func compilePkg()

in go/tools/builders/compilepkg.go [34:147]
105 lines of code
16 McCabe index (conditional complexity)

func compilePkg(args []string) error {
	// Parse arguments.
	args, err := expandParamsFiles(args)
	if err != nil {
		return err
	}

	fs := flag.NewFlagSet("GoCompilePkg", flag.ExitOnError)
	goenv := envFlags(fs)
	var unfilteredSrcs, coverSrcs, embedSrcs multiFlag
	var deps archiveMultiFlag
	var importPath, packagePath, nogoPath, packageListPath, coverMode string
	var outPath, outFactsPath, cgoExportHPath string
	var testFilter string
	var gcFlags, asmFlags, cppFlags, cFlags, cxxFlags, objcFlags, objcxxFlags, ldFlags quoteMultiFlag
	fs.Var(&unfilteredSrcs, "src", ".go, .c, .cc, .m, .mm, .s, or .S file to be filtered and compiled")
	fs.Var(&coverSrcs, "cover", ".go file that should be instrumented for coverage (must also be a -src)")
	fs.Var(&embedSrcs, "embedsrc", "file that may be compiled into the package with a //go:embed directive")
	fs.Var(&deps, "arc", "Import path, package path, and file name of a direct dependency, separated by '='")
	fs.StringVar(&importPath, "importpath", "", "The import path of the package being compiled. Not passed to the compiler, but may be displayed in debug data.")
	fs.StringVar(&packagePath, "p", "", "The package path (importmap) of the package being compiled")
	fs.Var(&gcFlags, "gcflags", "Go compiler flags")
	fs.Var(&asmFlags, "asmflags", "Go assembler flags")
	fs.Var(&cppFlags, "cppflags", "C preprocessor flags")
	fs.Var(&cFlags, "cflags", "C compiler flags")
	fs.Var(&cxxFlags, "cxxflags", "C++ compiler flags")
	fs.Var(&objcFlags, "objcflags", "Objective-C compiler flags")
	fs.Var(&objcxxFlags, "objcxxflags", "Objective-C++ compiler flags")
	fs.Var(&ldFlags, "ldflags", "C linker flags")
	fs.StringVar(&nogoPath, "nogo", "", "The nogo binary. If unset, nogo will not be run.")
	fs.StringVar(&packageListPath, "package_list", "", "The file containing the list of standard library packages")
	fs.StringVar(&coverMode, "cover_mode", "", "The coverage mode to use. Empty if coverage instrumentation should not be added.")
	fs.StringVar(&outPath, "o", "", "The output archive file to write compiled code")
	fs.StringVar(&outFactsPath, "x", "", "The output archive file to write export data and nogo facts")
	fs.StringVar(&cgoExportHPath, "cgoexport", "", "The _cgo_exports.h file to write")
	fs.StringVar(&testFilter, "testfilter", "off", "Controls test package filtering")
	if err := fs.Parse(args); err != nil {
		return err
	}
	if err := goenv.checkFlags(); err != nil {
		return err
	}
	if importPath == "" {
		importPath = packagePath
	}
	cgoEnabled := os.Getenv("CGO_ENABLED") == "1"
	cc := os.Getenv("CC")
	outPath = abs(outPath)
	for i := range unfilteredSrcs {
		unfilteredSrcs[i] = abs(unfilteredSrcs[i])
	}
	for i := range embedSrcs {
		embedSrcs[i] = abs(embedSrcs[i])
	}
	for i := range coverSrcs {
		coverSrcs[i] = abs(coverSrcs[i])
	}

	// Filter sources.
	srcs, err := filterAndSplitFiles(unfilteredSrcs)
	if err != nil {
		return err
	}

	// TODO(jayconrod): remove -testfilter flag. The test action should compile
	// the main, internal, and external packages by calling compileArchive
	// with the correct sources for each.
	switch testFilter {
	case "off":
	case "only":
		testSrcs := make([]fileInfo, 0, len(srcs.goSrcs))
		for _, f := range srcs.goSrcs {
			if strings.HasSuffix(f.pkg, "_test") {
				testSrcs = append(testSrcs, f)
			}
		}
		srcs.goSrcs = testSrcs
	case "exclude":
		libSrcs := make([]fileInfo, 0, len(srcs.goSrcs))
		for _, f := range srcs.goSrcs {
			if !strings.HasSuffix(f.pkg, "_test") {
				libSrcs = append(libSrcs, f)
			}
		}
		srcs.goSrcs = libSrcs
	default:
		return fmt.Errorf("invalid test filter %q", testFilter)
	}

	return compileArchive(
		goenv,
		importPath,
		packagePath,
		srcs,
		deps,
		coverMode,
		coverSrcs,
		embedSrcs,
		cgoEnabled,
		cc,
		gcFlags,
		asmFlags,
		cppFlags,
		cFlags,
		cxxFlags,
		objcFlags,
		objcxxFlags,
		ldFlags,
		nogoPath,
		packageListPath,
		outPath,
		outFactsPath,
		cgoExportHPath)
}