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annotate src/dil/ModuleManager.d @ 812:3b567bce56f3

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Forgot to really add dil.ModuleManager.
author Aziz K?ksal <aziz.koeksal@gmail.com>
date Tue, 11 Mar 2008 17:23:30 +0100
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children 1abffc396594
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Aziz K?ksal <aziz.koeksal@gmail.com>
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1 /++
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2 Author: Aziz Köksal
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3 License: GPL3
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4 +/
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5 module dil.ModuleManager;
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6
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7 import dil.semantic.Module;
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8 import dil.Information;
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9 import common;
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10
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11 import tango.io.FilePath;
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12
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13 /// Manages loaded modules in a table.
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14 class ModuleManager
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15 {
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16 /// Maps FQN paths to modules. E.g.: dil/ast/Node
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17 Module[string] modulesTable;
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18 Module[] loadedModules; /// Loaded modules in sequential order.
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19 string[] importPaths; /// Where to look for module files.
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20 InfoManager infoMan;
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21
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22 /// Constructs a ModuleManager object.
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23 this(string[] importPaths, InfoManager infoMan)
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24 {
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25 this.importPaths = importPaths;
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26 this.infoMan = infoMan;
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27 }
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28
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29 /// Loads a module given a file path.
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30 Module loadModuleFile(string moduleFilePath)
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31 {
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32 auto modul = new Module(moduleFilePath, infoMan);
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33 modul.parse();
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34 auto moduleFQNPath = modul.getFQNPath();
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35 // Return the module if it's in the table already.
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36 // This can happen if the module file path has been defined
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37 // more than once on the command line.
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38 if (auto existingModule = moduleFQNPath in modulesTable)
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39 {
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40 // TODO: avoid parsing the module in the first place, by
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41 // using another table mapping absolute file paths
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42 // to modules.
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43 delete modul;
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44 return *existingModule;
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45 }
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46 // Insert new module.
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47 modulesTable[moduleFQNPath] = modul;
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48 loadedModules ~= modul;
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49 return modul;
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50 }
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51
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52 /// Loads a module given an FQN path.
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53 Module loadModule(string moduleFQNPath)
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54 {
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55 // Look up in table if the module is already loaded.
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56 Module* pmodul = moduleFQNPath in modulesTable;
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57 if (pmodul)
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58 return *pmodul;
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59 // Locate the module in the file system.
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60 auto moduleFilePath = findModuleFilePath(moduleFQNPath,
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61 importPaths);
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62 if (moduleFilePath.length)
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63 return loadModuleFile(moduleFilePath);
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64 return null;
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65 }
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66
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67 /// Searches for a module in the file system looking in importPaths.
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68 /// Returns: the file path to the module, or null if it wasn't found.
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69 static string findModuleFilePath(string moduleFQNPath, string[] importPaths)
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70 {
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71 auto filePath = new FilePath();
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72 foreach (importPath; importPaths)
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73 {
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74 filePath.set(importPath);
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75 filePath.append(moduleFQNPath);
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76 foreach (moduleSuffix; [".d", ".di"/*interface file*/])
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77 {
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78 filePath.suffix(moduleSuffix);
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79 if (filePath.exists())
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80 return filePath.toString();
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81 }
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82 }
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83 return null;
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84 }
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85 }