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johanjohan
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A little Rakefile to generate QuickJSON/quicklookjson.c from readable source.
1 parent e4727ab commit 52f59db

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‎Rakefile‎

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require 'etc'
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require 'json'
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require 'hpricot'
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require 'shellwords'
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SubstVars = %w(DEV_MODE VERSION GIT_HASH HTML_HEADER HTML_FOOTER)
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#ENV['VERSION'] = IO.read('VERSION').chomp
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ENV["GIT_HASH"] = IO.popen("git log --format=%H -n 1") { |f| f.gets.chomp }
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# not used yet
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#if ENV['DEV'] then
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# ENV['DEV_MODE'] ||= 'true'
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#else
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# ENV['DEV_MODE'] ||= 'false'
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#end
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task :default => 'QuickJSON/quicklookjson.c'
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desc 'build everything'
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task :all => %w(
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QuickJSON/quicklookjson.c
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)
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desc 'cleanup'
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task :clean do |t|
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#verbose(true) { rm_rf FileList['build/*'] }
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end
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desc 'Generates the quicklook source code from the test web page.'
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file 'QuickJSON/quicklookjson.c' => FileList['json-viewer/quicklook.*'] do |t|
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announce t
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# fetch the html, inlining and minifying <script> tags we find
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cd 'json-viewer' do
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quicklook_html = IO.read('quicklook.html')
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dom = Hpricot.parse(quicklook_html)
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dom.search('script[@src]').each do |script|
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src = script.attributes['src']
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script.remove_attribute('src')
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script.inner_html =
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IO.popen("../bin/jsmin #{Shellwords.escape(src)}") do |stdout|
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stdout.read.gsub(/\n/, ' ')
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end
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end
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# next, grab the leading and trailing portions and escape them to C strings
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dom.to_s =~ /\A(.*)__JSON__(.*)\Z/m
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ENV['HTML_HEADER'] = $1.to_json
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ENV['HTML_FOOTER'] = $2.to_json
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end
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# move our C file template into place and perform __MAGIC__ expansion on it
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cp 'json-viewer/quicklook.c', t.name
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write_file t.name
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end
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def announce(task, action = 'building')
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puts "#{action} #{task.name}"
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end
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# edit a file in place, replacing __FOO__ any occurrences with ENV['FOO']
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def write_file(file, str = nil, no_subst = false)
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str = IO.read(file) unless str
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when_writing do
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File.open(file, 'w') {|f| f.write(no_subst ? str : vars_subst(str)) }
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end
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end
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$blabbed = {}
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def vars_subst(str)
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str = str.dup
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for var in SubstVars
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if ENV[var] && str.gsub!("__#{var}__") { ENV[var] } &&
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($blabbed[var] || '') != ENV[var]
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show = truncate_if_longer_than(ENV[var], 70 - var.length)
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puts "#{var} is #{show}"
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$blabbed[var] = ENV[var]
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end
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end
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str
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end
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def truncate_if_longer_than(what, max)
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if (what.size <= max+10) then
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what
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else
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/\A([^\n]{0,20}\b).*?(\b\S[^\n]{0,20})\Z/m.match(what) || # tries to
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/\A([^\n]{0,20}\b).*?(\S[^\n]{0,20})\Z/m.match(what) || # truncate
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/\A([^\n]{0,20}).*?(\b\S[^\n]{0,20})\Z/m.match(what) || # to word
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/\A([^\n]{0,20}).*?(\S[^\n]{0,20})\Z/m.match(what) # boundary
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$1 +
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' ... ' + nice_bytes(what.length - $1.length - $2.length, 2) +
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' ... ' + $2
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end
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end
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# poached from Ramaze::Helper::NiceBytes
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K = 2.0**10
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M = 2.0**20
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G = 2.0**30
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T = 2.0**40
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def nice_bytes(bytes, max_digits=3)
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value, suffix, precision = case bytes
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when 0...K
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[ bytes, 'b', 0 ]
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else
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value, suffix = case bytes
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when K...M : [ bytes / K, 'KiB' ]
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when M...G : [ bytes / M, 'MiB' ]
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when G...T : [ bytes / G, 'GiB' ]
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else [ bytes / T, 'TiB' ]
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end
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used_digits = case value
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when 0...10 : 1
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when 10...100 : 2
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when 100...1000 : 3
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end
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leftover_digits = max_digits - used_digits
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[ value, suffix, leftover_digits > 0 ? leftover_digits : 0 ]
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end
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"%.#{precision}f#{suffix}" % value
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end

‎bin/jsmin‎

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#! /usr/bin/env node
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var jsmin = require('jsmin').jsmin
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, ALL = 3, MOST = 2, KEEP_NL = 1
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, LEVEL = ALL
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, fs = require('fs')
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, _ = require('underscore')
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, files = _.uniq(process.argv.slice(2))
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, count = files.length
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;
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if (files.length)
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load(files.shift());
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function load(fn) {
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fs.readFile(fn, 'utf-8', function gotFile(e, file) {
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if (e) return fail(e, 'loading '+ fn);
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return minify(fn, file);
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});
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}
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function fail(e, when) {
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console.error('jsmin error '+ when +': '+ e);
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process.exit(1 + count - files.length);
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}
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function minify(fn, js) {
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process.stdout.write(jsmin(js, LEVEL));
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done();
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}
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function done(e, fn) {
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if (e)
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fail(e, 'saving '+ fn);
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else if (files.length)
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load(files.shift());
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else
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process.exit(0);
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}

‎json-viewer/quicklook.c‎

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#include "quicklookjson.h"
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#define HTML_HEADER __HTML_HEADER__
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#define HTML_FOOTER __HTML_FOOTER__
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int main(int argc, char* argv[]) {
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if (argc < 2) {
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printf("Usage: quicklookjson <json file>\n");
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return 1;
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}
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CFStringRef path = CFStringCreateWithCString(NULL, argv[1], kCFStringEncodingUTF8);
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CFURLRef url = CFURLCreateWithFileSystemPath(NULL, path, kCFURLPOSIXPathStyle, false);
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CFRelease(path);
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CFDataRef text = createDataFromURL(url);
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CFRelease(url);
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if (!text) {
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printf("File not found.\n");
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return 2;
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}
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CFDataRef result = text;
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CFRelease(text);
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printf("%s", CFDataGetBytePtr(result));
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return 0;
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}
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CFDataRef createHTMLPreview(CFURLRef url)
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{
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CFDataRef text = createDataFromURL(url);
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if (!text) return NULL;
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CFDataRef result = createHTMLData(text);
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CFRelease(text);
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return result;
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}
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CFDataRef createDataFromURL(CFURLRef url)
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{
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SInt32 errorCode = 0;
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CFDataRef fileContent;
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CFDictionaryRef dict;
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CFArrayRef arr = CFArrayCreate(NULL, NULL, 0, NULL);
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Boolean success = CFURLCreateDataAndPropertiesFromResource (NULL,
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url,
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&fileContent,
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&dict,
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arr,
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&errorCode);
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CFRelease(arr);
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CFRelease(dict);
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if (!success) {
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return NULL;
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}
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return fileContent;
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}
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CFDataRef createHTMLData(CFDataRef json)
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{
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CFMutableDataRef html = CFDataCreateMutable(NULL, 0);
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CFDataAppendBytes(html, (const UInt8*) HTML_HEADER, sizeof(HTML_HEADER));
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CFDataAppendBytes(html, CFDataGetBytePtr(json), CFDataGetLength(json));
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CFDataAppendBytes(html, (const UInt8*) HTML_FOOTER, sizeof(HTML_FOOTER));
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return html;
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}

‎json-viewer/quicklook.html‎

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<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<script src="quicklook.js"></script>
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</head>
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<body onload="init()">
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<script id="json" type="application/json">
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__JSON__
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</script>
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</body>
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</html>

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