github.com/containerd/nerdctl@v1.7.7/cmd/nerdctl/container_cp.go (about)

     1  /*
     2     Copyright The containerd Authors.
     3  
     4     Licensed under the Apache License, Version 2.0 (the "License");
     5     you may not use this file except in compliance with the License.
     6     You may obtain a copy of the License at
     7  
     8         http://www.apache.org/licenses/LICENSE-2.0
     9  
    10     Unless required by applicable law or agreed to in writing, software
    11     distributed under the License is distributed on an "AS IS" BASIS,
    12     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13     See the License for the specific language governing permissions and
    14     limitations under the License.
    15  */
    16  
    17  package main
    18  
    19  import (
    20  	"errors"
    21  	"path/filepath"
    22  	"strings"
    23  
    24  	"github.com/spf13/cobra"
    25  )
    26  
    27  var errFileSpecDoesntMatchFormat = errors.New("filespec must match the canonical format: [container:]file/path")
    28  
    29  func parseCpFileSpec(arg string) (*cpFileSpec, error) {
    30  	i := strings.Index(arg, ":")
    31  
    32  	// filespec starting with a semicolon is invalid
    33  	if i == 0 {
    34  		return nil, errFileSpecDoesntMatchFormat
    35  	}
    36  
    37  	if filepath.IsAbs(arg) {
    38  		// Explicit local absolute path, e.g., `C:\foo` or `/foo`.
    39  		return &cpFileSpec{
    40  			Container: nil,
    41  			Path:      arg,
    42  		}, nil
    43  	}
    44  
    45  	parts := strings.SplitN(arg, ":", 2)
    46  
    47  	if len(parts) == 1 || strings.HasPrefix(parts[0], ".") {
    48  		// Either there's no `:` in the arg
    49  		// OR it's an explicit local relative path like `./file:name.txt`.
    50  		return &cpFileSpec{
    51  			Path: arg,
    52  		}, nil
    53  	}
    54  
    55  	return &cpFileSpec{
    56  		Container: &parts[0],
    57  		Path:      parts[1],
    58  	}, nil
    59  }
    60  
    61  type cpFileSpec struct {
    62  	Container *string
    63  	Path      string
    64  }
    65  
    66  func cpShellComplete(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
    67  	return nil, cobra.ShellCompDirectiveFilterFileExt
    68  }