/
transpose.go
125 lines (105 loc) · 3.17 KB
/
transpose.go
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// Copyright © 2016-2023 Wei Shen <shenwei356@gmail.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package cmd
import (
"encoding/csv"
"fmt"
"runtime"
"github.com/shenwei356/xopen"
"github.com/spf13/cobra"
)
// transposeCmd represents the transpose command
var transposeCmd = &cobra.Command{
GroupID: "transform",
Use: "transpose",
Short: "transpose CSV data",
Long: `transpose CSV data
`,
Run: func(cmd *cobra.Command, args []string) {
config := getConfigs(cmd)
files := getFileListFromArgsAndFile(cmd, args, true, "infile-list", true)
if len(files) > 1 {
checkError(fmt.Errorf("no more than one file should be given"))
}
runtime.GOMAXPROCS(config.NumCPUs)
outfh, err := xopen.Wopen(config.OutFile)
checkError(err)
defer outfh.Close()
data := [][]string{}
var numCols0, numCols, numRows uint64
for _, file := range files {
csvReader, err := newCSVReaderByConfig(config, file)
if err != nil {
if err == xopen.ErrNoContent {
if config.Verbose {
log.Warningf("csvtk transpose: skipping empty input file: %s", file)
}
continue
}
checkError(err)
}
csvReader.Read(ReadOption{
FieldStr: "1-",
})
once := true
for record := range csvReader.Ch {
if record.Err != nil {
checkError(record.Err)
}
numRows++
data = append(data, record.All)
if once {
numCols = uint64(len(record.All))
if numCols0 == 0 {
numCols0 = numCols
} else if numCols0 != numCols {
checkError(fmt.Errorf("unmatched number of columns between files"))
}
once = false
}
}
readerReport(&config, csvReader, file)
}
writer := csv.NewWriter(outfh)
if config.OutTabs || config.Tabs {
if config.OutDelimiter == ',' {
writer.Comma = '\t'
} else {
writer.Comma = config.OutDelimiter
}
} else {
writer.Comma = config.OutDelimiter
}
defer func() {
writer.Flush()
checkError(writer.Error())
}()
for j := uint64(0); j < numCols0; j++ {
rowNew := make([]string, numRows)
for i, rowOld := range data {
rowNew[i] = rowOld[j]
}
checkError(writer.Write(rowNew))
}
},
}
func init() {
RootCmd.AddCommand(transposeCmd)
}