Mercurial Hosting > luan
annotate src/luan/modules/PackageLuan.java @ 1280:781ec0a92bb5
add Boot.luan
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Thu, 20 Dec 2018 13:38:16 -0700 |
parents | 9fa8b8389578 |
children | 503bde9a7c80 |
rev | line source |
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167
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merge luan/lib into modules
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1 package luan.modules; |
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2 |
1280 | 3 import java.io.Reader; |
4 import java.io.InputStreamReader; | |
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5 import java.io.IOException; |
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6 import java.util.Arrays; |
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7 import java.util.Collections; |
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8 import luan.Luan; |
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9 import luan.LuanState; |
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10 import luan.LuanTable; |
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11 import luan.LuanFunction; |
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12 import luan.LuanJavaFunction; |
798 | 13 import luan.LuanCloner; |
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14 import luan.LuanException; |
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15 |
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16 |
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17 public final class PackageLuan { |
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18 |
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19 public static final LuanFunction requireFn; |
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20 static { |
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21 try { |
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22 requireFn = new LuanJavaFunction(PackageLuan.class.getMethod("require",LuanState.class,String.class),null); |
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23 } catch(NoSuchMethodException e) { |
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24 throw new RuntimeException(e); |
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25 } |
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26 } |
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27 |
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28 public static LuanTable loaded(LuanState luan) { |
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29 LuanTable tbl = (LuanTable)luan.registry().get("Package.loaded"); |
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30 if( tbl == null ) { |
1267 | 31 tbl = new LuanTable(luan); |
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32 luan.registry().put("Package.loaded",tbl); |
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33 } |
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34 return tbl; |
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35 } |
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36 |
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37 public static Object require(LuanState luan,String modName) throws LuanException { |
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38 Object mod = load(luan,modName); |
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39 if( mod.equals(Boolean.FALSE) ) |
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40 throw new LuanException( "module '"+modName+"' not found" ); |
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41 return mod; |
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42 } |
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43 |
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44 public static Object load(LuanState luan,String modName) throws LuanException { |
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45 LuanTable loaded = loaded(luan); |
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46 Object mod = loaded.rawGet(modName); |
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47 if( mod == null ) { |
1280 | 48 if( modName.equals("luan:Boot.luan") ) { |
49 String src; | |
50 try { | |
51 Reader in = new InputStreamReader(ClassLoader.getSystemResourceAsStream("luan/modules/Boot.luan")); | |
52 src = Utils.readAll(in); | |
53 in.close(); | |
54 } catch(IOException e) { | |
55 throw new RuntimeException(e); | |
56 } | |
57 LuanFunction loader = Luan.load(src,modName); | |
58 mod = Luan.first( | |
59 loader.call(luan,new Object[]{modName}) | |
60 ); | |
61 if( mod == null ) | |
62 throw new RuntimeException(); | |
63 } else if( modName.startsWith("java:") ) { | |
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64 mod = JavaLuan.load(luan,modName.substring(5)); |
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65 if( mod == null ) |
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66 mod = Boolean.FALSE; |
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67 } else { |
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68 String src = read(luan,modName); |
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69 if( src == null ) { |
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70 mod = Boolean.FALSE; |
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71 } else { |
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72 LuanFunction loader = Luan.load(src,modName); |
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73 mod = Luan.first( |
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74 loader.call(luan,new Object[]{modName}) |
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75 ); |
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76 if( mod == null ) { |
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77 mod = loaded.rawGet(modName); |
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78 if( mod != null ) |
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79 return mod; |
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80 throw new LuanException( "module '"+modName+"' returned nil" ); |
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81 } |
503 | 82 } |
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83 } |
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84 loaded.rawPut(modName,mod); |
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85 } |
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86 return mod; |
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87 } |
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88 |
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89 static String read(LuanState luan,String uri) throws LuanException { |
1280 | 90 LuanTable boot = (LuanTable)PackageLuan.require(luan,"luan:Boot.luan"); |
91 LuanFunction read = (LuanFunction)boot.get("read"); | |
92 return (String)Luan.first(read.call(luan,new Object[]{uri})); | |
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93 } |
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94 |
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95 public static void enableLoad(LuanState luan,String... mods) throws LuanException { |
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96 if( !luan.isLocked ) |
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97 return; |
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98 LuanTable loaded = loaded(luan); |
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99 for( String mod : mods ) { |
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100 if( loaded.rawGet(mod) == null ) { |
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101 luan.isLocked = false; |
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102 luan.deepenClone(luan,new LuanCloner(LuanCloner.Type.COMPLETE)); |
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103 break; |
798 | 104 } |
105 } | |
106 } | |
107 | |
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108 } |