overdue

.rclone_repo/cmd/cat/cat.go

@@ -0,0 +1,80 @@
+package cat
+
+import (
+	"io"
+	"io/ioutil"
+	"log"
+	"os"
+
+	"github.com/ncw/rclone/cmd"
+	"github.com/ncw/rclone/fs/operations"
+	"github.com/spf13/cobra"
+)
+
+// Globals
+var (
+	head    = int64(0)
+	tail    = int64(0)
+	offset  = int64(0)
+	count   = int64(-1)
+	discard = false
+)
+
+func init() {
+	cmd.Root.AddCommand(commandDefintion)
+	commandDefintion.Flags().Int64VarP(&head, "head", "", head, "Only print the first N characters.")
+	commandDefintion.Flags().Int64VarP(&tail, "tail", "", tail, "Only print the last N characters.")
+	commandDefintion.Flags().Int64VarP(&offset, "offset", "", offset, "Start printing at offset N (or from end if -ve).")
+	commandDefintion.Flags().Int64VarP(&count, "count", "", count, "Only print N characters.")
+	commandDefintion.Flags().BoolVarP(&discard, "discard", "", discard, "Discard the output instead of printing.")
+}
+
+var commandDefintion = &cobra.Command{
+	Use:   "cat remote:path",
+	Short: `Concatenates any files and sends them to stdout.`,
+	Long: `
+rclone cat sends any files to standard output.
+
+You can use it like this to output a single file
+
+    rclone cat remote:path/to/file
+
+Or like this to output any file in dir or subdirectories.
+
+    rclone cat remote:path/to/dir
+
+Or like this to output any .txt files in dir or subdirectories.
+
+    rclone --include "*.txt" cat remote:path/to/dir
+
+Use the --head flag to print characters only at the start, --tail for
+the end and --offset and --count to print a section in the middle.
+Note that if offset is negative it will count from the end, so
+--offset -1 --count 1 is equivalent to --tail 1.
+`,
+	Run: func(command *cobra.Command, args []string) {
+		usedOffset := offset != 0 || count >= 0
+		usedHead := head > 0
+		usedTail := tail > 0
+		if usedHead && usedTail || usedHead && usedOffset || usedTail && usedOffset {
+			log.Fatalf("Can only use one of  --head, --tail or --offset with --count")
+		}
+		if head > 0 {
+			offset = 0
+			count = head
+		}
+		if tail > 0 {
+			offset = -tail
+			count = -1
+		}
+		cmd.CheckArgs(1, 1, command, args)
+		fsrc := cmd.NewFsSrc(args)
+		var w io.Writer = os.Stdout
+		if discard {
+			w = ioutil.Discard
+		}
+		cmd.Run(false, false, command, func() error {
+			return operations.Cat(fsrc, w, offset, count)
+		})
+	},
+}