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config.go
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config.go
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// Copyright 2017 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package swupd
import (
"errors"
"fmt"
"io/ioutil"
"path/filepath"
"strconv"
"strings"
"github.com/go-ini/ini"
)
type dbgConfig struct {
banned bool
lib string
src string
}
type config struct {
stateDir string
emptyDir string
imageBase string
outputDir string
debuginfo dbgConfig
}
var defaultConfig = config{
stateDir: "/var/lib/swupd",
emptyDir: "/var/lib/swupd/empty",
imageBase: "/var/lib/swupd/image",
outputDir: "/var/lib/swupd/www",
debuginfo: dbgConfig{
banned: true,
lib: "/usr/lib/debug",
src: "/usr/src/debug",
},
}
func getConfig(stateDir string) (config, error) {
var s string
if stateDir != "" {
s = stateDir
} else {
s = defaultConfig.stateDir
}
return readServerINI(s, filepath.Join(s, "server.ini"))
}
// readServerINI reads the server.ini file from path. Raises an error when the file
// exists but it was unable to be loaded
func readServerINI(stateDir, path string) (config, error) {
if !exists(path) {
// just use defaults
return defaultConfig, nil
}
userConfig := defaultConfig
userConfig.stateDir = stateDir
cfg, err := ini.InsensitiveLoad(path)
if err != nil {
// server.ini exists, but we were unable to read it
return defaultConfig, err
}
if key, err := cfg.Section("Server").GetKey("emptydir"); err == nil {
userConfig.emptyDir = key.Value()
}
if key, err := cfg.Section("Server").GetKey("imagebase"); err == nil {
userConfig.imageBase = key.Value()
}
if key, err := cfg.Section("Server").GetKey("outputdir"); err == nil {
userConfig.outputDir = key.Value()
}
if key, err := cfg.Section("Debuginfo").GetKey("banned"); err == nil {
userConfig.debuginfo.banned = (key.Value() == "true")
}
if key, err := cfg.Section("Debuginfo").GetKey("lib"); err == nil {
userConfig.debuginfo.lib = key.Value()
}
if key, err := cfg.Section("Debuginfo").GetKey("src"); err == nil {
userConfig.debuginfo.src = key.Value()
}
return userConfig, nil
}
// readGroupsINI reads the groups.ini file from path. Raises an error when the
// groups.ini file does not exist because it is required for the build
func readGroupsINI(path string) ([]string, error) {
if !exists(path) {
return nil, errors.New("no groups.ini file to define bundles")
}
cfg, err := ini.Load(path)
if err != nil {
return nil, err
}
sections := cfg.SectionStrings()
osCoreFound := false
groups := []string{}
for _, section := range sections {
if section == "DEFAULT" {
// skip "default" set by go-ini/ini
continue
}
// we don't appear to need the status key at the moment
groups = append(groups, section)
if !osCoreFound && section == "os-core" {
osCoreFound = true
}
}
if !osCoreFound {
err = errors.New("os-core bundle is not listed in groups.ini")
}
return groups, err
}
func readLastVerFile(path string) (uint32, error) {
if !exists(path) {
return 0, fmt.Errorf("unable to detect last version (%v file does not exist)", path)
}
lastVerOut, err := ioutil.ReadFile(path)
if err != nil {
return 0, err
}
lastVerString := strings.TrimSpace(string(lastVerOut))
parsed, err := strconv.ParseUint(lastVerString, 10, 32)
if err != nil {
return 0, err
}
return uint32(parsed), nil
}
func appendUnique(ss []string, s string) []string {
for _, e := range ss {
if e == s {
return ss
}
}
return append(ss, s)
}
func readIncludesFile(path string) ([]string, error) {
if !exists(path) {
return []string{}, nil
}
var allIncludes []byte
var err error
if allIncludes, err = ioutil.ReadFile(path); err != nil {
return []string{}, err
}
includes := []string{}
for _, s := range strings.Split(string(allIncludes), "\n") {
if s != "" {
includes = appendUnique(includes, s)
}
}
return includes, nil
}