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* Update package version * Update makefile targets * Update readme packages * Remaining old packages via rg/sd
127 lines
3.3 KiB
Go
127 lines
3.3 KiB
Go
package transformers
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import (
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"container/list"
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"fmt"
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"os"
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"github.com/johnkerl/miller/v6/pkg/bifs"
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"github.com/johnkerl/miller/v6/pkg/cli"
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"github.com/johnkerl/miller/v6/pkg/lib"
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"github.com/johnkerl/miller/v6/pkg/types"
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)
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// ----------------------------------------------------------------
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const verbNameSec2GMTDate = "sec2gmtdate"
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var Sec2GMTDateSetup = TransformerSetup{
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Verb: verbNameSec2GMTDate,
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UsageFunc: transformerSec2GMTDateUsage,
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ParseCLIFunc: transformerSec2GMTDateParseCLI,
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IgnoresInput: false,
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}
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func transformerSec2GMTDateUsage(
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o *os.File,
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) {
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fmt.Fprintf(o, "Usage: ../c/mlr sec2gmtdate {comma-separated list of field names}\n")
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fmt.Fprintf(o, "Replaces a numeric field representing seconds since the epoch with the\n")
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fmt.Fprintf(o, "corresponding GMT year-month-day timestamp; leaves non-numbers as-is.\n")
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fmt.Fprintf(o, "This is nothing more than a keystroke-saver for the sec2gmtdate function:\n")
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fmt.Fprintf(o, " ../c/mlr sec2gmtdate time1,time2\n")
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fmt.Fprintf(o, "is the same as\n")
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fmt.Fprintf(o, " ../c/mlr put '$time1=sec2gmtdate($time1);$time2=sec2gmtdate($time2)'\n")
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}
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func transformerSec2GMTDateParseCLI(
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pargi *int,
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argc int,
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args []string,
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_ *cli.TOptions,
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doConstruct bool, // false for first pass of CLI-parse, true for second pass
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) IRecordTransformer {
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// Skip the verb name from the current spot in the mlr command line
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argi := *pargi
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argi++
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for argi < argc /* variable increment: 1 or 2 depending on flag */ {
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opt := args[argi]
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if opt[0] != '-' {
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break // No more flag options to process
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}
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if args[argi] == "--" {
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break // All transformers must do this so main-flags can follow verb-flags
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}
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argi++
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if opt == "-h" || opt == "--help" {
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transformerSec2GMTDateUsage(os.Stdout)
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os.Exit(0)
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} else {
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transformerSec2GMTDateUsage(os.Stderr)
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os.Exit(1)
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}
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}
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if argi >= argc {
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transformerSec2GMTDateUsage(os.Stderr)
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os.Exit(1)
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}
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fieldNames := args[argi]
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argi++
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*pargi = argi
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if !doConstruct { // All transformers must do this for main command-line parsing
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return nil
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}
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transformer, err := NewTransformerSec2GMTDate(
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fieldNames,
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)
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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return transformer
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}
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// ----------------------------------------------------------------
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type TransformerSec2GMTDate struct {
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fieldNameList []string
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}
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func NewTransformerSec2GMTDate(
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fieldNames string,
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) (*TransformerSec2GMTDate, error) {
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tr := &TransformerSec2GMTDate{
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fieldNameList: lib.SplitString(fieldNames, ","),
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}
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return tr, nil
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}
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// ----------------------------------------------------------------
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func (tr *TransformerSec2GMTDate) Transform(
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inrecAndContext *types.RecordAndContext,
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outputRecordsAndContexts *list.List, // list of *types.RecordAndContext
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inputDownstreamDoneChannel <-chan bool,
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outputDownstreamDoneChannel chan<- bool,
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) {
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HandleDefaultDownstreamDone(inputDownstreamDoneChannel, outputDownstreamDoneChannel)
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if !inrecAndContext.EndOfStream {
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inrec := inrecAndContext.Record
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for _, fieldName := range tr.fieldNameList {
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value := inrec.Get(fieldName)
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if value != nil {
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inrec.PutReference(fieldName, bifs.BIF_sec2gmtdate(value))
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}
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}
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outputRecordsAndContexts.PushBack(inrecAndContext)
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} else { // End of record stream
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outputRecordsAndContexts.PushBack(inrecAndContext) // end-of-stream marker
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}
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}
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