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|
package codegen
import (
"fmt"
"go/build"
"sort"
"strconv"
"strings"
)
// These imports are referenced by the generated code, and are assumed to have the
// default alias. So lets make sure they get added first, and any later collisions get
// renamed.
var ambientImports = []string{
"context",
"fmt",
"io",
"strconv",
"time",
"sync",
"github.com/vektah/gqlgen/neelance/introspection",
"github.com/vektah/gqlgen/neelance/errors",
"github.com/vektah/gqlgen/neelance/query",
"github.com/vektah/gqlgen/neelance/schema",
"github.com/vektah/gqlgen/neelance/validation",
"github.com/vektah/gqlgen/graphql",
}
func buildImports(types NamedTypes, destDir string) *Imports {
imports := Imports{
destDir: destDir,
}
for _, ambient := range ambientImports {
imports.add(ambient)
}
// Imports from top level user types
for _, t := range types {
t.Import = imports.add(t.Package)
}
return &imports
}
func (s *Imports) add(path string) *Import {
if path == "" {
return nil
}
if stringHasSuffixFold(s.destDir, path) {
return nil
}
if existing := s.findByPath(path); existing != nil {
return existing
}
pkg, err := build.Default.Import(path, s.destDir, 0)
if err != nil {
panic(err)
}
imp := &Import{
Name: pkg.Name,
Path: path,
}
s.imports = append(s.imports, imp)
return imp
}
func stringHasSuffixFold(s, suffix string) bool {
return len(s) >= len(suffix) && strings.EqualFold(s[len(s)-len(suffix):], suffix)
}
func (s Imports) finalize() []*Import {
// ensure stable ordering by sorting
sort.Slice(s.imports, func(i, j int) bool {
return s.imports[i].Path > s.imports[j].Path
})
for _, imp := range s.imports {
alias := imp.Name
i := 1
for s.findByAlias(alias) != nil {
alias = imp.Name + strconv.Itoa(i)
i++
if i > 10 {
panic(fmt.Errorf("too many collisions, last attempt was %s", alias))
}
}
imp.alias = alias
}
return s.imports
}
func (s Imports) findByPath(importPath string) *Import {
for _, imp := range s.imports {
if imp.Path == importPath {
return imp
}
}
return nil
}
func (s Imports) findByAlias(alias string) *Import {
for _, imp := range s.imports {
if imp.alias == alias {
return imp
}
}
return nil
}
|
