utils.go

Documentation: github.com/bazelbuild/rules_go/go/tools/gopackagesdriver

     1  // Copyright 2021 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 main
    16  
    17  import (
    18  	"context"
    19  	"fmt"
    20  	"go/build"
    21  	"os"
    22  	"os/signal"
    23  	"path"
    24  	"path/filepath"
    25  )
    26  
    27  func getenvDefault(key, defaultValue string) string {
    28  	if v, ok := os.LookupEnv(key); ok {
    29  		return v
    30  	}
    31  	return defaultValue
    32  }
    33  
    34  func concatStringsArrays(values ...[]string) []string {
    35  	ret := []string{}
    36  	for _, v := range values {
    37  		ret = append(ret, v...)
    38  	}
    39  	return ret
    40  }
    41  
    42  func ensureAbsolutePathFromWorkspace(path string) string {
    43  	if filepath.IsAbs(path) {
    44  		return path
    45  	}
    46  	return filepath.Join(workspaceRoot, path)
    47  }
    48  
    49  func signalContext(parentCtx context.Context, signals ...os.Signal) (ctx context.Context, stop context.CancelFunc) {
    50  	ctx, cancel := context.WithCancel(parentCtx)
    51  	ch := make(chan os.Signal, 1)
    52  	go func() {
    53  		select {
    54  		case <-ch:
    55  			cancel()
    56  		case <-ctx.Done():
    57  		}
    58  	}()
    59  	signal.Notify(ch, signals...)
    60  
    61  	return ctx, cancel
    62  }
    63  
    64  func isLocalPattern(pattern string) bool {
    65  	return build.IsLocalImport(pattern) || filepath.IsAbs(pattern)
    66  }
    67  
    68  func packageID(pattern string) string {
    69  	pattern = path.Clean(pattern)
    70  	if filepath.IsAbs(pattern) {
    71  		if relPath, err := filepath.Rel(workspaceRoot, pattern); err == nil {
    72  			pattern = relPath
    73  		}
    74  	}
    75  
    76  	return fmt.Sprintf("//%s", pattern)
    77  }
    78
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