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stat.go
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stat.go
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// Copyright © 2016 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 (
"runtime"
"github.com/shenwei356/xopen"
"github.com/spf13/cobra"
"github.com/dustin/go-humanize"
"github.com/tatsushid/go-prettytable"
)
// statCmd represents the stat command
var statCmd = &cobra.Command{
Use: "stat",
Short: "summary of CSV file",
Long: `summary of CSV file
`,
Run: func(cmd *cobra.Command, args []string) {
config := getConfigs(cmd)
files := getFileList(args)
runtime.GOMAXPROCS(config.NumCPUs)
outfh, err := xopen.Wopen(config.OutFile)
checkError(err)
defer outfh.Close()
tbl, err := prettytable.NewTable([]prettytable.Column{
{Header: "file"},
{Header: "num_cols", AlignRight: true},
{Header: "num_rows", AlignRight: true}}...)
checkError(err)
tbl.Separator = " "
for _, file := range files {
csvReader, err := newCSVReaderByConfig(config, file)
checkError(err)
csvReader.Run()
var numCols, numRows uint64
once := true
for chunk := range csvReader.Ch {
checkError(chunk.Err)
numRows += uint64(len(chunk.Data))
if once {
for _, record := range chunk.Data {
numCols = uint64(len(record))
break
}
once = false
}
}
if numRows > 0 && !config.NoHeaderRow {
numRows--
}
if numRows < 0 {
numRows = 0
}
tbl.AddRow(
file,
humanize.Comma(int64(numCols)),
humanize.Comma(int64(numRows)))
}
outfh.Write(tbl.Bytes())
},
}
func init() {
RootCmd.AddCommand(statCmd)
}