272 lines
6.7 KiB
Go
272 lines
6.7 KiB
Go
/*
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* Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package build
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import (
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"fmt"
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"go/token"
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"log"
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"os"
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"os/exec"
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"path"
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"path/filepath"
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"runtime"
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"strings"
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"golang.org/x/tools/go/packages"
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"golang.org/x/tools/go/ssa"
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"github.com/goplus/llgo/cl"
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"github.com/goplus/llgo/x/clang"
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llssa "github.com/goplus/llgo/ssa"
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)
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type Mode int
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const (
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ModeBuild Mode = iota
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ModeInstall
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ModeRun
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)
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func needLLFile(mode Mode) bool {
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return mode != ModeBuild
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}
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type Config struct {
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BinPath string
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AppExt string // ".exe" on Windows, empty on Unix
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OutFile string // only valid for ModeBuild when len(pkgs) == 1
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RunArgs []string // only valid for ModeRun
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Mode Mode
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}
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func NewDefaultConf(mode Mode) *Config {
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bin := os.Getenv("GOBIN")
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if bin == "" {
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bin = filepath.Join(runtime.GOROOT(), "bin")
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}
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conf := &Config{
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BinPath: bin,
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Mode: mode,
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AppExt: DefaultAppExt(),
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}
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return conf
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}
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func DefaultAppExt() string {
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if runtime.GOOS == "windows" {
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return ".exe"
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}
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return ""
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}
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// -----------------------------------------------------------------------------
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const (
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loadFiles = packages.NeedName | packages.NeedFiles | packages.NeedCompiledGoFiles
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loadImports = loadFiles | packages.NeedImports
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loadTypes = loadImports | packages.NeedTypes | packages.NeedTypesSizes
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loadSyntax = loadTypes | packages.NeedSyntax | packages.NeedTypesInfo
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)
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func Do(args []string, conf *Config) {
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flags, patterns, verbose := ParseArgs(args, buildFlags)
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cfg := &packages.Config{
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Mode: loadSyntax | packages.NeedDeps | packages.NeedExportFile,
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BuildFlags: flags,
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}
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if patterns == nil {
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patterns = []string{"."}
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}
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initial, err := packages.Load(cfg, patterns...)
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check(err)
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// Create SSA-form program representation.
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ssaProg, pkgs, errPkgs := allPkgs(initial, ssa.SanityCheckFunctions)
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ssaProg.Build()
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for _, errPkg := range errPkgs {
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log.Println("cannot build SSA for package", errPkg)
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}
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llssa.Initialize(llssa.InitAll)
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if verbose {
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llssa.SetDebug(llssa.DbgFlagAll)
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cl.SetDebug(cl.DbgFlagAll)
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}
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prog := llssa.NewProgram(nil)
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mode := conf.Mode
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if mode == ModeBuild && len(initial) == 1 {
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mode = ModeInstall
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}
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for _, pkg := range pkgs {
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buildPkg(prog, pkg, mode, verbose)
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}
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if mode != ModeBuild {
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for _, pkg := range initial {
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if pkg.Name == "main" {
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linkMainPkg(pkg, conf, mode, verbose)
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}
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}
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}
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}
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func linkMainPkg(pkg *packages.Package, conf *Config, mode Mode, verbose bool) {
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pkgPath := pkg.PkgPath
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name := path.Base(pkgPath)
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app := conf.OutFile
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if app == "" {
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app = filepath.Join(conf.BinPath, name+conf.AppExt)
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}
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const N = 3
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args := make([]string, N, len(pkg.Imports)+(N+1))
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args[0] = "-o"
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args[1] = app
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args[2] = "-Wno-override-module"
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packages.Visit([]*packages.Package{pkg}, nil, func(p *packages.Package) {
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if p.PkgPath != "unsafe" { // TODO(xsw): maybe can remove this special case
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args = append(args, p.ExportFile+".ll")
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}
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})
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// TODO(xsw): show work
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// fmt.Fprintln(os.Stderr, "clang", args)
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if verbose {
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fmt.Fprintln(os.Stderr, "#", pkgPath)
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}
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err := clang.New("").Exec(args...)
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check(err)
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if mode == ModeRun {
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cmd := exec.Command(app, conf.RunArgs...)
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cmd.Stdin = os.Stdin
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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cmd.Run()
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}
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}
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func buildPkg(prog llssa.Program, aPkg aPackage, mode Mode, verbose bool) {
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pkg := aPkg.Package
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pkgPath := pkg.PkgPath
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if verbose {
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fmt.Fprintln(os.Stderr, pkgPath)
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}
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if pkgPath == "unsafe" { // TODO(xsw): maybe can remove this special case
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return
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}
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ret, err := cl.NewPackage(prog, aPkg.SSA, pkg.Syntax)
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check(err)
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if needLLFile(mode) {
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file := pkg.ExportFile + ".ll"
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os.WriteFile(file, []byte(ret.String()), 0644)
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}
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}
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type aPackage struct {
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*packages.Package
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SSA *ssa.Package
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}
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func allPkgs(initial []*packages.Package, mode ssa.BuilderMode) (prog *ssa.Program, all []aPackage, errs []*packages.Package) {
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var fset *token.FileSet
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if len(initial) > 0 {
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fset = initial[0].Fset
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}
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prog = ssa.NewProgram(fset, mode)
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packages.Visit(initial, nil, func(p *packages.Package) {
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if p.Types != nil && !p.IllTyped {
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ssaPkg := prog.CreatePackage(p.Types, p.Syntax, p.TypesInfo, true)
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all = append(all, aPackage{p, ssaPkg})
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} else {
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errs = append(errs, p)
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}
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})
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return
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}
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var (
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// TODO(xsw): complete build flags
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buildFlags = map[string]bool{
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"-C": true, // -C dir: Change to dir before running the command
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"-a": false, // -a: force rebuilding of packages that are already up-to-date
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"-n": false, // -n: print the commands but do not run them
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"-p": true, // -p n: the number of programs to run in parallel
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"-race": false, // -race: enable data race detection
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"-cover": false, // -cover: enable coverage analysis
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"-covermode": true, // -covermode mode: set the mode for coverage analysis
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"-v": false, // -v: print the names of packages as they are compiled
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"-work": false, // -work: print the name of the temporary work directory and do not delete it when exiting
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"-x": false, // -x: print the commands
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"-tags": true, // -tags 'tag,list': a space-separated list of build tags to consider satisfied during the build
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"-pkgdir": true, // -pkgdir dir: install and load all packages from dir instead of the usual locations
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}
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)
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func ParseArgs(args []string, swflags map[string]bool) (flags, patterns []string, verbose bool) {
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n := len(args)
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for i := 0; i < n; i++ {
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arg := args[i]
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if strings.HasPrefix(arg, "-") {
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checkFlag(arg, &i, &verbose, swflags)
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} else {
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flags, patterns = args[:i], args[i:]
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return
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}
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}
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flags = args
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return
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}
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func SkipFlagArgs(args []string) int {
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n := len(args)
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for i := 0; i < n; i++ {
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arg := args[i]
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if strings.HasPrefix(arg, "-") {
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checkFlag(arg, &i, nil, buildFlags)
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} else {
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return i
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}
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}
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return -1
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}
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func checkFlag(arg string, i *int, verbose *bool, swflags map[string]bool) {
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if hasarg, ok := swflags[arg]; ok {
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if hasarg {
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*i++
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} else if verbose != nil && arg == "-v" {
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*verbose = true
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}
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} else {
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panic("unknown flag: " + arg)
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}
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}
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func check(err error) {
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if err != nil {
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panic(err)
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}
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}
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// -----------------------------------------------------------------------------
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