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| 1 /// | |
| 2 /// Script to create boilerplate for a Polymer element. | |
| 3 /// Produces new .html entry point for a polymer app and updates the | |
| 4 /// pubspec.yaml to reflect it. | |
| 5 /// | |
| 6 /// Run this script with pub run: | |
| 7 /// | |
| 8 /// pub run polymer:new_entry <html_file> | |
| 9 /// | |
| 10 import 'dart:io'; | |
| 11 import 'package:args/args.dart'; | |
| 12 import 'package:path/path.dart' as path; | |
| 13 import 'package:yaml/yaml.dart'; | |
| 14 import 'package:source_span/source_span.dart'; | |
| 15 | |
| 16 void printUsage() { | |
| 17 print('pub run polymer:new_entry entry_point_file.html'); | |
| 18 } | |
| 19 | |
| 20 void main(List<String> args) { | |
| 21 var parser = new ArgParser(allowTrailingOptions: true); | |
| 22 parser.addFlag('help', abbr: 'h'); | |
| 23 var entryPoint; | |
| 24 | |
| 25 try { | |
| 26 var options = parser.parse(args); | |
| 27 if (options['help']) { | |
| 28 printUsage(); | |
| 29 return; | |
| 30 } | |
| 31 entryPoint = options.rest[0]; | |
| 32 } catch(e) { | |
| 33 print('$e\n'); | |
| 34 printUsage(); | |
| 35 exitCode = 1; | |
| 36 return; | |
| 37 } | |
| 38 | |
| 39 // If the entrypoint file has no extension, add .html to it. | |
| 40 if (path.extension(entryPoint) == '') { | |
| 41 entryPoint = '${entryPoint}.html'; | |
| 42 } | |
| 43 | |
| 44 var outputDir = path.dirname(entryPoint); | |
| 45 var outputDirLocation = new Directory(outputDir); | |
| 46 | |
| 47 if (!outputDirLocation.existsSync()) { | |
| 48 outputDirLocation.createSync(recursive: true); | |
| 49 } | |
| 50 | |
| 51 outputDir = outputDirLocation.resolveSymbolicLinksSync(); | |
| 52 var pubspecDir = _findDirWithFile(outputDir, 'pubspec.yaml'); | |
| 53 | |
| 54 if (pubspecDir == null) { | |
| 55 print('Could not find pubspec.yaml when walking up from $outputDir'); | |
| 56 exitCode = 1; | |
| 57 return; | |
| 58 } | |
| 59 | |
| 60 var relativeEntryPoint = path.relative( | |
| 61 path.join(outputDir, path.basename(entryPoint)), from: pubspecDir); | |
| 62 | |
| 63 try { | |
| 64 if (_createBoilerPlate(relativeEntryPoint, pubspecDir)) { | |
| 65 print('Added $entryPoint to ${path.join(pubspecDir, "pubspec.yaml")}'); | |
| 66 } | |
| 67 print('Successfully created:'); | |
| 68 print(' ' + path.join(pubspecDir, entryPoint)); | |
| 69 } catch(e, t) { | |
| 70 print('Exception: $e\n$t'); | |
| 71 print('Error creating files in $outputDir'); | |
| 72 exitCode = 1; | |
| 73 } | |
| 74 | |
| 75 return; | |
| 76 } | |
| 77 | |
| 78 String _findDirWithFile(String dir, String filename) { | |
| 79 while (!new File(path.join(dir, filename)).existsSync()) { | |
| 80 var parentDir = path.dirname(dir); | |
| 81 // If we reached root and failed to find it, bail. | |
| 82 if (parentDir == dir) return null; | |
| 83 dir = parentDir; | |
| 84 } | |
| 85 return dir; | |
| 86 } | |
| 87 | |
| 88 // Returns true if the pubspec file was modified. It might not be modified if | |
| 89 // there was a monolithic polymer transformer in the pubspec, or if the entry | |
| 90 // point for some reason already existed in the pubspec. | |
| 91 bool _createBoilerPlate(String entryPoint, String pubspecDir) { | |
| 92 | |
| 93 String html = ''' | |
| 94 <!doctype html> | |
| 95 <html> | |
| 96 <head> | |
| 97 <!-- link rel="import" href="path_to_html_import.html" --> | |
| 98 </head> | |
| 99 <body> | |
| 100 <!-- HTML for body here --> | |
| 101 <script type="application/dart">export 'package:polymer/init.dart';</script> | |
| 102 </body> | |
| 103 </html> | |
| 104 '''; | |
| 105 | |
| 106 new File(path.join(pubspecDir, entryPoint)).writeAsStringSync(html); | |
| 107 | |
| 108 var pubspecPath = path.join(pubspecDir, 'pubspec.yaml'); | |
| 109 var pubspecText = new File(pubspecPath).readAsStringSync(); | |
| 110 var transformers = loadYaml(pubspecText)['transformers']; | |
| 111 var entryPoints; | |
| 112 | |
| 113 var insertionPoint; | |
| 114 var textToInsert = ''; | |
| 115 | |
| 116 if (transformers != null) { | |
| 117 // If there are transformers in the pubspec, look for the polymer | |
| 118 // transformers, get the entry points, and delete the old entry points. | |
| 119 SourceSpan transformersSourceSpan = transformers.span; | |
| 120 | |
| 121 SourceSpan polymerTransformerSourceSpan; | |
| 122 SourceSpan entryPointsSourceSpan; | |
| 123 for (var e in transformers) { | |
| 124 if (e == 'polymer') { | |
| 125 // If they had an empty polymer transformer, just get rid of it (we will | |
| 126 // replace it with our own map style one). | |
| 127 var polymerRegex = new RegExp(r'\n\s*-\spolymer\s*'); | |
| 128 // Insert right after the newline. | |
| 129 insertionPoint = pubspecText.indexOf(polymerRegex) + 1; | |
| 130 pubspecText = pubspecText.replaceFirst(polymerRegex, '\n'); | |
| 131 } else if (e is YamlMap && e['polymer'] != null) { | |
| 132 polymerTransformerSourceSpan = e['polymer'].span; | |
| 133 | |
| 134 var existing = e['polymer']['entry_points']; | |
| 135 if (existing == null && e['polymer'].containsKey('entry_points')) { | |
| 136 if (path.split(entryPoint)[0] != 'web') { | |
| 137 print('WARNING: Did not add entry_point $entryPoint to pubspec.yaml' | |
| 138 ' because of existing empty `entry_points` field in polymer' | |
| 139 ' transformer. This defaults to treating all files under `web/`' | |
| 140 ' as entry points, but you tried to add an entry point outside of' | |
| 141 ' the `web/` folder. You will need to explicitly list all entry' | |
| 142 ' points that you care about into your pubspec in order to' | |
| 143 ' include any outside of `web/`.'); | |
| 144 } | |
| 145 return false; | |
| 146 } | |
| 147 entryPoints = (existing == null ? [] : | |
| 148 (existing is String ? [existing] : existing.toList())); | |
| 149 | |
| 150 if (entryPoints.contains(entryPoint)) return false; | |
| 151 entryPoints.add(entryPoint); | |
| 152 | |
| 153 if (existing != null) { | |
| 154 entryPointsSourceSpan = existing.span; | |
| 155 } | |
| 156 } | |
| 157 } | |
| 158 | |
| 159 if (polymerTransformerSourceSpan == null) { | |
| 160 if (insertionPoint == null) { | |
| 161 insertionPoint = transformersSourceSpan.start.offset; | |
| 162 } | |
| 163 textToInsert = '- polymer:\n entry_points:\n'; | |
| 164 } else if (entryPointsSourceSpan == null) { | |
| 165 insertionPoint = polymerTransformerSourceSpan.start.offset; | |
| 166 textToInsert = ' entry_points:\n'; | |
| 167 } else { | |
| 168 insertionPoint = entryPointsSourceSpan.start.offset; | |
| 169 pubspecText = '${pubspecText.substring(0, insertionPoint)}' | |
| 170 '${pubspecText.substring(entryPointsSourceSpan.end.offset)}'; | |
| 171 } | |
| 172 } else { | |
| 173 // There were no transformers at all. | |
| 174 insertionPoint = pubspecText.length; | |
| 175 var optionalNewline = pubspecText.endsWith('\n') ? '' : '\n'; | |
| 176 textToInsert = ''' | |
| 177 ${optionalNewline}transformers: | |
| 178 - polymer: | |
| 179 entry_points: | |
| 180 '''; | |
| 181 entryPoints = [entryPoint]; | |
| 182 } | |
| 183 | |
| 184 if (entryPoints == null) entryPoints = [entryPoint]; | |
| 185 // TODO(dgrove): Once dartbug.com/20409 is addressed, use that here. | |
| 186 var entryPointsText = entryPoints.map((e) => ' - $e').join('\n'); | |
| 187 | |
| 188 textToInsert += entryPointsText; | |
| 189 if (insertionPoint == pubspecText.length) { | |
| 190 pubspecText = '${pubspecText}${textToInsert}'; | |
| 191 } else { | |
| 192 pubspecText = '${pubspecText.substring(0, insertionPoint)}' | |
| 193 '${textToInsert}\n${pubspecText.substring(insertionPoint)}'; | |
| 194 } | |
| 195 | |
| 196 _writePubspec(pubspecPath, pubspecText); | |
| 197 return true; | |
| 198 } | |
| 199 | |
| 200 _writePubspec(String pubspecPath, String text) { | |
| 201 new File(pubspecPath).writeAsStringSync(text); | |
| 202 } | |
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Chromium Code Reviews
Issue 794473002:
Delete polymer from the Dart repo (Closed)
Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart