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buildflags: handle unknown values from cty

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Update the buildflags cty code to handle unknown values. When hcl
decodes a value with an invalid variable name, it appends a diagnostic
for the error and then returns an unknown value so it can continue
processing the file and finding more errors.

The iteration code has now been changed to use a rangefunc from go 1.23
and it skips empty or unknown values. Empty values are valid when they
are skipped and unknown values will have a diagnostic for itself.

Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>
This commit is contained in:
Jonathan A. Sternberg
2025-02-06 09:45:18 -06:00
parent b76fdcaf8d
commit abc85c38f8
9 changed files with 88 additions and 43 deletions
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8
util/buildflags/cache_cty.go
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@ -23,13 +23,7 @@ func (o *CacheOptions) FromCtyValue(in cty.Value, p cty.Path) error {
func (o *CacheOptions) fromCtyValue(in cty.Value, p cty.Path) error {
*o = make([]*CacheOptionsEntry, 0, in.LengthInt())
for elem := in.ElementIterator(); elem.Next(); {
_, value := elem.Element()
if isEmpty(value) {
continue
}
for value := range eachElement(in) {
// Special handling for a string type to handle ref only format.
if value.Type() == cty.String {
entries, err := ParseCacheEntry([]string{value.AsString()})