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// Copyright 2017 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package bazel provides utilities for interacting with the surrounding Bazel environment.
package bazel
import (
"fmt"
"io/ioutil"
"os"
)
const TEST_SRCDIR = "TEST_SRCDIR"
const TEST_TMPDIR = "TEST_TMPDIR"
const TEST_WORKSPACE = "TEST_WORKSPACE"
// NewTmpDir creates a new temporary directory in TestTmpDir().
func NewTmpDir(prefix string) (string, error) {
return ioutil.TempDir(TestTmpDir(), prefix)
}
// TestTmpDir returns the path the Bazel test temp directory.
// If TEST_TMPDIR is not defined, it returns the OS default temp dir.
func TestTmpDir() string {
if tmp, ok := os.LookupEnv(TEST_TMPDIR); ok {
return tmp
}
return os.TempDir()
}
// SpliceDelimitedOSArgs is a utility function that scans the os.Args list for
// entries delimited by the begin and end delimiters (typically the values
// "-begin_files" and "-end_files" are used). Entries between these delimiters
// are spliced out of from os.Args and returned to the caller. If the ordering
// of -begin_files or -end_files is malformed, error is returned.
func SpliceDelimitedOSArgs(begin, end string) ([]string, error) {
var files []string
beginFiles, endFiles := -1, -1
for i, arg := range os.Args {
if arg == begin {
beginFiles = i
} else if arg == end {
endFiles = i
break
} else if arg == "--" {
break
}
}
if beginFiles >= 0 && endFiles < 0 ||
beginFiles < 0 && endFiles >= 0 ||
beginFiles >= 0 && beginFiles >= endFiles {
return nil, fmt.Errorf("error: %s, %s not set together or in order", begin, end)
}
if beginFiles >= 0 {
files = os.Args[beginFiles+1 : endFiles]
os.Args = append(os.Args[:beginFiles:beginFiles], os.Args[endFiles+1:]...)
}
return files, nil
}
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