|
| 1 | +package compiler |
| 2 | + |
| 3 | +import ( |
| 4 | + "bytes" |
| 5 | + "go/ast" |
| 6 | + "go/build" |
| 7 | + "go/parser" |
| 8 | + "go/token" |
| 9 | + "go/types" |
| 10 | + "testing" |
| 11 | + |
| 12 | + "fmt" |
| 13 | + |
| 14 | + "github.com/sergi/go-diff/diffmatchpatch" |
| 15 | + "golang.org/x/tools/go/loader" |
| 16 | +) |
| 17 | + |
| 18 | +func TestOrder(t *testing.T) { |
| 19 | + fileA := ` |
| 20 | +package foo |
| 21 | +
|
| 22 | +var Avar = "a" |
| 23 | +
|
| 24 | +type Atype struct{} |
| 25 | +
|
| 26 | +func Afunc() int { |
| 27 | + var varA = 1 |
| 28 | + var varB = 2 |
| 29 | + return varA+varB |
| 30 | +} |
| 31 | +` |
| 32 | + |
| 33 | + fileB := ` |
| 34 | +package foo |
| 35 | +
|
| 36 | +var Bvar = "b" |
| 37 | +
|
| 38 | +type Btype struct{} |
| 39 | +
|
| 40 | +func Bfunc() int { |
| 41 | + var varA = 1 |
| 42 | + var varB = 2 |
| 43 | + return varA+varB |
| 44 | +} |
| 45 | +` |
| 46 | + files := []source{{"fileA.go", []byte(fileA)}, {"fileB.go", []byte(fileB)}} |
| 47 | + |
| 48 | + compare(t, "foo", files, false) |
| 49 | + compare(t, "foo", files, true) |
| 50 | + |
| 51 | +} |
| 52 | + |
| 53 | +func compare(t *testing.T, path string, sourceFiles []source, minify bool) { |
| 54 | + outputNormal, err := compile(path, sourceFiles, minify) |
| 55 | + if err != nil { |
| 56 | + t.Fatal(err) |
| 57 | + } |
| 58 | + |
| 59 | + // reverse the array |
| 60 | + for i, j := 0, len(sourceFiles)-1; i < j; i, j = i+1, j-1 { |
| 61 | + sourceFiles[i], sourceFiles[j] = sourceFiles[j], sourceFiles[i] |
| 62 | + } |
| 63 | + |
| 64 | + outputReversed, err := compile(path, sourceFiles, minify) |
| 65 | + if err != nil { |
| 66 | + t.Fatal(err) |
| 67 | + } |
| 68 | + |
| 69 | + if string(outputNormal) != string(outputReversed) { |
| 70 | + dmp := diffmatchpatch.New() |
| 71 | + diffs := dmp.DiffMain(string(outputNormal), string(outputReversed), true) |
| 72 | + fmt.Println(dmp.DiffPrettyText(diffs)) |
| 73 | + t.Fatal("files in different order produces differens JS") |
| 74 | + } |
| 75 | +} |
| 76 | + |
| 77 | +type source struct { |
| 78 | + name string |
| 79 | + contents []byte |
| 80 | +} |
| 81 | + |
| 82 | +func compile(path string, sourceFiles []source, minify bool) ([]byte, error) { |
| 83 | + |
| 84 | + conf := loader.Config{} |
| 85 | + conf.Fset = token.NewFileSet() |
| 86 | + conf.ParserMode = parser.ParseComments |
| 87 | + |
| 88 | + context := build.Default // make a copy of build.Default |
| 89 | + conf.Build = &context |
| 90 | + conf.Build.BuildTags = []string{"js"} |
| 91 | + |
| 92 | + var astFiles []*ast.File |
| 93 | + for _, sourceFile := range sourceFiles { |
| 94 | + astFile, err := parser.ParseFile(conf.Fset, sourceFile.name, sourceFile.contents, parser.ParseComments) |
| 95 | + if err != nil { |
| 96 | + return nil, err |
| 97 | + } |
| 98 | + astFiles = append(astFiles, astFile) |
| 99 | + } |
| 100 | + conf.CreateFromFiles(path, astFiles...) |
| 101 | + prog, err := conf.Load() |
| 102 | + if err != nil { |
| 103 | + return nil, err |
| 104 | + } |
| 105 | + |
| 106 | + archiveCache := map[string]*Archive{} |
| 107 | + var importContext *ImportContext |
| 108 | + importContext = &ImportContext{ |
| 109 | + Packages: make(map[string]*types.Package), |
| 110 | + Import: func(path string) (*Archive, error) { |
| 111 | + |
| 112 | + // find in local cache |
| 113 | + if a, ok := archiveCache[path]; ok { |
| 114 | + return a, nil |
| 115 | + } |
| 116 | + |
| 117 | + pi := prog.Package(path) |
| 118 | + importContext.Packages[path] = pi.Pkg |
| 119 | + |
| 120 | + // compile package |
| 121 | + a, err := Compile(path, pi.Files, prog.Fset, importContext, minify) |
| 122 | + if err != nil { |
| 123 | + return nil, err |
| 124 | + } |
| 125 | + archiveCache[path] = a |
| 126 | + return a, nil |
| 127 | + }, |
| 128 | + } |
| 129 | + |
| 130 | + a, err := importContext.Import(path) |
| 131 | + if err != nil { |
| 132 | + return nil, err |
| 133 | + } |
| 134 | + b, err := renderPackage(a) |
| 135 | + if err != nil { |
| 136 | + return nil, err |
| 137 | + } |
| 138 | + return b, nil |
| 139 | +} |
| 140 | + |
| 141 | +func renderPackage(archive *Archive) ([]byte, error) { |
| 142 | + |
| 143 | + selection := make(map[*Decl]struct{}) |
| 144 | + for _, d := range archive.Declarations { |
| 145 | + selection[d] = struct{}{} |
| 146 | + } |
| 147 | + |
| 148 | + buf := &bytes.Buffer{} |
| 149 | + |
| 150 | + if err := WritePkgCode(archive, selection, false, &SourceMapFilter{Writer: buf}); err != nil { |
| 151 | + return nil, err |
| 152 | + } |
| 153 | + |
| 154 | + return buf.Bytes(), nil |
| 155 | +} |
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