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build: support cacheonly exporter

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cacheonly is supported by moby so add support for buildx
as well so same flags can be used

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
This commit is contained in:
Tonis Tiigi 2020-07-27 22:33:44 -07:00
parent f2cf7cf281
commit 9e5321eab8
1 changed files with 9 additions and 0 deletions
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9
build/build.go
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@ -382,6 +382,15 @@ func toSolveOpt(d driver.Driver, multiDriver bool, opt Options, dl dockerLoadCal
} }
} }
// cacheonly is a fake exporter to opt out of default behaviors
exports := make([]client.ExportEntry, 0, len(opt.Exports))
for _, e := range opt.Exports {
if e.Type != "cacheonly" {
exports = append(exports, e)
}
}
opt.Exports = exports
// set up exporters // set up exporters
for i, e := range opt.Exports { for i, e := range opt.Exports {
if (e.Type == "local" || e.Type == "tar") && opt.ImageIDFile != "" { if (e.Type == "local" || e.Type == "tar") && opt.ImageIDFile != "" {