Configuration file added.

Makefile

@@ -8,6 +8,7 @@ SHAREDIR := $(PREFIX)/share
 INCLUDEDIR := $(PREFIX)/include
 MANDIR := $(SHAREDIR)/man
 LIBEXECDIR := $(PREFIX)/libexec
+SYSCONFDIR := $(PREFIX)/etc
 VERSION := 0.3.0
 
 CC := cc
@@ -54,7 +55,7 @@ assemble-apk.sh.uninstall:
 
 src/config.cr: src/config.cr.in src
 	@echo '  SED >   src/config.cr'
-	$(Q)sed -e 's&@PREFIX@&$(PREFIX)&;s&@BINDIR@&$(BINDIR)&;s&@LIBDIR@&$(LIBDIR)&;s&@SHAREDIR@&$(SHAREDIR)&;s&@INCLUDEDIR@&$(INCLUDEDIR)&;s&@MANDIR@&$(MANDIR)&;s&@LIBEXECDIR@&$(LIBEXECDIR)&;s&@VERSION@&$(VERSION)&;' src/config.cr.in > 'src/config.cr'
+	$(Q)sed -e 's&@PREFIX@&$(PREFIX)&;s&@BINDIR@&$(BINDIR)&;s&@LIBDIR@&$(LIBDIR)&;s&@SHAREDIR@&$(SHAREDIR)&;s&@INCLUDEDIR@&$(INCLUDEDIR)&;s&@MANDIR@&$(MANDIR)&;s&@LIBEXECDIR@&$(LIBEXECDIR)&;s&@SYSCONFDIR@&$(SYSCONFDIR)&;s&@VERSION@&$(VERSION)&;' src/config.cr.in > 'src/config.cr'
 	$(Q)chmod +x 'src/config.cr'
 
 
@@ -183,6 +184,7 @@ help:
 	@echo '    - INCLUDEDIR     ${INCLUDEDIR}'
 	@echo '    - MANDIR         ${MANDIR}'
 	@echo '    - LIBEXECDIR     ${LIBEXECDIR}'
+	@echo '    - SYSCONFDIR     ${SYSCONFDIR}'
 	@echo '    - VERSION        ${VERSION}'
 	@echo ''
 	@echo 'Project targets: '

project.zsh

@@ -4,6 +4,7 @@ version=0.3.0
 
 variables+=(
 	LIBEXECDIR  '$(PREFIX)/libexec'
+	SYSCONFDIR  '$(PREFIX)/etc'
 	VERSION     "$version"
 )
 

src/config.cr.in

@@ -1,6 +1,7 @@
 
 # These values are changed by `make` at build-time.
 OWN_LIBEXEC_DIR        = "@LIBEXECDIR@/package"
+SYSCONF_DIR            = "@SYSCONFDIR@"
 
 module Package
 	Version = "@VERSION@"

src/context.cr

@@ -1,3 +1,5 @@
+require "specfileparser"
+
 require "./exception.cr"
 
 require "./config.cr"
@@ -224,5 +226,21 @@ class Package::Context
 
 		read_recipe recipe_file_name if repo
 	end
+
+	def read_configuration(filename : String)
+		specs = SpecFileParser.parse(filename).not_nil!
+
+		specs.assignments.each do |key, value|
+			puts key, value
+			case key
+			when "packages-directory"
+				@packages_directory = value.as_s
+			when "sources-directory"
+				@sources_directory = value.as_s
+			when "prefixes"
+				@prefixes = value.as_a_or_s
+			end
+		end
+	end
 end
 

src/main.cr

@@ -11,6 +11,9 @@ context = Context.new()
 context.packaging_backend = "apk"
 context.repositories << "."
 
+configuration_file = "#{SYSCONF_DIR}/package.cfg"
+configuration_file_requested = false
+
 requested_recipes = [] of String
 download_only = false
 do_not_clean = false
@@ -29,6 +32,11 @@ OptionParser.parse! do |parser|
 		context.repositories << dir
 	}
 
+	parser.on("-c FILE", "--conf FILE", "Use a configuration file other than the default one.") { |file|
+		configuration_file = file
+		configuration_file_requested = true
+	}
+
 	parser.on("-D", "--download-only", "Only download sources, do not build.") {
 		download_only = true
 	}
@@ -58,6 +66,13 @@ OptionParser.parse! do |parser|
 	end
 end
 
+if File.exists? configuration_file
+	context.read_configuration configuration_file
+elsif configuration_file_requested
+	STDERR.puts "ERROR: configuration file '#{configuration_file}' does not exist"
+	exit 1
+end
+
 found_recipes = requested_recipes.map do |name|
 	puts context.find_recipe(name)
 	context.find_recipe(name) || name