github.com/bazelbuild/bazel-watcher@v0.25.2/internal/ibazel/workspace/workspace.go (about)

     1  // Copyright 2017 The Bazel Authors. All rights reserved.
     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 workspace
    16  
    17  import (
    18  	"context"
    19  	"errors"
    20  	"os"
    21  	"os/exec"
    22  	"path/filepath"
    23  	"strings"
    24  
    25  	"github.com/bazelbuild/bazel-watcher/internal/ibazel/log"
    26  )
    27  
    28  type Workspace interface {
    29  	FindWorkspace() (string, error)
    30  	ExecuteCommand(command string, args []string)
    31  }
    32  
    33  type MainWorkspace struct{}
    34  
    35  func (m *MainWorkspace) FindWorkspace() (string, error) {
    36  	path, err := os.Getwd()
    37  	if err != nil {
    38  		return "", err
    39  	}
    40  
    41  	volume := filepath.VolumeName(path)
    42  
    43  	for {
    44  		// filepath.Dir() includes a trailing separator if we're at the root
    45  		if path == volume+string(filepath.Separator) {
    46  			path = volume
    47  		}
    48  
    49  		// Check if we're at the workspace path
    50  		if s, err := os.Stat(filepath.Join(path, "WORKSPACE")); err == nil {
    51  			if !s.IsDir() && s.Name() == "WORKSPACE" {
    52  				// In macOS directories called "workspace" will match because the file
    53  				// system isn't case sensitive.
    54  				return path, nil
    55  			}
    56  		}
    57  
    58  		if _, err := os.Stat(filepath.Join(path, "WORKSPACE.bazel")); err == nil {
    59  			return path, nil
    60  		}
    61  
    62  		// If we've reached the root, then we know the cwd isn't within a workspace
    63  		if path == volume {
    64  			return "", errors.New("ibazel was not invoked from within a workspace\n")
    65  		}
    66  
    67  		// Move one level up the path
    68  		path = filepath.Dir(path)
    69  	}
    70  }
    71  
    72  func (m *MainWorkspace) ExecuteCommand(command string, args []string) {
    73  	for i, arg := range args {
    74  		args[i] = strings.TrimSpace(arg)
    75  	}
    76  	log.Logf("Executing command: %s", command)
    77  	workspacePath, err := m.FindWorkspace()
    78  	if err != nil {
    79  		log.Fatalf("Error finding workspace: %v", err)
    80  		os.Exit(5)
    81  	}
    82  	log.Logf("Workspace path: %s", workspacePath)
    83  
    84  	ctx, cancel := context.WithCancel(context.Background())
    85  	defer cancel()
    86  	cmd := exec.CommandContext(ctx, command, args...)
    87  	log.Logf("Executing command: `%s`", strings.Join(cmd.Args, " "))
    88  	cmd.Stdout = os.Stdout
    89  	cmd.Stderr = os.Stderr
    90  	cmd.Dir = workspacePath
    91  
    92  	err = cmd.Run()
    93  	if err != nil {
    94  		log.Errorf("Command failed: %s %s. Error: %s", command, args, err)
    95  	}
    96  }
    97  
    98  type FakeWorkspace struct{}
    99  
   100  func (f *FakeWorkspace) FindWorkspace() (string, error) {
   101  	return "", nil
   102  }
   103  
   104  func (f *FakeWorkspace) ExecuteCommand(command string, args []string) {}