1 package parser 2 3 import ( 4 "bytes" 5 "strconv" 6 ) 7 8 // Content of this file was copied from the package golang.org/x/mod/modfile 9 // https://github.com/golang/mod/blob/v0.2.0/modfile/read.go#L877 10 // Under the BSD-3-Clause licence: 11 // golang.org/x/mod@v0.2.0/LICENSE 12 /* 13 Copyright (c) 2009 The Go Authors. All rights reserved. 14 15 Redistribution and use in source and binary forms, with or without 16 modification, are permitted provided that the following conditions are 17 met: 18 19 * Redistributions of source code must retain the above copyright 20 notice, this list of conditions and the following disclaimer. 21 * Redistributions in binary form must reproduce the above 22 copyright notice, this list of conditions and the following disclaimer 23 in the documentation and/or other materials provided with the 24 distribution. 25 * Neither the name of Google Inc. nor the names of its 26 contributors may be used to endorse or promote products derived from 27 this software without specific prior written permission. 28 29 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42 var ( 43 slashSlash = []byte("//") 44 moduleStr = []byte("module") 45 ) 46 47 // modulePath returns the module path from the gomod file text. 48 // If it cannot find a module path, it returns an empty string. 49 // It is tolerant of unrelated problems in the go.mod file. 50 func modulePath(mod []byte) string { 51 for len(mod) > 0 { 52 line := mod 53 mod = nil 54 if i := bytes.IndexByte(line, '\n'); i >= 0 { 55 line, mod = line[:i], line[i+1:] 56 } 57 if i := bytes.Index(line, slashSlash); i >= 0 { 58 line = line[:i] 59 } 60 line = bytes.TrimSpace(line) 61 if !bytes.HasPrefix(line, moduleStr) { 62 continue 63 } 64 line = line[len(moduleStr):] 65 n := len(line) 66 line = bytes.TrimSpace(line) 67 if len(line) == n || len(line) == 0 { 68 continue 69 } 70 71 if line[0] == '"' || line[0] == '`' { 72 p, err := strconv.Unquote(string(line)) 73 if err != nil { 74 return "" // malformed quoted string or multiline module path 75 } 76 return p 77 } 78 79 return string(line) 80 } 81 return "" // missing module path 82 } 83