add fiot variant for fedora-iot

v1_0 is compatible with ignition 3.4.0
v1_1_exp is experimental version compatible
with ignition 3.5.0
docs added for fiot

Signed-off-by: Sayan Paul <saypaul@redhat.com>

config/config.go

@@ -25,6 +25,8 @@ import (
 	fcos1_4 "github.com/coreos/butane/config/fcos/v1_4"
 	fcos1_5 "github.com/coreos/butane/config/fcos/v1_5"
 	fcos1_6_exp "github.com/coreos/butane/config/fcos/v1_6_exp"
+	fiot1_0 "github.com/coreos/butane/config/fiot/v1_0"
+	fiot1_1_exp "github.com/coreos/butane/config/fiot/v1_1_exp"
 	flatcar1_0 "github.com/coreos/butane/config/flatcar/v1_0"
 	flatcar1_1 "github.com/coreos/butane/config/flatcar/v1_1"
 	flatcar1_2_exp "github.com/coreos/butane/config/flatcar/v1_2_exp"
@@ -77,6 +79,8 @@ func init() {
 	RegisterTranslator("r4e", "1.0.0", r4e1_0.ToIgn3_3Bytes)
 	RegisterTranslator("r4e", "1.1.0", r4e1_1.ToIgn3_4Bytes)
 	RegisterTranslator("r4e", "1.2.0-experimental", r4e1_2_exp.ToIgn3_5Bytes)
+	RegisterTranslator("fiot", "1.0.0", fiot1_0.ToIgn3_4Bytes)
+	RegisterTranslator("fiot", "1.1.0-experimental", fiot1_1_exp.ToIgn3_5Bytes)
 	RegisterTranslator("rhcos", "0.1.0", unsupportedRhcosVariant)
 }
 

config/fiot/v1_0/schema.go

@@ -0,0 +1,23 @@
+// Copyright 2022 Red Hat, Inc
+//
+// 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 v1_0
+
+import (
+	base "github.com/coreos/butane/base/v0_5"
+)
+
+type Config struct {
+	base.Config `yaml:",inline"`
+}

config/fiot/v1_0/translate.go

@@ -0,0 +1,54 @@
+// Copyright 2022 Red Hat, Inc
+//
+// 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 v1_0
+
+import (
+	"github.com/coreos/butane/config/common"
+	cutil "github.com/coreos/butane/config/util"
+
+	"github.com/coreos/ignition/v2/config/v3_4/types"
+	"github.com/coreos/vcontext/report"
+)
+
+var (
+	fieldFilters = cutil.NewFilters(types.Config{}, cutil.FilterMap{
+		"kernelArguments":     common.ErrGeneralKernelArgumentSupport,
+		"storage.disks":       common.ErrDiskSupport,
+		"storage.filesystems": common.ErrFilesystemSupport,
+		"storage.luks":        common.ErrLuksSupport,
+		"storage.raid":        common.ErrRaidSupport,
+	})
+)
+
+// Return FieldFilters for this spec.
+func (c Config) FieldFilters() *cutil.FieldFilters {
+	return &fieldFilters
+}
+
+// ToIgn3_4 translates the config to an Ignition config. It returns a
+// report of any errors or warnings in the source and resultant config. If
+// the report has fatal errors or it encounters other problems translating,
+// an error is returned.
+func (c Config) ToIgn3_4(options common.TranslateOptions) (types.Config, report.Report, error) {
+	cfg, r, err := cutil.Translate(c, "ToIgn3_4Unvalidated", options)
+	return cfg.(types.Config), r, err
+}
+
+// ToIgn3_4Bytes translates from a v1.1 Butane config to a v3.4.0 Ignition config. It returns a report of any errors or
+// warnings in the source and resultant config. If the report has fatal errors or it encounters other problems
+// translating, an error is returned.
+func ToIgn3_4Bytes(input []byte, options common.TranslateBytesOptions) ([]byte, report.Report, error) {
+	return cutil.TranslateBytes(input, &Config{}, "ToIgn3_4", options)
+}

config/fiot/v1_0/translate_test.go

@@ -0,0 +1,180 @@
+// Copyright 2022 Red Hat, Inc
+//
+// 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 v1_0
+
+import (
+	"fmt"
+	"testing"
+
+	baseutil "github.com/coreos/butane/base/util"
+	base "github.com/coreos/butane/base/v0_5"
+	"github.com/coreos/butane/config/common"
+	confutil "github.com/coreos/butane/config/util"
+	"github.com/coreos/ignition/v2/config/util"
+	"github.com/coreos/vcontext/path"
+	"github.com/coreos/vcontext/report"
+	"github.com/stretchr/testify/assert"
+)
+
+// Test that we error on unsupported fields for fiot
+func TestTranslateInvalid(t *testing.T) {
+	type InvalidEntry struct {
+		Kind report.EntryKind
+		Err  error
+		Path path.ContextPath
+	}
+	tests := []struct {
+		In      Config
+		Entries []InvalidEntry
+	}{
+		// we don't support setting kernel arguments
+		{
+			Config{
+				Config: base.Config{
+					KernelArguments: base.KernelArguments{
+						ShouldExist: []base.KernelArgument{
+							"test",
+						},
+					},
+				},
+			},
+			[]InvalidEntry{
+				{
+					report.Error,
+					common.ErrGeneralKernelArgumentSupport,
+					path.New("yaml", "kernel_arguments"),
+				},
+			},
+		},
+		// we don't support unsetting kernel arguments either
+		{
+			Config{
+				Config: base.Config{
+					KernelArguments: base.KernelArguments{
+						ShouldNotExist: []base.KernelArgument{
+							"another-test",
+						},
+					},
+				},
+			},
+			[]InvalidEntry{
+				{
+					report.Error,
+					common.ErrGeneralKernelArgumentSupport,
+					path.New("yaml", "kernel_arguments"),
+				},
+			},
+		},
+		// disk customizations are made in Image Builder, fiot doesn't support this via ignition
+		{
+			Config{
+				Config: base.Config{
+					Storage: base.Storage{
+						Disks: []base.Disk{
+							{
+								Device: "some-device",
+							},
+						},
+					},
+				},
+			},
+			[]InvalidEntry{
+				{
+					report.Error,
+					common.ErrDiskSupport,
+					path.New("yaml", "storage", "disks"),
+				},
+			},
+		},
+		// filesystem customizations are made in Image Builder, fiot doesn't support this via ignition
+		{
+			Config{
+				Config: base.Config{
+					Storage: base.Storage{
+						Filesystems: []base.Filesystem{
+							{
+								Device: "/dev/disk/by-label/TEST",
+								Path:   util.StrToPtr("/var"),
+							},
+						},
+					},
+				},
+			},
+			[]InvalidEntry{
+				{
+					report.Error,
+					common.ErrFilesystemSupport,
+					path.New("yaml", "storage", "filesystems"),
+				},
+			},
+		},
+		// default luks configuration is made in Image Builder for fiot, we don't support this via ignition
+		{
+			Config{
+				Config: base.Config{
+					Storage: base.Storage{
+						Luks: []base.Luks{
+							{
+								Label: util.StrToPtr("some-label"),
+							},
+						},
+					},
+				},
+			},
+			[]InvalidEntry{
+				{
+					report.Error,
+					common.ErrLuksSupport,
+					path.New("yaml", "storage", "luks"),
+				},
+			},
+		},
+		// we don't support configuring raid via ignition
+		{
+			Config{
+				Config: base.Config{
+					Storage: base.Storage{
+						Raid: []base.Raid{
+							{
+								Name: "some-name",
+							},
+						},
+					},
+				},
+			},
+			[]InvalidEntry{
+				{
+					report.Error,
+					common.ErrRaidSupport,
+					path.New("yaml", "storage", "raid"),
+				},
+			},
+		},
+	}
+	for i, test := range tests {
+		t.Run(fmt.Sprintf("translate %d", i), func(t *testing.T) {
+			var expectedReport report.Report
+			for _, entry := range test.Entries {
+				expectedReport.AddOnError(entry.Path, entry.Err)
+			}
+			actual, translations, r := test.In.ToIgn3_4Unvalidated(common.TranslateOptions{})
+			r.Merge(fieldFilters.Verify(actual))
+			r = confutil.TranslateReportPaths(r, translations)
+			baseutil.VerifyReport(t, test.In, r)
+			assert.Equal(t, expectedReport, r, "report mismatch")
+			assert.NoError(t, translations.DebugVerifyCoverage(actual), "incomplete TranslationSet coverage")
+		})
+	}
+}

config/fiot/v1_1_exp/schema.go

@@ -0,0 +1,23 @@
+// Copyright 2022 Red Hat, Inc
+//
+// 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 v1_1_exp
+
+import (
+	base "github.com/coreos/butane/base/v0_6_exp"
+)
+
+type Config struct {
+	base.Config `yaml:",inline"`
+}

config/fiot/v1_1_exp/translate.go

@@ -0,0 +1,54 @@
+// Copyright 2022 Red Hat, Inc
+//
+// 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 v1_1_exp
+
+import (
+	"github.com/coreos/butane/config/common"
+	cutil "github.com/coreos/butane/config/util"
+
+	"github.com/coreos/ignition/v2/config/v3_5_experimental/types"
+	"github.com/coreos/vcontext/report"
+)
+
+var (
+	fieldFilters = cutil.NewFilters(types.Config{}, cutil.FilterMap{
+		"kernelArguments":     common.ErrGeneralKernelArgumentSupport,
+		"storage.disks":       common.ErrDiskSupport,
+		"storage.filesystems": common.ErrFilesystemSupport,
+		"storage.luks":        common.ErrLuksSupport,
+		"storage.raid":        common.ErrRaidSupport,
+	})
+)
+
+// Return FieldFilters for this spec.
+func (c Config) FieldFilters() *cutil.FieldFilters {
+	return &fieldFilters
+}
+
+// ToIgn3_5 translates the config to an Ignition config. It returns a
+// report of any errors or warnings in the source and resultant config. If
+// the report has fatal errors or it encounters other problems translating,
+// an error is returned.
+func (c Config) ToIgn3_5(options common.TranslateOptions) (types.Config, report.Report, error) {
+	cfg, r, err := cutil.Translate(c, "ToIgn3_5Unvalidated", options)
+	return cfg.(types.Config), r, err
+}
+
+// ToIgn3_5Bytes translates from a v1.2 Butane config to a v3.5.0 Ignition config. It returns a report of any errors or
+// warnings in the source and resultant config. If the report has fatal errors or it encounters other problems
+// translating, an error is returned.
+func ToIgn3_5Bytes(input []byte, options common.TranslateBytesOptions) ([]byte, report.Report, error) {
+	return cutil.TranslateBytes(input, &Config{}, "ToIgn3_5", options)
+}