/
common.go
141 lines (125 loc) · 2.91 KB
/
common.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
package irgen
import (
"fmt"
"github.com/ncbray/compilerutil/fs"
"github.com/ncbray/compilerutil/writer"
"go/format"
"os"
"path/filepath"
"strings"
)
func isZeroValue(v interface{}) bool {
switch v := v.(type) {
case bool:
return !v
case int:
return v == 0
case string:
return v == ""
default:
return v == nil
}
}
func dirExists(path string) bool {
_, err := os.Stat(path)
return !os.IsNotExist(err)
}
func formatGoFile(src fs.DataInput, dst fs.DataOutput) error {
data, err := src.GetBytes()
if err != nil {
return err
}
data, err = format.Source(data)
if err != nil {
return err
}
return dst.SetBytes(data)
}
func writeHeader(packageName string, sourceFile string, out *writer.TabbedWriter) {
out.WriteLine("package " + packageName)
out.EndOfLine()
out.WriteLine(fmt.Sprintf("/* Generated from %s, do not edit by hand. */", sourceFile))
}
func extractPackageName(filename string) string {
parts := strings.Split(filename, "/")
return parts[len(parts)-2]
}
func writeImports(imports []string, out *writer.TabbedWriter) {
if len(imports) > 0 {
out.WriteLine("import (")
out.Indent()
for _, imp := range imports {
out.WriteLine(fmt.Sprintf("%#v", imp))
}
out.Dedent()
out.WriteLine(")")
}
}
type Declarations struct {
DataSource string
Package string
File string
Enums []*EnumDecl
Trees []*TreeDecl
Nodes []*NodeDecl
Parents []*ParentRelationshipDecl
Counted []*CountedRelationshipDecl
}
func processDeclaration(decl *Declarations, output_dir string, fsys fs.FileSystem) {
package_dir := filepath.Join(output_dir, decl.Package)
if !dirExists(package_dir) {
panic(package_dir)
}
outfile := filepath.Join(package_dir, decl.File)
//fmt.Println("generating:", filepath.Join(decl.Package, decl.File))
t := fsys.TempFile()
tw, err := t.GetWriter()
if err != nil {
panic(err)
}
defer tw.Close()
out := writer.MakeTabbedWriter("\t", tw)
packageName := extractPackageName(outfile)
writeHeader(packageName, decl.DataSource, out)
imports := map[string]bool{}
for _, e := range decl.Enums {
getEnumImports(e, imports)
}
for _, t := range decl.Trees {
getTreeImports(t, imports)
}
if len(decl.Nodes) > 0 {
getNodeImports(decl.Nodes, imports)
}
if len(imports) > 0 {
importList := make([]string, len(imports))
i := 0
for k, _ := range imports {
importList[i] = k
i++
}
out.EndOfLine()
writeImports(importList, out)
}
for _, e := range decl.Enums {
out.EndOfLine()
generateEnum(e, out)
}
for _, t := range decl.Trees {
out.EndOfLine()
generateTree(t, out)
}
if len(decl.Nodes) > 0 {
generateGraph(decl.Nodes, decl.Parents, decl.Counted, out)
}
tw.Close()
err = formatGoFile(t, fsys.OutputFile(outfile, 0640))
if err != nil {
panic(err)
}
}
func ProcessDeclarations(decls []*Declarations, output_dir string, fsys fs.FileSystem) {
for _, decl := range decls {
processDeclaration(decl, output_dir, fsys)
}
}