Automatically generate constants list for crew const (#5796)

* Automatically generate constants list for crew const * Document code

Automatically generate constants list for crew const (#5796)
* Automatically generate constants list for crew const * Document code
003b8772 · satmandu · GitHub · 6622da08 · 003b8772 · 003b8772
Commit 003b8772 authored May 18, 2021 by satmandu Committed by GitHub May 18, 2021
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bin/crew bin/crew +37 -38

lib/const.rb lib/const.rb +1 -1

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--- a/bin/crew
+++ b/bin/crew
@@ -402,45 +402,44 @@ def const(var)
    value = eval(var)
    puts "#{var}=#{value}"
  else
-    vars = [
+    @ruby_default_constants = %w[
-      'ARCH',
+      ARGF
-      'ARCH_LIB',
+      ARGV
-      'CHROMEOS_RELEASE',
+      CROSS_COMPILING
-      'CURL',
+      DOC
-      'CREW_BREW_DIR',
+      ENV
-      'CREW_BUILD',
+      GC
-      'CREW_CMAKE_LIBSUFFIX_OPTIONS',
+      IO
-      'CREW_CMAKE_OPTIONS',
+      JSON
-      'CREW_CONFIG_PATH',
+      OpenSSL
-      'CREW_DEST_DIR',
+      Q
-      'CREW_DEST_HOME',
+      R
-      'CREW_DEST_LIB_PREFIX',
+      RUBY_COPYRIGHT
-      'CREW_DEST_MAN_PREFIX',
+      RUBY_DESCRIPTION
-      'CREW_DEST_PREFIX',
+      RUBY_ENGINE
-      'CREW_LIB_PATH',
+      RUBY_ENGINE_VERSION
-      'CREW_LIB_PREFIX',
+      RUBYGEMS_ACTIVATION_MONITOR
-      'CREW_LIB_SUFFIX',
+      RUBY_PATCHLEVEL
-      'CREW_MAN_PREFIX',
+      RUBY_PLATFORM
-      'CREW_COMMON_FLAGS',
+      RUBY_RELEASE_DATE
-      'CREW_COMMON_FNO_LTO_FLAGS',
+      RUBY_REVISION
-      'CREW_ENV_OPTIONS',
+      RUBY_VERSION
-      'CREW_MESON_FNO_LTO_OPTIONS',
+      RubyVM
-      'CREW_MESON_OPTIONS',
+      S
-      'CREW_META_PATH',
+      STDERR
-      'CREW_NOT_COMPRESS',
+      STDIN
-      'CREW_NOT_STRIP',
+      STDOUT
-      'CREW_NPROC',
+      StringIO
-      'CREW_OPTIONS',
+      TOPLEVEL_BINDING
-      'CREW_PACKAGES_PATH',
+      URI
-      'CREW_PREFIX',
-      'CREW_TGT',
-      'CREW_VERSION',
-      'HOME',
-      'LIBC_VERSION',
-      'USER'
    ]
-    vars.each { |var|
+    # Get all constants
-      value = eval(var)
+    @constants = Module.constants.select {|e| e =~ /[[:upper:]]$/}
+    # Reject all constants which match the default list
+    @constants = @constants.map(&:to_s).reject{ |e| @ruby_default_constants.find{ |f| /\A#{e}\z/ =~ f }}
+    # Print a sorted list of the remaining constants used by crew.
+    @constants.sort.each { |var|
+      value = eval(var.to_s)
      puts "#{var}=#{value}"
    }
  end

--- a/lib/const.rb
+++ b/lib/const.rb
 # Defines common constants used in different parts of crew
-CREW_VERSION = '1.10.3'
+CREW_VERSION = '1.10.4'
 ARCH_ACTUAL = `uname -m`.strip
 # This helps with virtualized builds on aarch64 machines