linux/kernel/manual-config: Greatly simplify config parser

This commit is contained in:
Shea Levy 2012-07-29 15:54:31 -04:00
parent 9e334221fc
commit da4c64026a
2 changed files with 9 additions and 62 deletions

View file

@ -1,4 +1,4 @@
{ stdenv, runCommand, nettools, perl, kmod, writeTextFile, coffeescript }:
{ stdenv, runCommand, nettools, perl, kmod, writeTextFile }:
with stdenv.lib;
@ -7,66 +7,14 @@ let
# Function to parse the config file to get the features supported
readFeatures = config:
let
configParser = writeTextFile { name = "config-parser"; executable=true; text = ''
#!${coffeescript}/bin/coffee
fs = require "fs"
events = require "events"
lineEmitter = new events.EventEmitter()
buffer = new Buffer 0
input = fs.createReadStream process.argv[2]
input.on 'data', (data) ->
nextBuffer = new Buffer buffer.length + data.length
buffer.copy(nextBuffer)
data.copy(nextBuffer, buffer.length)
start = 0
offset = buffer.length
buffer = nextBuffer
for i in [1..data.length]
if data[i] == '\n'.charCodeAt 0
end = i+offset+1
line = buffer.slice start, end - 1
start = end
lineEmitter.emit "line", line.toString()
buffer = buffer.slice start
input.once 'end', ->
input.destroy()
if safeToWrite
output.end "}"
output.destroySoon()
else
output.once 'drain', ->
output.end "}"
output.destroySoon()
output = fs.createWriteStream process.env["out"]
output.setMaxListeners 0
safeToWrite = output.write "{\n"
unless safeToWrite
output.once 'drain', ->
safeToWrite = true
escapeNixString = (str) ->
str.replace("'''", "''''").replace("''${", "'''''${")
lineEmitter.on 'line', (line) ->
unless line.length is 0 or line.charAt(0) is '#'
split = line.split '='
name = split[0].substring "CONFIG_".length
value = escapeNixString split.slice(1).join ""
lineToWrite = "\"#{name}\" = '''#{value}''';\n"
if safeToWrite
safeToWrite = output.write lineToWrite
else
input.pause()
output.once 'drain', ->
safeToWrite = output.write lineToWrite
input.resume()
'';};
configAttrs = import "${runCommand "attrList.nix" {} "${configParser} ${config}"}";
configAttrs = import "${runCommand "attrList.nix" {} ''
grep -E -v '(^#|^$)' < ${config} | \
sed 's/CONFIG_// ; s/=/ /' | \
awk \
'BEGIN { print "{" }
END { print "}" }
{ printf "\"%s\" = '"'''"'%s'"'''"';\n", $1, $2 }' > $out
''}";
getValue = option:
if hasAttr option configAttrs then getAttr option configAttrs else null;

View file

@ -5859,7 +5859,6 @@ let
# A function to build a manually-configured kernel
linuxManualConfig = import ../os-specific/linux/kernel/manual-config.nix {
inherit (pkgs) stdenv runCommand nettools perl kmod writeTextFile;
coffeescript = pkgs.nodePackages."coffee-script";
};
keyutils = callPackage ../os-specific/linux/keyutils { };