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common.go
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common.go
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package structural
import (
"fmt"
"cuelang.org/go/cue"
"cuelang.org/go/cue/cuecontext"
"github.com/hofstadter-io/cuetils/cmd/cuetils/flags"
)
func newAny(ctx *cue.Context) cue.Value {
return ctx.CompileString("_")
}
func newStruct(ctx *cue.Context) cue.Value {
return ctx.CompileString("{...}")
}
type listProc int
const (
LIST_ERR listProc = iota // unknown arg
LIST_AND // all apply
LIST_OR // any apply
LIST_PER // pairwise
)
func getListProcType(val cue.Value) (listProc, error) {
attr := val.Attribute("list")
// no attribute or no arg, so default is LIST_AND
if attr.Err() != nil || attr.NumArgs() == 0 {
return LIST_AND, nil
}
a, err := attr.String(0)
if err != nil {
return LIST_ERR, err
}
// otherwise, check what arg we have
switch a {
case "and", "":
return LIST_AND, nil
case "or":
return LIST_OR, nil
case "pairwise", "per":
return LIST_PER, nil
default:
return LIST_ERR, fmt.Errorf("Unknown list processing type %q at %v", a, val.Pos())
}
}
func GetLabel(val cue.Value) cue.Selector {
ss := val.Path().Selectors()
s := ss[len(ss)-1]
return s
}
type BinaryOpValueFunc func(lhs, rhs cue.Value, opts *flags.RootPflagpole) (cue.Value, error)
func BinaryOpGlobs(lhs string, rhs []string, opts *flags.RootPflagpole, fn BinaryOpValueFunc) ([]GlobResult, error) {
ctx := cuecontext.New()
lv, err := ReadArg(lhs, ctx, nil)
if err != nil {
return nil, err
}
vals, err := LoadGlobs(rhs)
if len(vals) == 0 {
return nil, fmt.Errorf("no inputs found")
}
results := make([]GlobResult, 0)
for _, val := range vals {
iv := ctx.CompileBytes(val.Content, cue.Filename(val.Filename))
if iv.Err() != nil {
return nil, iv.Err()
}
// Call our OpValueFunc
v, err := fn(lv.Value, iv, opts)
if err != nil {
return nil, err
}
results = append(results, GlobResult{
Filename: val.Filename,
Value: v,
})
}
return results, nil
}
type UnaryOpValueFunc func(val cue.Value, opts *flags.RootPflagpole) (cue.Value, error)
func UnaryOpGlobs(globs []string, opts *flags.RootPflagpole, fn UnaryOpValueFunc) ([]GlobResult, error) {
ctx := cuecontext.New()
vals, err := LoadGlobs(globs)
if err != nil {
return nil, err
}
if len(vals) == 0 {
return nil, fmt.Errorf("no inputs found")
}
results := make([]GlobResult, 0)
for _, val := range vals {
iv := ctx.CompileBytes(val.Content, cue.Filename(val.Filename))
if iv.Err() != nil {
return nil, iv.Err()
}
// Call our OpValueFunc
v, err := fn(iv, opts)
if err != nil {
return nil, err
}
results = append(results, GlobResult{
Filename: val.Filename,
Value: v,
})
}
return results, nil
}