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packager_dockerfile.go
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packager_dockerfile.go
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// SPDX-License-Identifier: BSD-3-Clause
// Copyright (c) 2023, Unikraft GmbH and The KraftKit Authors.
// Licensed under the BSD-3-Clause License (the "License").
// You may not use this file except in compliance with the License.
package pkg
import (
"context"
"fmt"
"strings"
"kraftkit.sh/pack"
)
type packagerDockerfile struct{}
// String implements fmt.Stringer.
func (p *packagerDockerfile) String() string {
return "dockerfile"
}
// Packagable implements packager.
func (p *packagerDockerfile) Packagable(ctx context.Context, opts *PkgOptions, args ...string) (bool, error) {
if opts.Project == nil {
// Do not capture the the project is not initialized, as we can still build
// the unikernel using the Dockerfile provided with the `--rootfs`.
_ = opts.initProject(ctx)
}
if opts.Project != nil && opts.Project.Rootfs() != "" && opts.Rootfs == "" {
opts.Rootfs = opts.Project.Rootfs()
}
// TODO(nderjung): This is a very naiive check and should be improved,
// potentially using an external library which parses the Dockerfile syntax.
// In most cases, however, the Dockerfile is usually named `Dockerfile`.
if !strings.Contains(strings.ToLower(opts.Rootfs), "dockerfile") {
return false, fmt.Errorf("%s is not a Dockerfile", opts.Rootfs)
}
return true, nil
}
// Build implements packager.
func (p *packagerDockerfile) Pack(ctx context.Context, opts *PkgOptions, args ...string) ([]pack.Package, error) {
return (&packagerKraftfileRuntime{}).Pack(ctx, opts, args...)
}