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// Copyright 2015 Canonical Ltd.
// Copyright 2015 Cloudbase Solutions SRL
// Licensed under the LGPLv3, see LICENCE file for details.
package manager
import (
"bytes"
"fmt"
"os/exec"
"regexp"
"strings"
"github.com/juju/errors"
"github.com/juju/utils/proxy"
)
// proxyRe is a regexp which matches all proxy-related configuration options in
// the apt configuration file.
var proxyRE = regexp.MustCompile(`(?im)^\s*Acquire::(?P<protocol>[a-z]+)::Proxy\s+"(?P<proxy>[^"]+)";\s*$`)
// apt is the PackageManager implementation for deb-based systems.
type apt struct {
basePackageManager
}
// Search is defined on the PackageManager interface.
func (apt *apt) Search(pack string) (bool, error) {
out, _, err := RunCommandWithRetry(apt.cmder.SearchCmd(pack), nil)
if err != nil {
return false, err
}
// apt-cache search --names-only package returns no output
// if the search was unsuccesful
if out == "" {
return false, nil
}
return true, nil
}
// Install is defined on the PackageManager interface.
func (apt *apt) Install(packs ...string) error {
fatalErr := func(output string) error {
// If we couldn't find the package don't retry.
// apt-get will report "Unable to locate package"
if strings.Contains(output, "Unable to locate package") {
return errors.New("unable to locate package")
}
return nil
}
_, _, err := RunCommandWithRetry(apt.cmder.InstallCmd(packs...), fatalErr)
return err
}
// GetProxySettings is defined on the PackageManager interface.
func (apt *apt) GetProxySettings() (proxy.Settings, error) {
var res proxy.Settings
args := strings.Fields(apt.cmder.GetProxyCmd())
if len(args) <= 1 {
return proxy.Settings{}, fmt.Errorf("expected at least 2 arguments, got %d %v", len(args), args)
}
cmd := exec.Command(args[0], args[1:]...)
out, err := CommandOutput(cmd)
if err != nil {
logger.Errorf("command failed: %v\nargs: %#v\n%s",
err, args, string(out))
return res, fmt.Errorf("command failed: %v", err)
}
output := string(bytes.Join(proxyRE.FindAll(out, -1), []byte("\n")))
for _, match := range proxyRE.FindAllStringSubmatch(output, -1) {
switch match[1] {
case "http":
res.Http = match[2]
case "https":
res.Https = match[2]
case "ftp":
res.Ftp = match[2]
}
}
return res, nil
}
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