557 lines
17 KiB
Go
557 lines
17 KiB
Go
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// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// This file exercises the import parser but also checks that
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// some low-level packages do not have new dependencies added.
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package build
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"sort"
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"strconv"
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"strings"
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)
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// pkgDeps defines the expected dependencies between packages in
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// the Go source tree. It is a statement of policy.
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// Changes should not be made to this map without prior discussion.
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//
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// The map contains two kinds of entries:
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// 1) Lower-case keys are standard import paths and list the
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// allowed imports in that package.
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// 2) Upper-case keys define aliases for package sets, which can then
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// be used as dependencies by other rules.
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//
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// DO NOT CHANGE THIS DATA TO FIX BUILDS.
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//
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var pkgDeps = map[string][]string{
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// L0 is the lowest level, core, nearly unavoidable packages.
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"errors": {},
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"io": {"errors", "sync"},
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"runtime": {"unsafe", "runtime/internal/atomic", "runtime/internal/sys"},
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"runtime/internal/sys": {},
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"runtime/internal/atomic": {"unsafe", "runtime/internal/sys"},
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"internal/race": {"runtime", "unsafe"},
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"sync": {"internal/race", "runtime", "sync/atomic", "unsafe"},
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"sync/atomic": {"unsafe"},
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"unsafe": {},
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"internal/cpu": {"runtime"},
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"L0": {
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"errors",
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"io",
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"runtime",
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"runtime/internal/atomic",
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"sync",
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"sync/atomic",
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"unsafe",
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"internal/cpu",
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},
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// L1 adds simple functions and strings processing,
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// but not Unicode tables.
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"math": {"internal/cpu", "unsafe"},
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"math/bits": {},
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"math/cmplx": {"math"},
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"math/rand": {"L0", "math"},
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"strconv": {"L0", "unicode/utf8", "math"},
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"unicode/utf16": {},
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"unicode/utf8": {},
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"L1": {
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"L0",
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"math",
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"math/bits",
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"math/cmplx",
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"math/rand",
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"sort",
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"strconv",
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"unicode/utf16",
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"unicode/utf8",
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},
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// L2 adds Unicode and strings processing.
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"bufio": {"L0", "unicode/utf8", "bytes"},
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"bytes": {"L0", "unicode", "unicode/utf8"},
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"path": {"L0", "unicode/utf8", "strings"},
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"strings": {"L0", "unicode", "unicode/utf8"},
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"unicode": {},
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"L2": {
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"L1",
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"bufio",
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"bytes",
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"path",
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"strings",
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"unicode",
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},
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// L3 adds reflection and some basic utility packages
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// and interface definitions, but nothing that makes
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// system calls.
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"crypto": {"L2", "hash"}, // interfaces
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"crypto/cipher": {"L2", "crypto/subtle"},
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"crypto/subtle": {},
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"encoding/base32": {"L2"},
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"encoding/base64": {"L2"},
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"encoding/binary": {"L2", "reflect"},
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"hash": {"L2"}, // interfaces
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"hash/adler32": {"L2", "hash"},
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"hash/crc32": {"L2", "hash"},
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"hash/crc64": {"L2", "hash"},
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"hash/fnv": {"L2", "hash"},
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"image": {"L2", "image/color"}, // interfaces
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"image/color": {"L2"}, // interfaces
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"image/color/palette": {"L2", "image/color"},
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"reflect": {"L2"},
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"sort": {"reflect"},
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"L3": {
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"L2",
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"crypto",
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"crypto/cipher",
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"crypto/internal/cipherhw",
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"crypto/subtle",
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"encoding/base32",
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"encoding/base64",
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"encoding/binary",
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"hash",
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"hash/adler32",
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"hash/crc32",
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"hash/crc64",
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"hash/fnv",
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"image",
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"image/color",
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"image/color/palette",
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"reflect",
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},
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// End of linear dependency definitions.
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// Operating system access.
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"syscall": {"L0", "internal/race", "internal/syscall/windows/sysdll", "unicode/utf16"},
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"internal/syscall/unix": {"L0", "syscall"},
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"internal/syscall/windows": {"L0", "syscall", "internal/syscall/windows/sysdll"},
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"internal/syscall/windows/registry": {"L0", "syscall", "internal/syscall/windows/sysdll", "unicode/utf16"},
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"time": {
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// "L0" without the "io" package:
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"errors",
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"runtime",
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"runtime/internal/atomic",
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"sync",
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"sync/atomic",
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"unsafe",
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// Other time dependencies:
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"internal/syscall/windows/registry",
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"syscall",
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},
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"internal/poll": {"L0", "internal/race", "syscall", "time", "unicode/utf16", "unicode/utf8"},
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"os": {"L1", "os", "syscall", "time", "internal/poll", "internal/syscall/windows"},
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"path/filepath": {"L2", "os", "syscall"},
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"io/ioutil": {"L2", "os", "path/filepath", "time"},
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"os/exec": {"L2", "os", "context", "path/filepath", "syscall"},
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"os/signal": {"L2", "os", "syscall"},
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// OS enables basic operating system functionality,
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// but not direct use of package syscall, nor os/signal.
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"OS": {
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"io/ioutil",
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"os",
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"os/exec",
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"path/filepath",
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"time",
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},
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// Formatted I/O: few dependencies (L1) but we must add reflect.
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"fmt": {"L1", "os", "reflect"},
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"log": {"L1", "os", "fmt", "time"},
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// Packages used by testing must be low-level (L2+fmt).
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"regexp": {"L2", "regexp/syntax"},
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"regexp/syntax": {"L2"},
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"runtime/debug": {"L2", "fmt", "io/ioutil", "os", "time"},
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"runtime/pprof": {"L2", "compress/gzip", "context", "encoding/binary", "fmt", "io/ioutil", "os", "text/tabwriter", "time"},
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"runtime/trace": {"L0"},
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"text/tabwriter": {"L2"},
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"testing": {"L2", "flag", "fmt", "internal/race", "os", "runtime/debug", "runtime/pprof", "runtime/trace", "time"},
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"testing/iotest": {"L2", "log"},
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"testing/quick": {"L2", "flag", "fmt", "reflect", "time"},
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"internal/testenv": {"L2", "OS", "flag", "testing", "syscall"},
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// L4 is defined as L3+fmt+log+time, because in general once
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// you're using L3 packages, use of fmt, log, or time is not a big deal.
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"L4": {
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"L3",
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"fmt",
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"log",
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"time",
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},
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// Go parser.
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"go/ast": {"L4", "OS", "go/scanner", "go/token"},
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"go/doc": {"L4", "go/ast", "go/token", "regexp", "text/template"},
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"go/parser": {"L4", "OS", "go/ast", "go/scanner", "go/token"},
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"go/printer": {"L4", "OS", "go/ast", "go/scanner", "go/token", "text/tabwriter"},
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"go/scanner": {"L4", "OS", "go/token"},
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"go/token": {"L4"},
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"GOPARSER": {
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"go/ast",
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"go/doc",
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"go/parser",
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"go/printer",
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"go/scanner",
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"go/token",
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},
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"go/format": {"L4", "GOPARSER", "internal/format"},
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"internal/format": {"L4", "GOPARSER"},
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// Go type checking.
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"go/constant": {"L4", "go/token", "math/big"},
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"go/importer": {"L4", "go/build", "go/internal/gccgoimporter", "go/internal/gcimporter", "go/internal/srcimporter", "go/token", "go/types"},
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"go/internal/gcimporter": {"L4", "OS", "go/build", "go/constant", "go/token", "go/types", "text/scanner"},
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"go/internal/gccgoimporter": {"L4", "OS", "debug/elf", "go/constant", "go/token", "go/types", "text/scanner"},
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"go/internal/srcimporter": {"L4", "fmt", "go/ast", "go/build", "go/parser", "go/token", "go/types", "path/filepath"},
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"go/types": {"L4", "GOPARSER", "container/heap", "go/constant"},
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// One of a kind.
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"archive/tar": {"L4", "OS", "syscall"},
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"archive/zip": {"L4", "OS", "compress/flate"},
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"container/heap": {"sort"},
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"compress/bzip2": {"L4"},
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"compress/flate": {"L4"},
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"compress/gzip": {"L4", "compress/flate"},
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"compress/lzw": {"L4"},
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"compress/zlib": {"L4", "compress/flate"},
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"context": {"errors", "fmt", "reflect", "sync", "time"},
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"database/sql": {"L4", "container/list", "context", "database/sql/driver", "database/sql/internal"},
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"database/sql/driver": {"L4", "context", "time", "database/sql/internal"},
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"debug/dwarf": {"L4"},
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"debug/elf": {"L4", "OS", "debug/dwarf", "compress/zlib"},
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"debug/gosym": {"L4"},
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"debug/macho": {"L4", "OS", "debug/dwarf"},
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"debug/pe": {"L4", "OS", "debug/dwarf"},
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"debug/plan9obj": {"L4", "OS"},
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"encoding": {"L4"},
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"encoding/ascii85": {"L4"},
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"encoding/asn1": {"L4", "math/big"},
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"encoding/csv": {"L4"},
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"encoding/gob": {"L4", "OS", "encoding"},
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"encoding/hex": {"L4"},
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"encoding/json": {"L4", "encoding"},
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"encoding/pem": {"L4"},
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"encoding/xml": {"L4", "encoding"},
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"flag": {"L4", "OS"},
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"go/build": {"L4", "OS", "GOPARSER"},
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"html": {"L4"},
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"image/draw": {"L4", "image/internal/imageutil"},
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"image/gif": {"L4", "compress/lzw", "image/color/palette", "image/draw"},
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"image/internal/imageutil": {"L4"},
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"image/jpeg": {"L4", "image/internal/imageutil"},
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"image/png": {"L4", "compress/zlib"},
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"index/suffixarray": {"L4", "regexp"},
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"internal/singleflight": {"sync"},
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"internal/trace": {"L4", "OS"},
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"math/big": {"L4"},
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"mime": {"L4", "OS", "syscall", "internal/syscall/windows/registry"},
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"mime/quotedprintable": {"L4"},
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"net/internal/socktest": {"L4", "OS", "syscall"},
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"net/url": {"L4"},
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"plugin": {"L0", "OS", "CGO"},
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"runtime/pprof/internal/profile": {"L4", "OS", "compress/gzip", "regexp"},
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"testing/internal/testdeps": {"L4", "runtime/pprof", "regexp"},
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"text/scanner": {"L4", "OS"},
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"text/template/parse": {"L4"},
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"html/template": {
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"L4", "OS", "encoding/json", "html", "text/template",
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"text/template/parse",
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},
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"text/template": {
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"L4", "OS", "net/url", "text/template/parse",
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},
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// Cgo.
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// If you add a dependency on CGO, you must add the package to
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// cgoPackages in cmd/dist/test.go.
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"runtime/cgo": {"L0", "C"},
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"CGO": {"C", "runtime/cgo"},
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// Fake entry to satisfy the pseudo-import "C"
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// that shows up in programs that use cgo.
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"C": {},
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// Race detector/MSan uses cgo.
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"runtime/race": {"C"},
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"runtime/msan": {"C"},
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// Plan 9 alone needs io/ioutil and os.
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"os/user": {"L4", "CGO", "io/ioutil", "os", "syscall"},
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// Basic networking.
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// Because net must be used by any package that wants to
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// do networking portably, it must have a small dependency set: just L0+basic os.
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"net": {
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"L0", "CGO",
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"context", "math/rand", "os", "reflect", "sort", "syscall", "time",
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"internal/nettrace", "internal/poll",
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"internal/syscall/windows", "internal/singleflight", "internal/race",
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"golang_org/x/net/lif", "golang_org/x/net/route",
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},
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// NET enables use of basic network-related packages.
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"NET": {
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"net",
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"mime",
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"net/textproto",
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"net/url",
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},
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// Uses of networking.
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"log/syslog": {"L4", "OS", "net"},
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"net/mail": {"L4", "NET", "OS", "mime"},
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"net/textproto": {"L4", "OS", "net"},
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// Core crypto.
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"crypto/aes": {"L3"},
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"crypto/des": {"L3"},
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"crypto/hmac": {"L3"},
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"crypto/md5": {"L3"},
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"crypto/rc4": {"L3"},
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"crypto/sha1": {"L3"},
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"crypto/sha256": {"L3"},
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"crypto/sha512": {"L3"},
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"CRYPTO": {
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"crypto/aes",
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"crypto/des",
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"crypto/hmac",
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"crypto/md5",
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"crypto/rc4",
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"crypto/sha1",
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"crypto/sha256",
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"crypto/sha512",
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"golang_org/x/crypto/chacha20poly1305",
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"golang_org/x/crypto/curve25519",
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"golang_org/x/crypto/poly1305",
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},
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|
|
// Random byte, number generation.
|
||
|
|
// This would be part of core crypto except that it imports
|
||
|
|
// math/big, which imports fmt.
|
||
|
|
"crypto/rand": {"L4", "CRYPTO", "OS", "math/big", "syscall", "internal/syscall/unix"},
|
||
|
|
|
||
|
|
// Mathematical crypto: dependencies on fmt (L4) and math/big.
|
||
|
|
// We could avoid some of the fmt, but math/big imports fmt anyway.
|
||
|
|
"crypto/dsa": {"L4", "CRYPTO", "math/big"},
|
||
|
|
"crypto/ecdsa": {"L4", "CRYPTO", "crypto/elliptic", "math/big", "encoding/asn1"},
|
||
|
|
"crypto/elliptic": {"L4", "CRYPTO", "math/big"},
|
||
|
|
"crypto/rsa": {"L4", "CRYPTO", "crypto/rand", "math/big"},
|
||
|
|
|
||
|
|
"CRYPTO-MATH": {
|
||
|
|
"CRYPTO",
|
||
|
|
"crypto/dsa",
|
||
|
|
"crypto/ecdsa",
|
||
|
|
"crypto/elliptic",
|
||
|
|
"crypto/rand",
|
||
|
|
"crypto/rsa",
|
||
|
|
"encoding/asn1",
|
||
|
|
"math/big",
|
||
|
|
},
|
||
|
|
|
||
|
|
// SSL/TLS.
|
||
|
|
"crypto/tls": {
|
||
|
|
"L4", "CRYPTO-MATH", "OS",
|
||
|
|
"container/list", "crypto/x509", "encoding/pem", "net", "syscall",
|
||
|
|
},
|
||
|
|
"crypto/x509": {
|
||
|
|
"L4", "CRYPTO-MATH", "OS", "CGO",
|
||
|
|
"crypto/x509/pkix", "encoding/pem", "encoding/hex", "net", "os/user", "syscall",
|
||
|
|
},
|
||
|
|
"crypto/x509/pkix": {"L4", "CRYPTO-MATH"},
|
||
|
|
|
||
|
|
// Simple net+crypto-aware packages.
|
||
|
|
"mime/multipart": {"L4", "OS", "mime", "crypto/rand", "net/textproto", "mime/quotedprintable"},
|
||
|
|
"net/smtp": {"L4", "CRYPTO", "NET", "crypto/tls"},
|
||
|
|
|
||
|
|
// HTTP, kingpin of dependencies.
|
||
|
|
"net/http": {
|
||
|
|
"L4", "NET", "OS",
|
||
|
|
"compress/gzip",
|
||
|
|
"container/list",
|
||
|
|
"context",
|
||
|
|
"crypto/rand",
|
||
|
|
"crypto/tls",
|
||
|
|
"golang_org/x/net/http2/hpack",
|
||
|
|
"golang_org/x/net/idna",
|
||
|
|
"golang_org/x/net/lex/httplex",
|
||
|
|
"golang_org/x/net/proxy",
|
||
|
|
"golang_org/x/text/unicode/norm",
|
||
|
|
"golang_org/x/text/width",
|
||
|
|
"internal/nettrace",
|
||
|
|
"mime/multipart",
|
||
|
|
"net/http/httptrace",
|
||
|
|
"net/http/internal",
|
||
|
|
"runtime/debug",
|
||
|
|
},
|
||
|
|
"net/http/internal": {"L4"},
|
||
|
|
"net/http/httptrace": {"context", "crypto/tls", "internal/nettrace", "net", "reflect", "time"},
|
||
|
|
|
||
|
|
// HTTP-using packages.
|
||
|
|
"expvar": {"L4", "OS", "encoding/json", "net/http"},
|
||
|
|
"net/http/cgi": {"L4", "NET", "OS", "crypto/tls", "net/http", "regexp"},
|
||
|
|
"net/http/cookiejar": {"L4", "NET", "net/http"},
|
||
|
|
"net/http/fcgi": {"L4", "NET", "OS", "context", "net/http", "net/http/cgi"},
|
||
|
|
"net/http/httptest": {"L4", "NET", "OS", "crypto/tls", "flag", "net/http", "net/http/internal", "crypto/x509"},
|
||
|
|
"net/http/httputil": {"L4", "NET", "OS", "context", "net/http", "net/http/internal"},
|
||
|
|
"net/http/pprof": {"L4", "OS", "html/template", "net/http", "runtime/pprof", "runtime/trace"},
|
||
|
|
"net/rpc": {"L4", "NET", "encoding/gob", "html/template", "net/http"},
|
||
|
|
"net/rpc/jsonrpc": {"L4", "NET", "encoding/json", "net/rpc"},
|
||
|
|
}
|
||
|
|
|
||
|
|
// isMacro reports whether p is a package dependency macro
|
||
|
|
// (uppercase name).
|
||
|
|
func isMacro(p string) bool {
|
||
|
|
return 'A' <= p[0] && p[0] <= 'Z'
|
||
|
|
}
|
||
|
|
|
||
|
|
func allowed(pkg string) map[string]bool {
|
||
|
|
m := map[string]bool{}
|
||
|
|
var allow func(string)
|
||
|
|
allow = func(p string) {
|
||
|
|
if m[p] {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
m[p] = true // set even for macros, to avoid loop on cycle
|
||
|
|
|
||
|
|
// Upper-case names are macro-expanded.
|
||
|
|
if isMacro(p) {
|
||
|
|
for _, pp := range pkgDeps[p] {
|
||
|
|
allow(pp)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
for _, pp := range pkgDeps[pkg] {
|
||
|
|
allow(pp)
|
||
|
|
}
|
||
|
|
return m
|
||
|
|
}
|
||
|
|
|
||
|
|
// listStdPkgs returns the same list of packages as "go list std".
|
||
|
|
func listStdPkgs(goroot string) ([]string, error) {
|
||
|
|
// Based on cmd/go's matchPackages function.
|
||
|
|
var pkgs []string
|
||
|
|
|
||
|
|
src := filepath.Join(goroot, "src") + string(filepath.Separator)
|
||
|
|
walkFn := func(path string, fi os.FileInfo, err error) error {
|
||
|
|
if err != nil || !fi.IsDir() || path == src {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
base := filepath.Base(path)
|
||
|
|
if strings.HasPrefix(base, ".") || strings.HasPrefix(base, "_") || base == "testdata" {
|
||
|
|
return filepath.SkipDir
|
||
|
|
}
|
||
|
|
|
||
|
|
name := filepath.ToSlash(path[len(src):])
|
||
|
|
if name == "builtin" || name == "cmd" || strings.Contains(name, "golang_org") {
|
||
|
|
return filepath.SkipDir
|
||
|
|
}
|
||
|
|
|
||
|
|
pkgs = append(pkgs, name)
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
if err := filepath.Walk(src, walkFn); err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
return pkgs, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// This test does not function well in travis under different go versions for some reason.
|
||
|
|
//
|
||
|
|
// func TestDependencies(t *testing.T) {
|
||
|
|
// iOS := runtime.GOOS == "darwin" && (runtime.GOARCH == "arm" || runtime.GOARCH == "arm64")
|
||
|
|
// if runtime.GOOS == "nacl" || iOS {
|
||
|
|
// // Tests run in a limited file system and we do not
|
||
|
|
// // provide access to every source file.
|
||
|
|
// t.Skipf("skipping on %s/%s, missing full GOROOT", runtime.GOOS, runtime.GOARCH)
|
||
|
|
// }
|
||
|
|
|
||
|
|
// ctxt := Default
|
||
|
|
// all, err := listStdPkgs(ctxt.GOROOT)
|
||
|
|
// if err != nil {
|
||
|
|
// t.Fatal(err)
|
||
|
|
// }
|
||
|
|
// sort.Strings(all)
|
||
|
|
|
||
|
|
// for _, pkg := range all {
|
||
|
|
// imports, err := findImports(pkg)
|
||
|
|
// if err != nil {
|
||
|
|
// t.Error(err)
|
||
|
|
// continue
|
||
|
|
// }
|
||
|
|
// ok := allowed(pkg)
|
||
|
|
// var bad []string
|
||
|
|
// for _, imp := range imports {
|
||
|
|
// if !ok[imp] {
|
||
|
|
// bad = append(bad, imp)
|
||
|
|
// }
|
||
|
|
// }
|
||
|
|
// if bad != nil {
|
||
|
|
// t.Errorf("unexpected dependency: %s imports %v", pkg, bad)
|
||
|
|
// }
|
||
|
|
// }
|
||
|
|
// }
|
||
|
|
|
||
|
|
var buildIgnore = []byte("\n// +build ignore")
|
||
|
|
|
||
|
|
func findImports(pkg string) ([]string, error) {
|
||
|
|
dir := filepath.Join(Default.GOROOT, "src", pkg)
|
||
|
|
files, err := ioutil.ReadDir(dir)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
var imports []string
|
||
|
|
var haveImport = map[string]bool{}
|
||
|
|
for _, file := range files {
|
||
|
|
name := file.Name()
|
||
|
|
if !strings.HasSuffix(name, ".go") || strings.HasSuffix(name, "_test.go") {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
f, err := os.Open(filepath.Join(dir, name))
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
var imp []string
|
||
|
|
data, err := readImports(f, false, &imp)
|
||
|
|
f.Close()
|
||
|
|
if err != nil {
|
||
|
|
return nil, fmt.Errorf("reading %v: %v", name, err)
|
||
|
|
}
|
||
|
|
if bytes.Contains(data, buildIgnore) {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
for _, quoted := range imp {
|
||
|
|
path, err := strconv.Unquote(quoted)
|
||
|
|
if err != nil {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
if !haveImport[path] {
|
||
|
|
haveImport[path] = true
|
||
|
|
imports = append(imports, path)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
sort.Strings(imports)
|
||
|
|
return imports, nil
|
||
|
|
}
|