package main

import (
	"errors"
	"fmt"
	"os"
	"path/filepath"

	"go.wit.com/lib/gui/shell"
	"go.wit.com/log"
)

func purgeGoCaches() {
	homedir, err := os.UserHomeDir()
	if err != nil {
		badExit(nil, err)
	}
	pkgdir := filepath.Join(homedir, "go/pkg")
	var cmd []string
	cmd = []string{"chmod", "700", "-R", pkgdir}
	runStrict("", cmd)
	cmd = []string{"rm", "-rf", pkgdir}
	runStrict("", cmd)
	builddir := filepath.Join(homedir, ".cache/go-build")
	cmd = []string{"rm", "-rf", builddir}
	runStrict("", cmd)

	// this can't have really happened
	// echo this still failed in:
	// echo "Linux hpdev2.grid.wit.com 6.9.8-rt-amd64 #1 SMP PREEMPT_RT Debian 6.9.8-1 (2024-07-07) x86_64 GNU/Linux"
	// echo and I had to drop the caches after building go install binaries quickly and running them
	// echo "as an os.Exec() between binaries"
	// echo sysctl -w vm.drop_caches=3
}

func runStrict(wd string, cmd []string) {
	var err error
	if wd != "" {
		if err = os.Chdir(wd); err != nil {
			log.Info("cd", "wd", "failed", err)
			badExit(nil, err)
		}
	}
	log.Info(wd, "running:", wd, cmd)
	// result := shell.Run(cmd)
	result := shell.RunRealtime(cmd)
	if result.Error != nil {
		log.Info("cmd failed", wd, cmd, err)
		for i, line := range result.Stdout {
			log.Info("STDOUT:", i, line)
		}
		for i, line := range result.Stderr {
			log.Info("STDERR:", i, line)
		}
		badExit(nil, err)
	}
	if result.Exit != 0 {
		log.Info("cmd failed", wd, cmd, err)
		for i, line := range result.Stdout {
			log.Info("STDOUT:", i, line)
		}
		for i, line := range result.Stderr {
			log.Info("STDERR:", i, line)
		}
		badExit(nil, errors.New(fmt.Sprintf("cmd failed with %d", result.Exit)))
	}
	for i, line := range result.Stdout {
		log.Info(i, line)
	}
}