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config.go
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config.go
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package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"os"
"path"
"path/filepath"
"github.com/alecthomas/kong"
"github.com/willabides/bindownloader"
)
var configKongVars = kong.Vars{
"config_format_help": `formats the config file`,
"config_checksums_help": `update checksums in the config file`,
"config_checksums_bin_help": `name of the binary to update`,
"config_validate_bin_help": `name of the binary to validate`,
"config_validate_help": `validate that downloads work`,
}
type configCmd struct {
Format configFmtCmd `kong:"cmd,help=${config_format_help}"`
UpdateChecksums configUpdateChecksumsCmd `kong:"cmd,help=${config_checksums_bin_help}"`
Validate configValidateCmd `kong:"cmd,help=${config_validate_help}"`
}
type configFmtCmd struct{}
func (c configFmtCmd) Run() error {
config, err := bindownloader.LoadConfigFile(cli.Configfile)
if err != nil {
return err
}
b, err := json.MarshalIndent(&config, "", " ")
if err != nil {
return err
}
return ioutil.WriteFile(cli.Configfile, b, 0600)
}
type configUpdateChecksumsCmd struct {
TargetFile string `kong:"required=true,arg,help=${config_checksums_bin_help}"`
}
func (d *configUpdateChecksumsCmd) Run(*kong.Context) error {
config, err := bindownloader.LoadConfigFile(cli.Configfile)
if err != nil {
return fmt.Errorf("error loading config from %q", cli.Configfile)
}
binary := path.Base(d.TargetFile)
binDir := path.Dir(d.TargetFile)
downloaders, ok := config.Downloaders[binary]
if !ok {
return fmt.Errorf("nothing configured for %q", binary)
}
for _, downloader := range downloaders {
err = downloader.UpdateChecksum(bindownloader.UpdateChecksumOpts{
DownloaderName: binary,
CellarDir: cli.CellarDir,
TargetDir: binDir,
})
if err != nil {
return err
}
}
b, err := json.MarshalIndent(&config, "", " ")
if err != nil {
return err
}
return ioutil.WriteFile(cli.Configfile, b, 0600)
}
type configValidateCmd struct {
Bin string `kong:"required=true,arg,help=${config_validate_bin_help}"`
}
func (d configValidateCmd) Run(kctx *kong.Context) error {
config, err := bindownloader.LoadConfigFile(cli.Configfile)
if err != nil {
return fmt.Errorf("error loading config from %q", cli.Configfile)
}
tmpDir, err := ioutil.TempDir("", "bindownloader")
if err != nil {
return err
}
defer func() {
err = os.RemoveAll(tmpDir)
if err != nil {
kctx.Errorf("error deleting temp directory, %q", tmpDir)
}
}()
binary := path.Base(d.Bin)
binDir := filepath.Join(tmpDir, "bin")
err = os.MkdirAll(binDir, 0700)
if err != nil {
return err
}
cellarDir := cli.CellarDir
if cellarDir == "" {
cellarDir = filepath.Join(tmpDir, "cellar")
}
downloaders, ok := config.Downloaders[binary]
if !ok {
return fmt.Errorf("nothing configured for %q", binary)
}
for _, downloader := range downloaders {
dlJSON, err := json.MarshalIndent(downloader, "", " ")
if err != nil {
return err
}
installOpts := bindownloader.InstallOpts{
DownloaderName: binary,
TargetDir: binDir,
Force: true,
CellarDir: cellarDir,
}
err = downloader.Install(installOpts)
if err != nil {
return fmt.Errorf("could not validate downloader:\n%s", string(dlJSON))
}
err = os.Remove(filepath.Join(binDir, downloader.BinName))
if err != nil {
return err
}
}
return nil
}