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/*
Copyright 2020 The Compose Specification Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package paths
import (
"errors"
"fmt"
"path/filepath"
"github.com/compose-spec/compose-go/v2/tree"
"github.com/compose-spec/compose-go/v2/types"
)
type resolver func(any) (any, error)
// ResolveRelativePaths make relative paths absolute
func ResolveRelativePaths(project map[string]any, base string, remotes []RemoteResource) error {
r := relativePathsResolver{
workingDir: base,
remotes: remotes,
}
r.resolvers = map[tree.Path]resolver{
"services.*.build.context": r.absContextPath,
"services.*.build.additional_contexts.*": r.absContextPath,
"services.*.build.ssh.*": r.maybeUnixPath,
"services.*.env_file.*.path": r.absPath,
"services.*.label_file.*": r.absPath,
"services.*.extends.file": r.absExtendsPath,
"services.*.develop.watch.*.path": r.absSymbolicLink,
"services.*.volumes.*": r.absVolumeMount,
"configs.*.file": r.maybeUnixPath,
"secrets.*.file": r.maybeUnixPath,
"include.path": r.absPath,
"include.project_directory": r.absPath,
"include.env_file": r.absPath,
"volumes.*": r.volumeDriverOpts,
}
_, err := r.resolveRelativePaths(project, tree.NewPath())
return err
}
type RemoteResource func(path string) bool
type relativePathsResolver struct {
workingDir string
remotes []RemoteResource
resolvers map[tree.Path]resolver
}
func (r *relativePathsResolver) isRemoteResource(path string) bool {
for _, remote := range r.remotes {
if remote(path) {
return true
}
}
return false
}
func (r *relativePathsResolver) resolveRelativePaths(value any, p tree.Path) (any, error) {
for pattern, resolver := range r.resolvers {
if p.Matches(pattern) {
return resolver(value)
}
}
switch v := value.(type) {
case map[string]any:
for k, e := range v {
resolved, err := r.resolveRelativePaths(e, p.Next(k))
if err != nil {
return nil, err
}
v[k] = resolved
}
case []any:
for i, e := range v {
resolved, err := r.resolveRelativePaths(e, p.Next("[]"))
if err != nil {
return nil, err
}
v[i] = resolved
}
}
return value, nil
}
func (r *relativePathsResolver) absPath(value any) (any, error) {
switch v := value.(type) {
case []any:
for i, s := range v {
abs, err := r.absPath(s)
if err != nil {
return nil, err
}
v[i] = abs
}
return v, nil
case string:
v = ExpandUser(v)
if filepath.IsAbs(v) {
return v, nil
}
if v != "" {
return filepath.Join(r.workingDir, v), nil
}
return v, nil
}
return nil, fmt.Errorf("unexpected type %T", value)
}
func (r *relativePathsResolver) absVolumeMount(a any) (any, error) {
switch vol := a.(type) {
case map[string]any:
if vol["type"] != types.VolumeTypeBind {
return vol, nil
}
src, ok := vol["source"]
if !ok {
return nil, errors.New(`invalid mount config for type "bind": field Source must not be empty`)
}
abs, err := r.maybeUnixPath(src.(string))
if err != nil {
return nil, err
}
vol["source"] = abs
return vol, nil
default:
// not using canonical format, skip
return a, nil
}
}
func (r *relativePathsResolver) volumeDriverOpts(a any) (any, error) {
if a == nil {
return nil, nil
}
vol := a.(map[string]any)
if vol["driver"] != "local" {
return vol, nil
}
do, ok := vol["driver_opts"]
if !ok {
return vol, nil
}
opts := do.(map[string]any)
if dev, ok := opts["device"]; opts["o"] == "bind" && ok {
// This is actually a bind mount
path, err := r.maybeUnixPath(dev)
if err != nil {
return nil, err
}
opts["device"] = path
}
return vol, nil
}
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