aboutsummaryrefslogtreecommitdiffstats
path: root/vendor/github.com/99designs/gqlgen/codegen/config/config.go
blob: 0c72420e60255f7d094bef33e4f1bb31918a8a59 (plain) (blame)
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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
package config

import (
	"fmt"
	"go/types"
	"io/ioutil"
	"os"
	"path/filepath"
	"sort"
	"strings"

	"github.com/99designs/gqlgen/internal/code"
	"github.com/pkg/errors"
	"github.com/vektah/gqlparser"
	"github.com/vektah/gqlparser/ast"
	yaml "gopkg.in/yaml.v2"
)

type Config struct {
	SchemaFilename StringList    `yaml:"schema,omitempty"`
	Exec           PackageConfig `yaml:"exec"`
	Model          PackageConfig `yaml:"model"`
	Resolver       PackageConfig `yaml:"resolver,omitempty"`
	Models         TypeMap       `yaml:"models,omitempty"`
	StructTag      string        `yaml:"struct_tag,omitempty"`
}

var cfgFilenames = []string{".gqlgen.yml", "gqlgen.yml", "gqlgen.yaml"}

// DefaultConfig creates a copy of the default config
func DefaultConfig() *Config {
	return &Config{
		SchemaFilename: StringList{"schema.graphql"},
		Model:          PackageConfig{Filename: "models_gen.go"},
		Exec:           PackageConfig{Filename: "generated.go"},
	}
}

// LoadConfigFromDefaultLocations looks for a config file in the current directory, and all parent directories
// walking up the tree. The closest config file will be returned.
func LoadConfigFromDefaultLocations() (*Config, error) {
	cfgFile, err := findCfg()
	if err != nil {
		return nil, err
	}

	err = os.Chdir(filepath.Dir(cfgFile))
	if err != nil {
		return nil, errors.Wrap(err, "unable to enter config dir")
	}
	return LoadConfig(cfgFile)
}

// LoadConfig reads the gqlgen.yml config file
func LoadConfig(filename string) (*Config, error) {
	config := DefaultConfig()

	b, err := ioutil.ReadFile(filename)
	if err != nil {
		return nil, errors.Wrap(err, "unable to read config")
	}

	if err := yaml.UnmarshalStrict(b, config); err != nil {
		return nil, errors.Wrap(err, "unable to parse config")
	}

	preGlobbing := config.SchemaFilename
	config.SchemaFilename = StringList{}
	for _, f := range preGlobbing {
		matches, err := filepath.Glob(f)
		if err != nil {
			return nil, errors.Wrapf(err, "failed to glob schema filename %s", f)
		}

		for _, m := range matches {
			if config.SchemaFilename.Has(m) {
				continue
			}
			config.SchemaFilename = append(config.SchemaFilename, m)
		}
	}

	return config, nil
}

type PackageConfig struct {
	Filename string `yaml:"filename,omitempty"`
	Package  string `yaml:"package,omitempty"`
	Type     string `yaml:"type,omitempty"`
}

type TypeMapEntry struct {
	Model  StringList              `yaml:"model"`
	Fields map[string]TypeMapField `yaml:"fields,omitempty"`
}

type TypeMapField struct {
	Resolver  bool   `yaml:"resolver"`
	FieldName string `yaml:"fieldName"`
}

type StringList []string

func (a *StringList) UnmarshalYAML(unmarshal func(interface{}) error) error {
	var single string
	err := unmarshal(&single)
	if err == nil {
		*a = []string{single}
		return nil
	}

	var multi []string
	err = unmarshal(&multi)
	if err != nil {
		return err
	}

	*a = multi
	return nil
}

func (a StringList) Has(file string) bool {
	for _, existing := range a {
		if existing == file {
			return true
		}
	}
	return false
}

func (c *PackageConfig) normalize() error {
	if c.Filename == "" {
		return errors.New("Filename is required")
	}
	c.Filename = abs(c.Filename)
	// If Package is not set, first attempt to load the package at the output dir. If that fails
	// fallback to just the base dir name of the output filename.
	if c.Package == "" {
		c.Package = code.NameForPackage(c.ImportPath())
	}

	return nil
}

func (c *PackageConfig) ImportPath() string {
	return code.ImportPathForDir(c.Dir())
}

func (c *PackageConfig) Dir() string {
	return filepath.Dir(c.Filename)
}

func (c *PackageConfig) Check() error {
	if strings.ContainsAny(c.Package, "./\\") {
		return fmt.Errorf("package should be the output package name only, do not include the output filename")
	}
	if c.Filename != "" && !strings.HasSuffix(c.Filename, ".go") {
		return fmt.Errorf("filename should be path to a go source file")
	}

	return c.normalize()
}

func (c *PackageConfig) Pkg() *types.Package {
	return types.NewPackage(c.ImportPath(), c.Dir())
}

func (c *PackageConfig) IsDefined() bool {
	return c.Filename != ""
}

func (c *Config) Check() error {
	if err := c.Models.Check(); err != nil {
		return errors.Wrap(err, "config.models")
	}
	if err := c.Exec.Check(); err != nil {
		return errors.Wrap(err, "config.exec")
	}
	if err := c.Model.Check(); err != nil {
		return errors.Wrap(err, "config.model")
	}
	if c.Resolver.IsDefined() {
		if err := c.Resolver.Check(); err != nil {
			return errors.Wrap(err, "config.resolver")
		}
	}

	// check packages names against conflict, if present in the same dir
	// and check filenames for uniqueness
	packageConfigList := []PackageConfig{
		c.Model,
		c.Exec,
		c.Resolver,
	}
	filesMap := make(map[string]bool)
	pkgConfigsByDir := make(map[string]PackageConfig)
	for _, current := range packageConfigList {
		_, fileFound := filesMap[current.Filename]
		if fileFound {
			return fmt.Errorf("filename %s defined more than once", current.Filename)
		}
		filesMap[current.Filename] = true
		previous, inSameDir := pkgConfigsByDir[current.Dir()]
		if inSameDir && current.Package != previous.Package {
			return fmt.Errorf("filenames %s and %s are in the same directory but have different package definitions", stripPath(current.Filename), stripPath(previous.Filename))
		}
		pkgConfigsByDir[current.Dir()] = current
	}

	return c.normalize()
}

func stripPath(path string) string {
	return filepath.Base(path)
}

type TypeMap map[string]TypeMapEntry

func (tm TypeMap) Exists(typeName string) bool {
	_, ok := tm[typeName]
	return ok
}

func (tm TypeMap) UserDefined(typeName string) bool {
	m, ok := tm[typeName]
	return ok && len(m.Model) > 0
}

func (tm TypeMap) Check() error {
	for typeName, entry := range tm {
		for _, model := range entry.Model {
			if strings.LastIndex(model, ".") < strings.LastIndex(model, "/") {
				return fmt.Errorf("model %s: invalid type specifier \"%s\" - you need to specify a struct to map to", typeName, entry.Model)
			}
		}
	}
	return nil
}

func (tm TypeMap) ReferencedPackages() []string {
	var pkgs []string

	for _, typ := range tm {
		for _, model := range typ.Model {
			if model == "map[string]interface{}" || model == "interface{}" {
				continue
			}
			pkg, _ := code.PkgAndType(model)
			if pkg == "" || inStrSlice(pkgs, pkg) {
				continue
			}
			pkgs = append(pkgs, code.QualifyPackagePath(pkg))
		}
	}

	sort.Slice(pkgs, func(i, j int) bool {
		return pkgs[i] > pkgs[j]
	})
	return pkgs
}

func (tm TypeMap) Add(Name string, goType string) {
	modelCfg := tm[Name]
	modelCfg.Model = append(modelCfg.Model, goType)
	tm[Name] = modelCfg
}

func inStrSlice(haystack []string, needle string) bool {
	for _, v := range haystack {
		if needle == v {
			return true
		}
	}

	return false
}

// findCfg searches for the config file in this directory and all parents up the tree
// looking for the closest match
func findCfg() (string, error) {
	dir, err := os.Getwd()
	if err != nil {
		return "", errors.Wrap(err, "unable to get working dir to findCfg")
	}

	cfg := findCfgInDir(dir)

	for cfg == "" && dir != filepath.Dir(dir) {
		dir = filepath.Dir(dir)
		cfg = findCfgInDir(dir)
	}

	if cfg == "" {
		return "", os.ErrNotExist
	}

	return cfg, nil
}

func findCfgInDir(dir string) string {
	for _, cfgName := range cfgFilenames {
		path := filepath.Join(dir, cfgName)
		if _, err := os.Stat(path); err == nil {
			return path
		}
	}
	return ""
}

func (c *Config) normalize() error {
	if err := c.Model.normalize(); err != nil {
		return errors.Wrap(err, "model")
	}

	if err := c.Exec.normalize(); err != nil {
		return errors.Wrap(err, "exec")
	}

	if c.Resolver.IsDefined() {
		if err := c.Resolver.normalize(); err != nil {
			return errors.Wrap(err, "resolver")
		}
	}

	if c.Models == nil {
		c.Models = TypeMap{}
	}

	return nil
}

func (c *Config) InjectBuiltins(s *ast.Schema) {
	builtins := TypeMap{
		"__Directive":         {Model: StringList{"github.com/99designs/gqlgen/graphql/introspection.Directive"}},
		"__DirectiveLocation": {Model: StringList{"github.com/99designs/gqlgen/graphql.String"}},
		"__Type":              {Model: StringList{"github.com/99designs/gqlgen/graphql/introspection.Type"}},
		"__TypeKind":          {Model: StringList{"github.com/99designs/gqlgen/graphql.String"}},
		"__Field":             {Model: StringList{"github.com/99designs/gqlgen/graphql/introspection.Field"}},
		"__EnumValue":         {Model: StringList{"github.com/99designs/gqlgen/graphql/introspection.EnumValue"}},
		"__InputValue":        {Model: StringList{"github.com/99designs/gqlgen/graphql/introspection.InputValue"}},
		"__Schema":            {Model: StringList{"github.com/99designs/gqlgen/graphql/introspection.Schema"}},
		"Float":               {Model: StringList{"github.com/99designs/gqlgen/graphql.Float"}},
		"String":              {Model: StringList{"github.com/99designs/gqlgen/graphql.String"}},
		"Boolean":             {Model: StringList{"github.com/99designs/gqlgen/graphql.Boolean"}},
		"Int": {Model: StringList{
			"github.com/99designs/gqlgen/graphql.Int",
			"github.com/99designs/gqlgen/graphql.Int32",
			"github.com/99designs/gqlgen/graphql.Int64",
		}},
		"ID": {
			Model: StringList{
				"github.com/99designs/gqlgen/graphql.ID",
				"github.com/99designs/gqlgen/graphql.IntID",
			},
		},
	}

	for typeName, entry := range builtins {
		if !c.Models.Exists(typeName) {
			c.Models[typeName] = entry
		}
	}

	// These are additional types that are injected if defined in the schema as scalars.
	extraBuiltins := TypeMap{
		"Time": {Model: StringList{"github.com/99designs/gqlgen/graphql.Time"}},
		"Map":  {Model: StringList{"github.com/99designs/gqlgen/graphql.Map"}},
	}

	for typeName, entry := range extraBuiltins {
		if t, ok := s.Types[typeName]; !c.Models.Exists(typeName) && ok && t.Kind == ast.Scalar {
			c.Models[typeName] = entry
		}
	}
}

func (c *Config) LoadSchema() (*ast.Schema, map[string]string, error) {
	schemaStrings := map[string]string{}

	var sources []*ast.Source

	for _, filename := range c.SchemaFilename {
		filename = filepath.ToSlash(filename)
		var err error
		var schemaRaw []byte
		schemaRaw, err = ioutil.ReadFile(filename)
		if err != nil {
			fmt.Fprintln(os.Stderr, "unable to open schema: "+err.Error())
			os.Exit(1)
		}
		schemaStrings[filename] = string(schemaRaw)
		sources = append(sources, &ast.Source{Name: filename, Input: schemaStrings[filename]})
	}

	schema, err := gqlparser.LoadSchema(sources...)
	if err != nil {
		return nil, nil, err
	}
	return schema, schemaStrings, nil
}

func abs(path string) string {
	absPath, err := filepath.Abs(path)
	if err != nil {
		panic(err)
	}
	return filepath.ToSlash(absPath)
}