github.com/zntrio/harp/v2@v2.0.9/pkg/tasks/to/ruleset.go (about)

     1  // Licensed to Elasticsearch B.V. under one or more contributor
     2  // license agreements. See the NOTICE file distributed with
     3  // this work for additional information regarding copyright
     4  // ownership. Elasticsearch B.V. licenses this file to you under
     5  // the Apache License, Version 2.0 (the "License"); you may
     6  // not use this file except in compliance with the License.
     7  // You may obtain a copy of the License at
     8  //
     9  //     http://www.apache.org/licenses/LICENSE-2.0
    10  //
    11  // Unless required by applicable law or agreed to in writing,
    12  // software distributed under the License is distributed on an
    13  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    14  // KIND, either express or implied.  See the License for the
    15  // specific language governing permissions and limitations
    16  // under the License.
    17  
    18  package to
    19  
    20  import (
    21  	"context"
    22  	"fmt"
    23  
    24  	"github.com/zntrio/harp/v2/pkg/bundle"
    25  	"github.com/zntrio/harp/v2/pkg/bundle/ruleset"
    26  	"github.com/zntrio/harp/v2/pkg/sdk/convert"
    27  	"github.com/zntrio/harp/v2/pkg/tasks"
    28  )
    29  
    30  // RuleSetTask implements RuleSet generation from a bundle.
    31  type RuleSetTask struct {
    32  	ContainerReader tasks.ReaderProvider
    33  	OutputWriter    tasks.WriterProvider
    34  }
    35  
    36  // Run the task.
    37  func (t *RuleSetTask) Run(ctx context.Context) error {
    38  	// Create input reader
    39  	reader, err := t.ContainerReader(ctx)
    40  	if err != nil {
    41  		return fmt.Errorf("unable to initialize bundle reader: %w", err)
    42  	}
    43  
    44  	// Load bundle
    45  	b, err := bundle.FromContainerReader(reader)
    46  	if err != nil {
    47  		return fmt.Errorf("unable to load bundle content: %w", err)
    48  	}
    49  
    50  	// Generate ruleset
    51  	rs, err := ruleset.FromBundle(b)
    52  	if err != nil {
    53  		return fmt.Errorf("unable to generate RuleSet from given bundle: %w", err)
    54  	}
    55  
    56  	// Marshal as YAML
    57  	out, err := convert.PBtoYAML(rs)
    58  	if err != nil {
    59  		return fmt.Errorf("unable to marshal patch as YAML: %w", err)
    60  	}
    61  
    62  	// Create output writer
    63  	writer, err := t.OutputWriter(ctx)
    64  	if err != nil {
    65  		return fmt.Errorf("unable to initialize output writer: %w", err)
    66  	}
    67  
    68  	// Write output
    69  	fmt.Fprintln(writer, string(out))
    70  
    71  	// No error
    72  	return nil
    73  }