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bake: additional validation for matrixes

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This adds the following constraints to the new features:
- Explicit renaming with the `name` property is *only* permitted when
  used with the `matrix` property.
- Group does not support either `name` or `matrix` (we may choose to
  relax this constraint over time).
- All generated names must be unique.

Signed-off-by: Justin Chadwell <me@jedevc.com>
This commit is contained in:
Justin Chadwell
2023-03-30 11:50:28 +01:00
parent d699d08399
commit a1520ea1b2
3 changed files with 158 additions and 92 deletions
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117
bake/hclparser/hclparser.go
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@ -54,6 +54,7 @@ type parser struct {
blocks map[string]map[string][]*hcl.Block
blockValues map[*hcl.Block][]reflect.Value
blockEvalCtx map[*hcl.Block][]*hcl.EvalContext
blockNames map[*hcl.Block][]string
blockTypes map[string]reflect.Type
ectx *hcl.EvalContext
@ -64,6 +65,14 @@ type parser struct {
doneB map[uint64]map[string]struct{}
}
type WithEvalContexts interface {
GetEvalContexts(base *hcl.EvalContext, block *hcl.Block, loadDeps func(hcl.Expression) hcl.Diagnostics) ([]*hcl.EvalContext, error)
}
type WithGetName interface {
GetName(ectx *hcl.EvalContext, block *hcl.Block, loadDeps func(hcl.Expression) hcl.Diagnostics) (string, error)
}
var errUndefined = errors.New("undefined")
func (p *parser) loadDeps(ectx *hcl.EvalContext, exp hcl.Expression, exclude map[string]struct{}, allowMissing bool) hcl.Diagnostics {
@ -306,6 +315,11 @@ func (p *parser) resolveValue(ectx *hcl.EvalContext, name string) (err error) {
// target schema is provided, only the attributes and blocks present in the
// schema will be evaluated.
func (p *parser) resolveBlock(block *hcl.Block, target *hcl.BodySchema) (err error) {
// prepare the variable map for this type
if _, ok := p.ectx.Variables[block.Type]; !ok {
p.ectx.Variables[block.Type] = cty.MapValEmpty(cty.Map(cty.String))
}
// prepare the output destination and evaluation context
t, ok := p.blockTypes[block.Type]
if !ok {
@ -317,11 +331,8 @@ func (p *parser) resolveBlock(block *hcl.Block, target *hcl.BodySchema) (err err
outputs = prev
ectxs = p.blockEvalCtx[block]
} else {
type ectxI interface {
EvalContexts(base *hcl.EvalContext, block *hcl.Block, loadDeps func(hcl.Expression) hcl.Diagnostics) ([]*hcl.EvalContext, error)
}
if v, ok := reflect.New(t).Interface().(ectxI); ok {
ectxs, err = v.EvalContexts(p.ectx, block, func(expr hcl.Expression) hcl.Diagnostics {
if v, ok := reflect.New(t).Interface().(WithEvalContexts); ok {
ectxs, err = v.GetEvalContexts(p.ectx, block, func(expr hcl.Expression) hcl.Diagnostics {
return p.loadDeps(p.ectx, expr, nil, true)
})
if err != nil {
@ -345,12 +356,9 @@ func (p *parser) resolveBlock(block *hcl.Block, target *hcl.BodySchema) (err err
for i, output := range outputs {
target := target
ectx := ectxs[i]
name, _ := getName(output)
if name == "" {
name = block.Labels[0]
}
if err := p.opt.ValidateLabel(name); err != nil {
return err
name := block.Labels[0]
if names, ok := p.blockNames[block]; ok {
name = names[i]
}
if _, ok := p.doneB[key(block, ectx)]; !ok {
@ -415,9 +423,6 @@ func (p *parser) resolveBlock(block *hcl.Block, target *hcl.BodySchema) (err err
// load dependencies from all targeted properties
schema, _ := gohcl.ImpliedBodySchema(reflect.New(t).Interface())
if nameKey, ok := getNameKey(output); ok {
schema.Attributes = append(schema.Attributes, hcl.AttributeSchema{Name: nameKey})
}
content, _, diag := body().PartialContent(schema)
if diag.HasErrors() {
return diag
@ -440,22 +445,6 @@ func (p *parser) resolveBlock(block *hcl.Block, target *hcl.BodySchema) (err err
if diag.HasErrors() {
return diag
}
if nameKey, ok := getNameKey(output); ok {
for k, v := range content.Attributes {
if k == nameKey {
var name2 string
diag = gohcl.DecodeExpression(v.Expr, ectx, &name)
if diag.HasErrors() {
return diag
}
if name2 != "" {
name = name2
}
break
}
}
}
setName(output, name)
// mark all targeted properties as done
for _, a := range content.Attributes {
@ -499,35 +488,49 @@ func (p *parser) resolveBlock(block *hcl.Block, target *hcl.BodySchema) (err err
// resolveBlockNames returns the names of the block, calling resolveBlock to
// evaluate any label fields to correctly resolve the name.
func (p *parser) resolveBlockNames(block *hcl.Block) ([]string, error) {
t, ok := p.blockTypes[block.Type]
if !ok {
return nil, errors.Errorf("internal error: unknown block type %s", block.Type)
if names, ok := p.blockNames[block]; ok {
return names, nil
}
nameKey, ok := getNameKey(reflect.New(t))
if ok {
target := &hcl.BodySchema{
Attributes: []hcl.AttributeSchema{{Name: nameKey}},
Blocks: []hcl.BlockHeaderSchema{{Type: nameKey}},
}
if err := p.resolveBlock(block, target); err != nil {
return nil, err
}
} else {
if err := p.resolveBlock(block, &hcl.BodySchema{}); err != nil {
return nil, err
}
if err := p.resolveBlock(block, &hcl.BodySchema{}); err != nil {
return nil, err
}
names := make([]string, 0, len(p.blockValues[block]))
for _, prev := range p.blockValues[block] {
name, ok := getName(prev)
if !ok {
return nil, errors.New("internal error: failed to get name")
for i, val := range p.blockValues[block] {
ectx := p.blockEvalCtx[block][i]
name := block.Labels[0]
if err := p.opt.ValidateLabel(name); err != nil {
return nil, err
}
if v, ok := val.Interface().(WithGetName); ok {
var err error
name, err = v.GetName(ectx, block, func(expr hcl.Expression) hcl.Diagnostics {
return p.loadDeps(ectx, expr, nil, true)
})
if err != nil {
return nil, err
}
if err := p.opt.ValidateLabel(name); err != nil {
return nil, err
}
}
setName(val, name)
names = append(names, name)
}
found := map[string]struct{}{}
for _, name := range names {
if _, ok := found[name]; ok {
return nil, errors.Errorf("duplicate name %q", name)
}
found[name] = struct{}{}
}
p.blockNames[block] = names
return names, nil
}
@ -570,6 +573,7 @@ func Parse(b hcl.Body, opt Opt, val interface{}) (map[string]map[string][]string
blocks: map[string]map[string][]*hcl.Block{},
blockValues: map[*hcl.Block][]reflect.Value{},
blockEvalCtx: map[*hcl.Block][]*hcl.EvalContext{},
blockNames: map[*hcl.Block][]string{},
blockTypes: map[string]reflect.Type{},
ectx: &hcl.EvalContext{
Variables: map[string]cty.Value{},
@ -837,19 +841,6 @@ func getName(v reflect.Value) (string, bool) {
return "", false
}
func getNameKey(v reflect.Value) (string, bool) {
numFields := v.Elem().Type().NumField()
for i := 0; i < numFields; i++ {
parts := strings.Split(v.Elem().Type().Field(i).Tag.Get("hcl"), ",")
for _, t := range parts[1:] {
if t == "label" {
return parts[0], true
}
}
}
return "", false
}
func getNameIndex(v reflect.Value) (int, bool) {
numFields := v.Elem().Type().NumField()
for i := 0; i < numFields; i++ {