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gem.go
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gem.go
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// Copyright 2022 Chainguard, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cli
import (
"context"
"fmt"
"chainguard.dev/melange/pkg/convert/gem"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
type gemOptions struct {
rubyVersion string
outDir string
baseURIFormat string
additionalRepositories []string
additionalKeyrings []string
}
// GemBuild is the top-level `convert gem` cobra command
//
// TODO: add a --version flag to switch the version of the gem
func GemBuild() *cobra.Command {
o := &gemOptions{}
cmd := &cobra.Command{
Use: "gem",
Short: "Converts an gem into a melange.yaml",
Long: `Converts an gem into a melange.yaml.`,
Example: `
# Convert the latest fluentd gem
convert gem fluentd`,
Args: cobra.MinimumNArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
if len(args) != 1 {
return errors.New("too many arguments, expected only 1")
}
var err error
// Note we pass true here to get the default behaviour of adding
// the wolfi repo and keyring. This is because we want to add them
// by default for gem.
o.outDir, o.additionalRepositories, o.additionalKeyrings, err = getCommonValues(cmd, true)
if err != nil {
return err
}
return o.gemBuild(cmd.Context(), args[0])
},
}
cmd.Flags().StringVar(
&o.rubyVersion, "ruby-version", gem.DefaultRubyVersion,
"version of ruby to use throughout generated manifests",
)
cmd.Flags().StringVar(
&o.baseURIFormat, "base-uri-format", gem.DefaultBaseURIFormat,
"URI to use for querying gems for provided package name",
)
return cmd
}
// gemBuild is the main cli function. It just sets up the GemBuild context and
// then executes the manifest generation.
func (o gemOptions) gemBuild(ctx context.Context, packageName string) error {
context, err := gem.New()
if err != nil {
return fmt.Errorf("initialising gem command: %w", err)
}
context.RubyVersion = o.rubyVersion
context.AdditionalRepositories = o.additionalRepositories
context.AdditionalKeyrings = o.additionalKeyrings
context.OutDir = o.outDir
context.BaseURIFormat = o.baseURIFormat
configFilename := fmt.Sprintf(o.baseURIFormat, packageName)
context.Logger.Printf("generating convert config files for gem %s", configFilename)
return context.Generate(ctx, packageName)
}