go.chromium.org/luci@v0.0.0-20240309015107-7cdc2e660f33/cipkg/base/actions/cipd.go (about)

     1  // Copyright 2023 The LUCI Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //	http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package actions
    16  
    17  import (
    18  	"context"
    19  	"os"
    20  	"path/filepath"
    21  	"strings"
    22  
    23  	"go.chromium.org/luci/cipkg/core"
    24  	"go.chromium.org/luci/common/exec"
    25  	"go.chromium.org/luci/common/system/environ"
    26  )
    27  
    28  // ActionCIPDExportTransformer is the default transformer for
    29  // core.ActionCIPDExport.
    30  func ActionCIPDExportTransformer(a *core.ActionCIPDExport, deps []Package) (*core.Derivation, error) {
    31  	return ReexecDerivation(a, true)
    32  }
    33  
    34  // ActionCIPDExportExecutor is the default executor for core.ActionCIPDExport.
    35  // It will use the cipd binary/script (or cipd.bat/cipd.exe on windows) on PATH
    36  // to export the packages required.
    37  func ActionCIPDExportExecutor(ctx context.Context, a *core.ActionCIPDExport, out string) error {
    38  	env := environ.FromCtx(ctx)
    39  	env.Update(environ.New(a.Env))
    40  	cmd := cipdCommand(ctx, "export", "--root", out, "--ensure-file", "-")
    41  	cmd.Env = env.Sorted()
    42  	cmd.Stdin = strings.NewReader(a.EnsureFile)
    43  	cmd.Stdout = os.Stdout
    44  	cmd.Stderr = os.Stderr
    45  	return cmd.Run()
    46  }
    47  
    48  func cipdCommand(ctx context.Context, arg ...string) *exec.Cmd {
    49  	cipd := lookup("cipd")
    50  
    51  	// Use cmd to execute batch file on windows.
    52  	if filepath.Ext(cipd) == ".bat" {
    53  		return exec.CommandContext(ctx, lookup("cmd.exe"), append([]string{"/C", cipd}, arg...)...)
    54  	}
    55  
    56  	return exec.CommandContext(ctx, cipd, arg...)
    57  }
    58  
    59  func lookup(bin string) string {
    60  	if path, err := exec.LookPath(bin); err == nil {
    61  		return path
    62  	}
    63  	return bin
    64  }