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// Copyright (c) 2020 Cisco and/or its affiliates.
//
// 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 vppapi
import (
"fmt"
"io/ioutil"
"os"
"os/exec"
"path"
"strings"
"github.com/sirupsen/logrus"
)
const (
VPPVersionEnvVar = "VPP_VERSION"
VPPDirEnvVar = "VPP_DIR"
versionScriptPath = "./src/scripts/version"
)
// ResolveVPPVersion resolves version of the VPP for target directory.
//
// Version resolved here can be overriden by setting VPP_VERSION env var.
func ResolveVPPVersion(apidir string) string {
// check env variable override
if ver := os.Getenv(VPPVersionEnvVar); ver != "" {
logrus.Infof("VPP version was manually set to %q via %s env var", ver, VPPVersionEnvVar)
return ver
}
// assuming VPP package is installed
if _, err := exec.LookPath("vpp"); err == nil {
version, err := GetVPPVersionInstalled()
if err != nil {
logrus.Warnf("resolving VPP version from installed package failed: %v", err)
} else {
logrus.Infof("resolved VPP version from installed package: %v", version)
return version
}
}
// check if inside VPP repo
repoDir, err := findGitRepoRootDir(apidir)
if err != nil {
logrus.Warnf("checking VPP git repo failed: %v", err)
} else {
logrus.Debugf("resolved git repo root directory: %v", repoDir)
version, err := GetVPPVersionRepo(repoDir)
if err != nil {
logrus.Warnf("resolving VPP version from version script failed: %v", err)
} else {
logrus.Infof("resolved VPP version from version script: %v", version)
return version
}
}
// try to read VPP_VERSION file
data, err := ioutil.ReadFile(path.Join(repoDir, "VPP_VERSION"))
if err == nil {
return strings.TrimSpace(string(data))
}
logrus.Warnf("VPP version could not be resolved, you can set it manually using %s env var", VPPVersionEnvVar)
return ""
}
// GetVPPVersionInstalled retrieves VPP version of installed package using dpkg-query.
func GetVPPVersionInstalled() (string, error) {
cmd := exec.Command("dpkg-query", "-f", "${Version}", "-W", "vpp")
out, err := cmd.CombinedOutput()
if err != nil {
return "", fmt.Errorf("dpkg-query command failed: %v\noutput: %s", err, out)
}
return strings.TrimSpace(string(out)), nil
}
// GetVPPVersionRepo retrieves VPP version using script in repo directory.
func GetVPPVersionRepo(repoDir string) (string, error) {
scriptPath := path.Join(repoDir, versionScriptPath)
if _, err := os.Stat(scriptPath); err != nil {
return "", err
}
cmd := exec.Command(scriptPath)
cmd.Dir = repoDir
out, err := cmd.CombinedOutput()
if err != nil {
return "", fmt.Errorf("version script failed: %v\noutput: %s", err, out)
}
return strings.TrimSpace(string(out)), nil
}
func findGitRepoRootDir(dir string) (string, error) {
if conf := os.Getenv(VPPDirEnvVar); conf != "" {
logrus.Infof("VPP directory was manually set to %q via %s env var", conf, VPPDirEnvVar)
return conf, nil
}
cmd := exec.Command("git", "rev-parse", "--show-toplevel")
cmd.Dir = dir
out, err := cmd.CombinedOutput()
if err != nil {
return "", fmt.Errorf("git command failed: %v\noutput: %s", err, out)
}
return strings.TrimSpace(string(out)), nil
}
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