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compose.go
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package bake
import (
"fmt"
"os"
"reflect"
"strings"
"github.com/compose-spec/compose-go/loader"
compose "github.com/compose-spec/compose-go/types"
)
func parseCompose(dt []byte) (*compose.Project, error) {
return loader.Load(compose.ConfigDetails{
ConfigFiles: []compose.ConfigFile{
{
Content: dt,
},
},
Environment: envMap(os.Environ()),
}, func(options *loader.Options) {
options.SkipNormalization = true
})
}
func envMap(env []string) map[string]string {
result := make(map[string]string, len(env))
for _, s := range env {
kv := strings.SplitN(s, "=", 2)
if len(kv) != 2 {
continue
}
result[kv[0]] = kv[1]
}
return result
}
func ParseCompose(dt []byte) (*Config, error) {
cfg, err := parseCompose(dt)
if err != nil {
return nil, err
}
var c Config
var zeroBuildConfig compose.BuildConfig
if len(cfg.Services) > 0 {
c.Groups = []*Group{}
c.Targets = []*Target{}
g := &Group{Name: "default"}
for _, s := range cfg.Services {
if s.Build == nil || reflect.DeepEqual(s.Build, zeroBuildConfig) {
// if not make sure they're setting an image or it's invalid d-c.yml
if s.Image == "" {
return nil, fmt.Errorf("compose file invalid: service %s has neither an image nor a build context specified. At least one must be provided", s.Name)
}
continue
}
var contextPathP *string
if s.Build.Context != "" {
contextPath := s.Build.Context
contextPathP = &contextPath
}
var dockerfilePathP *string
if s.Build.Dockerfile != "" {
dockerfilePath := s.Build.Dockerfile
dockerfilePathP = &dockerfilePath
}
g.Targets = append(g.Targets, s.Name)
t := &Target{
Name: s.Name,
Context: contextPathP,
Dockerfile: dockerfilePathP,
Labels: s.Build.Labels,
Args: flatten(s.Build.Args.Resolve(func(val string) (string, bool) {
val, ok := cfg.Environment[val]
return val, ok
})),
CacheFrom: s.Build.CacheFrom,
}
if err = t.composeExtTarget(s.Build.Extensions); err != nil {
return nil, err
}
if s.Build.Target != "" {
target := s.Build.Target
t.Target = &target
}
if len(t.Tags) == 0 && s.Image != "" {
t.Tags = []string{s.Image}
}
c.Targets = append(c.Targets, t)
}
c.Groups = append(c.Groups, g)
}
return &c, nil
}
func flatten(in compose.MappingWithEquals) compose.Mapping {
if len(in) == 0 {
return nil
}
out := compose.Mapping{}
for k, v := range in {
if v == nil {
continue
}
out[k] = *v
}
return out
}
// composeExtTarget converts Compose build extension x-bake to bake Target
// https://github.com/compose-spec/compose-spec/blob/master/spec.md#extension
func (t *Target) composeExtTarget(exts map[string]interface{}) error {
if ext, ok := exts["x-bake"]; ok {
for key, val := range ext.(map[string]interface{}) {
switch key {
case "tags":
if res, k := val.(string); k {
t.Tags = append(t.Tags, res)
} else {
for _, res := range val.([]interface{}) {
t.Tags = append(t.Tags, res.(string))
}
}
case "cache-from":
t.CacheFrom = []string{} // Needed to override the main field
if res, k := val.(string); k {
t.CacheFrom = append(t.CacheFrom, res)
} else {
for _, res := range val.([]interface{}) {
t.CacheFrom = append(t.CacheFrom, res.(string))
}
}
case "cache-to":
if res, k := val.(string); k {
t.CacheTo = append(t.CacheTo, res)
} else {
for _, res := range val.([]interface{}) {
t.CacheTo = append(t.CacheTo, res.(string))
}
}
case "secret":
if res, k := val.(string); k {
t.Secrets = append(t.Secrets, res)
} else {
for _, res := range val.([]interface{}) {
t.Secrets = append(t.Secrets, res.(string))
}
}
case "ssh":
if res, k := val.(string); k {
t.SSH = append(t.SSH, res)
} else {
for _, res := range val.([]interface{}) {
t.SSH = append(t.SSH, res.(string))
}
}
case "platforms":
if res, k := val.(string); k {
t.Platforms = append(t.Platforms, res)
} else {
for _, res := range val.([]interface{}) {
t.Platforms = append(t.Platforms, res.(string))
}
}
case "output":
if res, k := val.(string); k {
t.Outputs = append(t.Outputs, res)
} else {
for _, res := range val.([]interface{}) {
t.Outputs = append(t.Outputs, res.(string))
}
}
case "pull":
if res, ok := val.(bool); ok {
t.Pull = &res
}
case "no-cache":
if res, ok := val.(bool); ok {
t.NoCache = &res
}
default:
return fmt.Errorf("compose file invalid: unkwown %s field for x-bake", key)
}
}
}
return nil
}