/
flags.go
60 lines (51 loc) · 1.11 KB
/
flags.go
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package modules
import (
"flag"
"fmt"
)
var (
// HelpFlag triggers printing flag.Usage. It's exported for custom help handling.
HelpFlag bool
printGraphFlag bool
)
func init() {
flag.BoolVar(&HelpFlag, "help", false, "print help")
flag.BoolVar(&printGraphFlag, "print-module-graph", false, "print the module dependency graph")
}
func parseFlags() error {
// parse flags
flag.Parse()
if HelpFlag {
flag.Usage()
return ErrCleanExit
}
if printGraphFlag {
printGraph()
return ErrCleanExit
}
return nil
}
func printGraph() {
// mark roots
for _, module := range modules {
if len(module.depReverse) == 0 {
// is root, dont print deps in dep tree
module.stopFlag.Set()
}
}
// print
for _, module := range modules {
if module.stopFlag.IsSet() {
// print from root
printModuleGraph("", module, true)
}
}
}
func printModuleGraph(prefix string, module *Module, root bool) {
fmt.Printf("%s├── %s\n", prefix, module.Name)
if root || !module.stopFlag.IsSet() {
for _, dep := range module.Dependencies() {
printModuleGraph(fmt.Sprintf("│ %s", prefix), dep, false)
}
}
}