Improve the limayaml and default.yaml syntax

Signed-off-by: Anders F Björklund <anders.f.bjorklund@gmail.com>

Author: afbjorklund

examples/default.yaml

@@ -254,11 +254,11 @@ containerd:
 # Setting of instructions is supported like this: "qemu64,+ssse3".
 cpuType:
   # 🟢 Builtin default: "cortex-a72" (or "host" when running on aarch64 host)
-  aarch64: null
+  aarch64: ""
   # 🟢 Builtin default: "cortex-a7" (or "host" when running on armv7l host)
-  armv7l: null
+  armv7l: ""
   # 🟢 Builtin default: "qemu64" (or "host,-pdpe1gb" when running on x86_64 host)
-  x86_64: null
+  x86_64: ""
 
 rosetta:
   # Enable Rosetta for Linux (EXPERIMENTAL).

pkg/limayaml/limayaml.go

@@ -7,14 +7,14 @@ import (
 )
 
 type LimaYAML struct {
-	VMType             *VMType         `yaml:"vmType,omitempty" json:"vmType,omitempty"`
-	OS                 *OS             `yaml:"os,omitempty" json:"os,omitempty"`
-	Arch               *Arch           `yaml:"arch,omitempty" json:"arch,omitempty"`
+	VMType             *VMType         `yaml:"vmType,omitempty" json:"vmType,omitempty" jsonschema:"nullable"`
+	OS                 *OS             `yaml:"os,omitempty" json:"os,omitempty" jsonschema:"nullable"`
+	Arch               *Arch           `yaml:"arch,omitempty" json:"arch,omitempty" jsonschema:"nullable"`
 	Images             []Image         `yaml:"images" json:"images"` // REQUIRED
 	CPUType            map[Arch]string `yaml:"cpuType,omitempty" json:"cpuType,omitempty"`
-	CPUs               *int            `yaml:"cpus,omitempty" json:"cpus,omitempty"`
-	Memory             *string         `yaml:"memory,omitempty" json:"memory,omitempty"` // go-units.RAMInBytes
-	Disk               *string         `yaml:"disk,omitempty" json:"disk,omitempty"`     // go-units.RAMInBytes
+	CPUs               *int            `yaml:"cpus,omitempty" json:"cpus,omitempty" jsonschema:"nullable"`
+	Memory             *string         `yaml:"memory,omitempty" json:"memory,omitempty" jsonschema:"nullable"` // go-units.RAMInBytes
+	Disk               *string         `yaml:"disk,omitempty" json:"disk,omitempty" jsonschema:"nullable"`     // go-units.RAMInBytes
 	AdditionalDisks    []Disk          `yaml:"additionalDisks,omitempty" json:"additionalDisks,omitempty"`
 	Mounts             []Mount         `yaml:"mounts,omitempty" json:"mounts,omitempty"`
 	MountType          *MountType      `yaml:"mountType,omitempty" json:"mountType,omitempty"`
@@ -181,7 +181,7 @@ const (
 )
 
 type Provision struct {
-	Mode                            ProvisionMode `yaml:"mode" json:"mode"` // default: "system"
+	Mode                            ProvisionMode `yaml:"mode,omitempty" json:"mode,omitempty" jsonschema:"default=system"`
 	SkipDefaultDependencyResolution *bool         `yaml:"skipDefaultDependencyResolution,omitempty" json:"skipDefaultDependencyResolution,omitempty"`
 	Script                          string        `yaml:"script" json:"script"`
 }
@@ -199,10 +199,10 @@ const (
 )
 
 type Probe struct {
-	Mode        ProbeMode // default: "readiness"
-	Description string
-	Script      string
-	Hint        string
+	Mode        ProbeMode `yaml:"mode,omitempty" json:"mode,omitempty" jsonschema:"default=readiness"`
+	Description string    `yaml:"description,omitempty" json:"description,omitempty"`
+	Script      string    `yaml:"script,omitempty" json:"script,omitempty"`
+	Hint        string    `yaml:"hint,omitempty" json:"hint,omitempty"`
 }
 
 type Proto = string