114 lines
2.9 KiB
Go
114 lines
2.9 KiB
Go
package cli
|
|
|
|
import (
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
|
|
"ladder/pkg/ruleset"
|
|
|
|
"golang.org/x/term"
|
|
)
|
|
|
|
// HandleRulesetMerge merges a set of ruleset files, specified by the rulesetPath or RULESET env variable, into either YAML or Gzip format.
|
|
// Exits the program with an error message if the ruleset path is not provided or if loading the ruleset fails.
|
|
//
|
|
// Parameters:
|
|
// - rulesetPath: Specifies the path to the ruleset file.
|
|
// - mergeRulesets: Indicates if a merge operation should be performed.
|
|
// - useGzip: Indicates if the merged rulesets should be gzip-ped.
|
|
// - output: Specifies the output file. If nil, stdout will be used.
|
|
//
|
|
// Returns:
|
|
// - An error if the ruleset loading or merging process fails, otherwise nil.
|
|
func HandleRulesetMerge(rulesetPath string, mergeRulesets bool, useGzip bool, output *os.File) error {
|
|
if !mergeRulesets {
|
|
return nil
|
|
}
|
|
|
|
if rulesetPath == "" {
|
|
rulesetPath = os.Getenv("RULESET")
|
|
}
|
|
|
|
if rulesetPath == "" {
|
|
fmt.Println("error: no ruleset provided. Try again with --ruleset <ruleset.yaml>")
|
|
os.Exit(1)
|
|
}
|
|
|
|
rs, err := ruleset.NewRuleset(rulesetPath)
|
|
if err != nil {
|
|
fmt.Println(err)
|
|
os.Exit(1)
|
|
}
|
|
|
|
if useGzip {
|
|
return gzipMerge(rs, output)
|
|
}
|
|
|
|
return yamlMerge(rs, output)
|
|
}
|
|
|
|
// gzipMerge takes a RuleSet and an optional output file path pointer. It compresses the RuleSet into Gzip format.
|
|
// If the output file path is provided, the compressed data is written to this file. Otherwise, it prints a warning
|
|
// and outputs the binary data to stdout
|
|
//
|
|
// Parameters:
|
|
// - rs: The ruleset.RuleSet to be compressed.
|
|
// - output: The output for the gzip data. If nil, stdout will be used.
|
|
//
|
|
// Returns:
|
|
// - An error if compression or file writing fails, otherwise nil.
|
|
func gzipMerge(rs ruleset.RuleSet, output io.Writer) error {
|
|
gzip, err := rs.GzipYaml()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if output != nil {
|
|
_, err = io.Copy(output, gzip)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
if term.IsTerminal(int(os.Stdout.Fd())) {
|
|
println("warning: binary output can mess up your terminal. Use '--merge-rulesets-output <ruleset.gz>' or pipe it to a file.")
|
|
os.Exit(1)
|
|
}
|
|
|
|
_, err = io.Copy(os.Stdout, gzip)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// yamlMerge takes a RuleSet and an optional output file path pointer. It converts the RuleSet into YAML format.
|
|
// If the output file path is provided, the YAML data is written to this file. If not, the YAML data is printed to stdout.
|
|
//
|
|
// Parameters:
|
|
// - rs: The ruleset.RuleSet to be converted to YAML.
|
|
// - output: The output for the merged data. If nil, stdout will be used.
|
|
//
|
|
// Returns:
|
|
// - An error if YAML conversion or file writing fails, otherwise nil.
|
|
func yamlMerge(rs ruleset.RuleSet, output io.Writer) error {
|
|
yaml, err := rs.Yaml()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if output == nil {
|
|
fmt.Println(yaml)
|
|
os.Exit(0)
|
|
}
|
|
|
|
_, err = io.WriteString(output, yaml)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to write merged YAML ruleset: %v", err)
|
|
}
|
|
|
|
return nil
|
|
}
|