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Copy pathhelm.go
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176 lines (154 loc) · 4.45 KB
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package helm
import (
"fmt"
"io/ioutil"
"net/url"
"os"
"os/exec"
"path"
"strings"
"github.com/ghodss/yaml"
"github.com/argoproj/argo-cd/v2/util/config"
executil "github.com/argoproj/argo-cd/v2/util/exec"
)
type HelmRepository struct {
Creds
Name string
Repo string
EnableOci bool
}
// Helm provides wrapper functionality around the `helm` command.
type Helm interface {
// Template returns a list of unstructured objects from a `helm template` command
Template(opts *TemplateOpts) (string, error)
// GetParameters returns a list of chart parameters taking into account values in provided YAML files.
GetParameters(valuesFiles []string) (map[string]string, error)
// DependencyBuild runs `helm dependency build` to download a chart's dependencies
DependencyBuild() error
// Init runs `helm init --client-only`
Init() error
// Dispose deletes temp resources
Dispose()
}
// NewHelmApp create a new wrapper to run commands on the `helm` command-line tool.
func NewHelmApp(workDir string, repos []HelmRepository, isLocal bool, version string) (Helm, error) {
cmd, err := NewCmd(workDir, version)
if err != nil {
return nil, err
}
cmd.IsLocal = isLocal
return &helm{repos: repos, cmd: *cmd}, nil
}
type helm struct {
cmd Cmd
repos []HelmRepository
}
// IsMissingDependencyErr tests if the error is related to a missing chart dependency
func IsMissingDependencyErr(err error) bool {
return strings.Contains(err.Error(), "found in requirements.yaml, but missing in charts") ||
strings.Contains(err.Error(), "found in Chart.yaml, but missing in charts/ directory")
}
func (h *helm) Template(templateOpts *TemplateOpts) (string, error) {
out, err := h.cmd.template(".", templateOpts)
if err != nil {
return "", err
}
return out, nil
}
func (h *helm) DependencyBuild() error {
isHelmOci := h.cmd.IsHelmOci
defer func() {
h.cmd.IsHelmOci = isHelmOci
}()
for i := range h.repos {
repo := h.repos[i]
if repo.EnableOci {
h.cmd.IsHelmOci = true
_, err := h.cmd.Login(repo.Repo, repo.Creds)
defer func() {
_, _ = h.cmd.Logout(repo.Repo, repo.Creds)
}()
if err != nil {
return err
}
} else {
_, err := h.cmd.RepoAdd(repo.Name, repo.Repo, repo.Creds)
if err != nil {
return err
}
}
}
h.repos = nil
_, err := h.cmd.dependencyBuild()
return err
}
func (h *helm) Init() error {
_, err := h.cmd.Init()
return err
}
func (h *helm) Dispose() {
h.cmd.Close()
}
func Version(shortForm bool) (string, error) {
executable := "helm"
cmdArgs := []string{"version", "--client"}
if shortForm {
cmdArgs = append(cmdArgs, "--short")
}
cmd := exec.Command(executable, cmdArgs...)
// example version output:
// long: "version.BuildInfo{Version:\"v3.3.1\", GitCommit:\"249e5215cde0c3fa72e27eb7a30e8d55c9696144\", GitTreeState:\"clean\", GoVersion:\"go1.14.7\"}"
// short: "v3.3.1+g249e521"
version, err := executil.RunWithRedactor(cmd, redactor)
if err != nil {
return "", fmt.Errorf("could not get helm version: %s", err)
}
return strings.TrimSpace(version), nil
}
func (h *helm) GetParameters(valuesFiles []string) (map[string]string, error) {
out, err := h.cmd.inspectValues(".")
if err != nil {
return nil, err
}
values := []string{out}
for _, file := range valuesFiles {
var fileValues []byte
parsedURL, err := url.ParseRequestURI(file)
if err == nil && (parsedURL.Scheme == "http" || parsedURL.Scheme == "https") {
fileValues, err = config.ReadRemoteFile(file)
} else {
filePath := path.Join(h.cmd.WorkDir, file)
if _, err := os.Stat(filePath); os.IsNotExist(err) {
continue
}
fileValues, err = ioutil.ReadFile(filePath)
}
if err != nil {
return nil, fmt.Errorf("failed to read value file %s: %s", file, err)
}
values = append(values, string(fileValues))
}
output := map[string]string{}
for _, file := range values {
values := map[string]interface{}{}
if err = yaml.Unmarshal([]byte(file), &values); err != nil {
return nil, fmt.Errorf("failed to parse values: %s", err)
}
flatVals(values, output)
}
return output, nil
}
func flatVals(input interface{}, output map[string]string, prefixes ...string) {
switch i := input.(type) {
case map[string]interface{}:
for k, v := range i {
flatVals(v, output, append(prefixes, k)...)
}
case []interface{}:
for j, v := range i {
flatVals(v, output, append(prefixes[0:len(prefixes)-1], fmt.Sprintf("%s[%v]", prefixes[len(prefixes)-1], j))...)
}
default:
output[strings.Join(prefixes, ".")] = fmt.Sprintf("%v", i)
}
}