github.com/kaydxh/golang@v0.0.131/go/os/exec/exec_options.go (about)

     1  /*
     2   *Copyright (c) 2022, kaydxh
     3   *
     4   *Permission is hereby granted, free of charge, to any person obtaining a copy
     5   *of this software and associated documentation files (the "Software"), to deal
     6   *in the Software without restriction, including without limitation the rights
     7   *to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     8   *copies of the Software, and to permit persons to whom the Software is
     9   *furnished to do so, subject to the following conditions:
    10   *
    11   *The above copyright notice and this permission notice shall be included in all
    12   *copies or substantial portions of the Software.
    13   *
    14   *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    15   *IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    16   *FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    17   *AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    18   *LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    19   *OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
    20   *SOFTWARE.
    21   */
    22  package exec
    23  
    24  var _default_CommandBuilder_value = func() (val CommandBuilder) { return }()
    25  
    26  type CommandBuilderOption interface {
    27  	apply(*CommandBuilder)
    28  }
    29  
    30  // EmptyCommandBuilderOption does not alter the configuration. It can be embedded
    31  // in another structure to build custom options.
    32  //
    33  // This API is EXPERIMENTAL.
    34  type EmptyCommandBuilderOption struct{}
    35  
    36  func (EmptyCommandBuilderOption) apply(*CommandBuilder) {}
    37  
    38  // CopyDirOptionFunc wraps a function that modifies CopyDir into an
    39  // implementation of the CopyDirOption interface.
    40  type CommandBuilderOptionFunc func(*CommandBuilder)
    41  
    42  func (f CommandBuilderOptionFunc) apply(do *CommandBuilder) {
    43  	f(do)
    44  }
    45  
    46  // sample code for option, default for nothing to change
    47  func _CommandBuilderOptionWithDefault() CommandBuilderOption {
    48  	return CommandBuilderOptionFunc(func(*CommandBuilder) {
    49  		// nothing to change
    50  	})
    51  }
    52  
    53  func (o *CommandBuilder) ApplyOptions(
    54  	options ...CommandBuilderOption,
    55  ) *CommandBuilder {
    56  	for _, opt := range options {
    57  		if opt == nil {
    58  			continue
    59  		}
    60  		opt.apply(o)
    61  	}
    62  	return o
    63  }