// RunCommand detects the project root, parses flags and runs the Command.
func RunCommand(fs *flag.FlagSet, cmd *Command, projectroot, goroot string, args []string) error {
if cmd.AddFlags != nil {
cmd.AddFlags(fs)
}
if err := fs.Parse(args); err != nil {
fs.Usage()
os.Exit(1)
}
args = fs.Args() // reset to the remaining arguments
if projectroot == "" {
return fmt.Errorf("project root is blank")
}
root, err := FindProjectroot(projectroot)
if err != nil {
return fmt.Errorf("could not locate project root: %v", err)
}
project := gb.NewProject(root)
gb.Debugf("project root %q", project.Projectdir())
ctx, err := project.NewContext(
gb.GcToolchain(),
)
if err != nil {
return fmt.Errorf("unable to construct context: %v", err)
}
gb.Debugf("args: %v", args)
return cmd.Run(ctx, args)
}
func main() {
root, err := cmd.FindProjectroot(projectroot)
if err != nil {
gb.Fatalf("could not locate project root: %v", err)
}
project := gb.NewProject(root)
gb.Debugf("project root %q", project.Projectdir())
args := os.Args[1:]
if len(args) < 1 || args[0] == "-h" {
fs.Usage()
os.Exit(1)
}
if args[0] == "help" {
help(args[1:])
return
}
for _, command := range commands {
if command.Name == args[0] && command.Runnable() {
// add extra flags if necessary
if command.AddFlags != nil {
command.AddFlags(fs)
}
if command.FlagParse != nil {
err = command.FlagParse(fs, args)
} else {
err = fs.Parse(args[1:])
}
if err != nil {
gb.Fatalf("could not parse flags: %v", err)
}
args = fs.Args() // reset args to the leftovers from fs.Parse
gb.Debugf("args: %v", args)
ctx, err := project.NewContext(
gb.GcToolchain(),
)
if err != nil {
gb.Fatalf("unable to construct context: %v", err)
}
if err := command.Run(ctx, args); err != nil {
gb.Fatalf("command %q failed: %v", command.Name, err)
}
return
}
}
gb.Fatalf("unknown command %q ", args[0])
}
func main() {
args := os.Args
if len(args) < 2 || args[1] == "-h" {
fs.Usage()
os.Exit(1)
}
name := args[1]
if name == "help" {
help(args[2:])
return
}
command, ok := commands[name]
if (command != nil && !command.Runnable()) || !ok {
if _, err := lookupPlugin(name); err != nil {
gb.Errorf("unknown command %q", name)
fs.Usage()
os.Exit(1)
}
command = commands["plugin"]
args = append([]string{"plugin"}, args...)
}
// add extra flags if necessary
if command.AddFlags != nil {
command.AddFlags(fs)
}
var err error
if command.FlagParse != nil {
err = command.FlagParse(fs, args)
} else {
err = fs.Parse(args[2:])
}
if err != nil {
gb.Fatalf("could not parse flags: %v", err)
}
args = fs.Args() // reset args to the leftovers from fs.Parse
cwd, err := filepath.Abs(cwd) // if cwd was passed in via -R, make sure it is absolute
if err != nil {
gb.Fatalf("could not make project root absolute: %v", err)
}
root, err := cmd.FindProjectroot(cwd)
if err != nil {
gb.Fatalf("could not locate project root: %v", err)
}
project := gb.NewProject(root)
gb.Debugf("project root %q", project.Projectdir())
ctx, err := project.NewContext(
gb.GcToolchain(),
gb.Ldflags(ldflags),
)
if err != nil {
gb.Fatalf("unable to construct context: %v", err)
}
if command.ParseArgs != nil {
args = command.ParseArgs(ctx, root, args)
} else {
args = cmd.ImportPaths(ctx, root, args)
}
gb.Debugf("args: %v", args)
if err := command.Run(ctx, args); err != nil {
gb.Fatalf("command %q failed: %v", name, err)
}
}
func testProject(t *testing.T) *gb.Project {
cwd := getwd(t)
root := filepath.Join(cwd, "..", "testdata")
return gb.NewProject(root)
}