/recipe.cr b/src/recipe.cr
index ea13160..d1e6f29 100644
--- a/src/recipe.cr
+++ b/src/recipe.cr
@@ -131,10 +131,10 @@ class Package::Recipe
 			"pkg" => fake_root_directory
 		}
 
-		raise "Could not parse `#{filename}`" if specs.nil?
+		name : String? = nil
+		version : String? = nil
 
-		@name = "" # Needed to avoid build-time errors.
-		@version = "" # Same.
+		raise "Could not parse `#{filename}`" if specs.nil?
 
 		specs.assignments.each do |key, value|
 			case key
@@ -352,5 +352,69 @@ class Package::Recipe
 	def to_s
 		"#{name}-#{version}"
 	end
+
+	def to_spec_s
+		spec = [
+			"name: #{name}",
+			"version: #{version}",
+			"release: #{release}"
+		].join("\n") + "\n"
+
+		if @sources.size == 1
+			spec += "sources: #{sources[0].to_s.gsub @version, "%{version}"}\n"
+		end
+
+		if maintainer
+			spec += "maintainer: #{maintainer}\n"
+		end
+		if packager
+			spec += "packager: #{packager}\n"
+		end
+
+		if @options.size > 0
+			spec += "options:\n"
+			@options.each do |key, value|
+				value = value.gsub fake_root_directory, "%{pkg}"
+				spec += "\t- #{key}: #{value}\n"
+			end
+			spec += "\n" # Limitation of the current implementation.
+		end
+
+		if @dependencies.size > 0
+			spec += "dependencies:\n"
+			@dependencies.each do |dep|
+				spec += "\t- #{dep}\n"
+			end
+			spec += "\n"
+		end
+
+		if @dirname
+			spec += "dirname: #{@dirname}\n"
+		end
+
+		[
+			{"configure", @instructions.configure},
+			{"build",     @instructions.build},
+			{"install",   @instructions.install}
+		].each do |name, instructions|
+			if instructions.size > 0
+				spec += "@#{name}\n"
+				instructions.each do |line|
+					line = line.gsub /^\t* *\n/, ""
+					line = line.gsub /\n *\t*\n/, "\n"
+					line = line.gsub /\n *\t*$/, ""
+					line = line.gsub fake_root_directory, "%{pkg}"
+					line = line.gsub name, "%{name}"
+					line = line.gsub version, "%{version}"
+					line = line.gsub dirname, "%{dirname}"
+					line = line.gsub(/^[\t ]*/, "").gsub(/\n\t*/, "\n\t")
+					spec += "\t#{line}\n"
+				end
+				spec += "\n" # Limitation of the current implementation.
+			end
+		end
+
+		spec
+	end
 end