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https://github.com/golang/go
synced 2024-09-30 04:34:33 -06:00
cmd/dist: use bytes.Buffer for code generation
This belongs to a series of clean-up changes (see below) for cmd/dist. This is change (8). These changes include: (1) apply minor fixes (2) restore behavior of branchtag (3) unleash bootstrap optimization for windows (4) use standard generated code header (5) remove trivial variables + functions (6) move functions for the better (7) simplify code segments (8) use bytes.Buffer for code generation (9) rename variables + functions (10) remove doc.go Change-Id: I2d5a071eb8e14690325612271432fdc5f43b108b Reviewed-on: https://go-review.googlesource.com/61014 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Marvin Stenger
Ian Lance Taylor
parent
822f832d29
commit
88ced02190
55
src/cmd/dist/buildgo.go
vendored
55
src/cmd/dist/buildgo.go
vendored
@ -27,31 +27,29 @@ import (
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// It is invoked to write cmd/go/internal/cfg/zdefaultcc.go
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// but we also write cmd/cgo/zdefaultcc.go
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func mkzdefaultcc(dir, file string) {
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outGo := fmt.Sprintf(
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"// Code generated by go tool dist; DO NOT EDIT.\n"+
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"\n"+
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"package cfg\n"+
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"\n"+
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"const DefaultCC = `%s`\n"+
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"const DefaultCXX = `%s`\n"+
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"const DefaultPkgConfig = `%s`\n",
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defaultcctarget, defaultcxxtarget, defaultpkgconfigtarget)
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var buf bytes.Buffer
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fmt.Fprintf(&buf, "// Code generated by go tool dist; DO NOT EDIT.\n")
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "package cfg\n")
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "const DefaultCC = `%s`\n", defaultcctarget)
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fmt.Fprintf(&buf, "const DefaultCXX = `%s`\n", defaultcxxtarget)
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fmt.Fprintf(&buf, "const DefaultPkgConfig = `%s`\n", defaultpkgconfigtarget)
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writefile(outGo, file, writeSkipSame)
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writefile(buf.String(), file, writeSkipSame)
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buf.Reset()
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// Convert file name to replace: turn go/internal/cfg into cgo.
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outCgo := fmt.Sprintf(
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"// Code generated by go tool dist; DO NOT EDIT.\n"+
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"\n"+
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"package main\n"+
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"\n"+
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"const defaultCC = `%s`\n"+
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"const defaultCXX = `%s`\n"+
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"const defaultPkgConfig = `%s`\n",
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defaultcctarget, defaultcxxtarget, defaultpkgconfigtarget)
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fmt.Fprintf(&buf, "// Code generated by go tool dist; DO NOT EDIT.\n")
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "package main\n")
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "const defaultCC = `%s`\n", defaultcctarget)
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fmt.Fprintf(&buf, "const defaultCXX = `%s`\n", defaultcxxtarget)
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fmt.Fprintf(&buf, "const defaultPkgConfig = `%s`\n", defaultpkgconfigtarget)
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// Convert file name.
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file = strings.Replace(file, filepath.FromSlash("go/internal/cfg"), "cgo", 1)
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writefile(outCgo, file, writeSkipSame)
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writefile(buf.String(), file, writeSkipSame)
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}
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// mkzcgo writes zosarch.go for cmd/go.
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@ -92,14 +90,13 @@ func mkzcgo(dir, file string) {
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sort.Strings(list)
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var buf bytes.Buffer
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fmt.Fprintf(&buf,
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"// Code generated by go tool dist; DO NOT EDIT.\n"+
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"\n"+
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"package build\n"+
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"\n"+
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"const defaultCGO_ENABLED = %q\n\n"+
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"var cgoEnabled = map[string]bool{\n", os.Getenv("CGO_ENABLED"))
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fmt.Fprintf(&buf, "// Code generated by go tool dist; DO NOT EDIT.\n")
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "package build\n")
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "const defaultCGO_ENABLED = %q\n", os.Getenv("CGO_ENABLED"))
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "var cgoEnabled = map[string]bool{\n")
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for _, plat := range list {
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fmt.Fprintf(&buf, "\t%q: true,\n", plat)
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}
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57
src/cmd/dist/buildruntime.go
vendored
57
src/cmd/dist/buildruntime.go
vendored
@ -5,6 +5,7 @@
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package main
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import (
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"bytes"
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"fmt"
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"os"
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"strings"
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@ -24,17 +25,18 @@ import (
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// const StackGuardMultiplier = <multiplier value>
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//
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func mkzversion(dir, file string) {
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out := fmt.Sprintf(
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"// Code generated by go tool dist; DO NOT EDIT.\n"+
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"\n"+
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"package sys\n"+
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"\n"+
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"var DefaultGoroot = `%s`\n\n"+
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"const TheVersion = `%s`\n"+
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"const Goexperiment = `%s`\n"+
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"const StackGuardMultiplier = %d\n\n", goroot_final, findgoversion(), os.Getenv("GOEXPERIMENT"), stackGuardMultiplier())
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var buf bytes.Buffer
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fmt.Fprintf(&buf, "// Code generated by go tool dist; DO NOT EDIT.\n")
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "package sys\n")
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "var DefaultGoroot = `%s`\n", goroot_final)
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "const TheVersion = `%s`\n", findgoversion())
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fmt.Fprintf(&buf, "const Goexperiment = `%s`\n", os.Getenv("GOEXPERIMENT"))
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fmt.Fprintf(&buf, "const StackGuardMultiplier = %d\n", stackGuardMultiplier())
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writefile(out, file, writeSkipSame)
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writefile(buf.String(), file, writeSkipSame)
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}
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// mkzbootstrap writes cmd/internal/objabi/zbootstrap.go:
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@ -61,25 +63,24 @@ func mkzversion(dir, file string) {
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// This is more useful than having it default to generating objects for the
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// original target (in this example, a Mac).
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func mkzbootstrap(file string) {
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out := fmt.Sprintf(
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"// Code generated by go tool dist; DO NOT EDIT.\n"+
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"\n"+
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"package objabi\n"+
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"\n"+
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"import \"runtime\"\n"+
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"\n"+
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"const defaultGOROOT = `%s`\n"+
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"const defaultGO386 = `%s`\n"+
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"const defaultGOARM = `%s`\n"+
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"const defaultGOOS = runtime.GOOS\n"+
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"const defaultGOARCH = runtime.GOARCH\n"+
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"const defaultGO_EXTLINK_ENABLED = `%s`\n"+
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"const version = `%s`\n"+
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"const stackGuardMultiplier = %d\n"+
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"const goexperiment = `%s`\n",
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goroot_final, go386, goarm, goextlinkenabled, findgoversion(), stackGuardMultiplier(), os.Getenv("GOEXPERIMENT"))
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var buf bytes.Buffer
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fmt.Fprintf(&buf, "// Code generated by go tool dist; DO NOT EDIT.\n")
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "package objabi\n")
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "import \"runtime\"\n")
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fmt.Fprintln(&buf)
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fmt.Fprintf(&buf, "const defaultGOROOT = `%s`\n", goroot_final)
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fmt.Fprintf(&buf, "const defaultGO386 = `%s`\n", go386)
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fmt.Fprintf(&buf, "const defaultGOARM = `%s`\n", goarm)
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fmt.Fprintf(&buf, "const defaultGOOS = runtime.GOOS\n")
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fmt.Fprintf(&buf, "const defaultGOARCH = runtime.GOARCH\n")
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fmt.Fprintf(&buf, "const defaultGO_EXTLINK_ENABLED = `%s`\n", goextlinkenabled)
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fmt.Fprintf(&buf, "const version = `%s`\n", findgoversion())
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fmt.Fprintf(&buf, "const stackGuardMultiplier = %d\n", stackGuardMultiplier())
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fmt.Fprintf(&buf, "const goexperiment = `%s`\n", os.Getenv("GOEXPERIMENT"))
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writefile(out, file, writeSkipSame)
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writefile(buf.String(), file, writeSkipSame)
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}
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// stackGuardMultiplier returns a multiplier to apply to the default
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