remote: fix implementation of build with --userns=auto for API

`podman-remote` and Libpod API does not supports build with
`--userns=auto` since `IDMappingOptions` were not implemented for API
and bindings, following PR implements passing `IDMappingOptions` via
bindings to API.

Closes: https://github.com/containers/podman/issues/15476

Signed-off-by: Aditya R <arajan@redhat.com>

2 files changed, 17 insertions, 0 deletions

diff --git a/pkg/api/handlers/compat/images_build.go b/pkg/api/handlers/compat/images_build.go
index 020991cc7..7ba1029a7 100644
--- a/pkg/api/handlers/compat/images_build.go
+++ b/pkg/api/handlers/compat/images_build.go
@@ -101,6 +101,7 @@ func BuildImage(w http.ResponseWriter, r *http.Request) {
 		ForceRm                 bool     `schema:"forcerm"`
 		From                    string   `schema:"from"`
 		HTTPProxy               bool     `schema:"httpproxy"`
+		IDMappingOptions        string   `schema:"idmappingoptions"`
 		IdentityLabel           bool     `schema:"identitylabel"`
 		Ignore                  bool     `schema:"ignore"`
 		Isolation               string   `schema:"isolation"`
@@ -389,6 +390,14 @@ func BuildImage(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
+	var idMappingOptions buildahDefine.IDMappingOptions
+	if _, found := r.URL.Query()["idmappingoptions"]; found {
+		if err := json.Unmarshal([]byte(query.IDMappingOptions), &idMappingOptions); err != nil {
+			utils.BadRequest(w, "idmappingoptions", query.IDMappingOptions, err)
+			return
+		}
+	}
+
 	var cacheFrom reference.Named
 	if _, found := r.URL.Query()["cachefrom"]; found {
 		cacheFrom, err = parse.RepoNameToNamedReference(query.CacheFrom)
@@ -644,6 +653,7 @@ func BuildImage(w http.ResponseWriter, r *http.Request) {
 		Excludes:                       excludes,
 		ForceRmIntermediateCtrs:        query.ForceRm,
 		From:                           fromImage,
+		IDMappingOptions:               &idMappingOptions,
 		IgnoreUnrecognizedInstructions: query.Ignore,
 		Isolation:                      isolation,
 		Jobs:                           &jobs,
diff --git a/pkg/bindings/images/build.go b/pkg/bindings/images/build.go
index 2615bc516..8348ac54b 100644
--- a/pkg/bindings/images/build.go
+++ b/pkg/bindings/images/build.go
@@ -88,6 +88,13 @@ func Build(ctx context.Context, containerFiles []string, options entities.BuildO
 		}
 		params.Set("additionalbuildcontexts", string(additionalBuildContextMap))
 	}
+	if options.IDMappingOptions != nil {
+		idmappingsOptions, err := jsoniter.Marshal(options.IDMappingOptions)
+		if err != nil {
+			return nil, err
+		}
+		params.Set("idmappingoptions", string(idmappingsOptions))
+	}
 	if buildArgs := options.Args; len(buildArgs) > 0 {
 		bArgs, err := jsoniter.MarshalToString(buildArgs)
 		if err != nil {