diskii/cmd/put.go

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// Copyright © 2016 Zellyn Hunter <zellyn@gmail.com>
package cmd
import (
"fmt"
"os"
"github.com/spf13/cobra"
"github.com/zellyn/diskii/lib/disk"
"github.com/zellyn/diskii/lib/helpers"
)
var filetypeName string // flag for file type
var overwrite bool // flag for whether to overwrite
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// putCmd represents the put command, used to put the raw contents
// of a file.
var putCmd = &cobra.Command{
Use: "put",
Short: "put the raw contents of a file",
Long: `Put the raw contents of a file.
put disk-image.dsk HELLO <name of file with contents>
`,
Run: func(cmd *cobra.Command, args []string) {
if err := runPut(args); err != nil {
fmt.Fprintln(os.Stderr, err.Error())
os.Exit(-1)
}
},
}
func init() {
RootCmd.AddCommand(putCmd)
putCmd.Flags().StringVarP(&filetypeName, "type", "t", "B", "Type of file (`diskii filetypes` to list)")
putCmd.Flags().BoolVarP(&overwrite, "overwrite", "f", false, "whether to overwrite existing files")
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}
// runPut performs the actual put logic.
func runPut(args []string) error {
if len(args) != 3 {
return fmt.Errorf("usage: put <disk image> <target filename> <source filename>")
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}
op, err := disk.Open(args[0])
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if err != nil {
return err
}
contents, err := helpers.FileContentsOrStdIn(args[2])
if err != nil {
return err
}
filetype, err := disk.FiletypeForName(filetypeName)
if err != nil {
return err
}
fileInfo := disk.FileInfo{
Descriptor: disk.Descriptor{
Name: args[1],
Length: len(contents),
Type: filetype,
},
Data: contents,
}
_, err = op.PutFile(fileInfo, overwrite)
if err != nil {
return err
}
f, err := os.Create(args[0])
if err != nil {
return err
}
_, err = op.Write(f)
if err != nil {
return err
}
if err = f.Close(); err != nil {
return err
}
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return nil
}