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provenance: handle input:context frontend opt to set config source #6213

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Merged
crazy-max merged 2 commits into from
Sep 13, 2025
Merged

provenance: handle input:context frontend opt to set config source #6213

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57a72b0
provenance: handle input:context frontend opt to set config source
crazy-max Sep 10, 2025
97d953e
handle querystring and subdir URLs when matching git material
tonistiigi Sep 12, 2025
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32 changes: 32 additions & 0 deletions solver/llbsolver/provenance/predicate.go
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@ import (
slsa "github.com/in-toto/in-toto-golang/in_toto/slsa_provenance/common"
slsa02 "github.com/in-toto/in-toto-golang/in_toto/slsa_provenance/v0.2"
provenancetypes "github.com/moby/buildkit/solver/llbsolver/provenance/types"
"github.com/moby/buildkit/util/gitutil"
"github.com/moby/buildkit/util/purl"
"github.com/moby/buildkit/util/urlutil"
"github.com/package-url/packageurl-go"
Expand Down Expand Up @@ -69,6 +70,35 @@ func digestSetForCommit(commit string) slsa.DigestSet {
}

func findMaterial(srcs provenancetypes.Sources, uri string) (*slsa.ProvenanceMaterial, bool) {
// Git URLs in querystring format or subdir need to be converted to fragment format with only ref
gitRef, err := gitutil.ParseURL(uri)
if err == nil && gitRef != nil {
u := gitRef.Remote
var ref string
if gitRef.Opts != nil {
ref = gitRef.Opts.Ref
}
if len(gitRef.Query) > 0 {
for k, v := range gitRef.Query {
if len(v) == 0 {
continue
}
switch k {
case "ref":
ref = v[0]
case "branch":
ref = "refs/heads/" + v[0]
case "tag":
ref = "refs/tags/" + v[0]
}
}
}
if ref != "" {
u += "#" + ref
}
uri = u
}

for _, s := range srcs.Git {
if s.URL == uri {
return &slsa.ProvenanceMaterial{
Expand Down Expand Up @@ -102,6 +132,8 @@ func NewPredicate(c *Capture) (*provenancetypes.ProvenancePredicateSLSA02, error
contextKey := "context"
if v, ok := args["contextkey"]; ok && v != "" {
contextKey = v
} else if v, ok := c.Args["input:context"]; ok && v != "" {
contextKey = "input:context"
}

if v, ok := args[contextKey]; ok && v != "" {
Expand Down