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git.go
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git.go
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package generators
import (
"context"
"fmt"
"path"
"sort"
"strconv"
"strings"
"time"
"github.com/jeremywohl/flatten"
log "github.com/sirupsen/logrus"
"sigs.k8s.io/yaml"
"github.com/argoproj/argo-cd/v2/applicationset/services"
argoprojiov1alpha1 "github.com/argoproj/argo-cd/v2/pkg/apis/applicationset/v1alpha1"
)
var _ Generator = (*GitGenerator)(nil)
type GitGenerator struct {
repos services.Repos
}
func NewGitGenerator(repos services.Repos) Generator {
g := &GitGenerator{
repos: repos,
}
return g
}
func (g *GitGenerator) GetTemplate(appSetGenerator *argoprojiov1alpha1.ApplicationSetGenerator) *argoprojiov1alpha1.ApplicationSetTemplate {
return &appSetGenerator.Git.Template
}
func (g *GitGenerator) GetRequeueAfter(appSetGenerator *argoprojiov1alpha1.ApplicationSetGenerator) time.Duration {
// Return a requeue default of 3 minutes, if no default is specified.
if appSetGenerator.Git.RequeueAfterSeconds != nil {
return time.Duration(*appSetGenerator.Git.RequeueAfterSeconds) * time.Second
}
return DefaultRequeueAfterSeconds
}
func (g *GitGenerator) GenerateParams(appSetGenerator *argoprojiov1alpha1.ApplicationSetGenerator, _ *argoprojiov1alpha1.ApplicationSet) ([]map[string]string, error) {
if appSetGenerator == nil {
return nil, EmptyAppSetGeneratorError
}
if appSetGenerator.Git == nil {
return nil, EmptyAppSetGeneratorError
}
var err error
var res []map[string]string
if appSetGenerator.Git.Directories != nil {
res, err = g.generateParamsForGitDirectories(appSetGenerator)
} else if appSetGenerator.Git.Files != nil {
res, err = g.generateParamsForGitFiles(appSetGenerator)
} else {
return nil, EmptyAppSetGeneratorError
}
if err != nil {
return nil, err
}
return res, nil
}
func (g *GitGenerator) generateParamsForGitDirectories(appSetGenerator *argoprojiov1alpha1.ApplicationSetGenerator) ([]map[string]string, error) {
// Directories, not files
allPaths, err := g.repos.GetDirectories(context.TODO(), appSetGenerator.Git.RepoURL, appSetGenerator.Git.Revision)
if err != nil {
return nil, err
}
log.WithFields(log.Fields{
"allPaths": allPaths,
"total": len(allPaths),
"repoURL": appSetGenerator.Git.RepoURL,
"revision": appSetGenerator.Git.Revision,
}).Info("applications result from the repo service")
requestedApps := g.filterApps(appSetGenerator.Git.Directories, allPaths)
res := g.generateParamsFromApps(requestedApps, appSetGenerator)
return res, nil
}
func (g *GitGenerator) generateParamsForGitFiles(appSetGenerator *argoprojiov1alpha1.ApplicationSetGenerator) ([]map[string]string, error) {
// Get all files that match the requested path string, removing duplicates
allFiles := make(map[string][]byte)
for _, requestedPath := range appSetGenerator.Git.Files {
files, err := g.repos.GetFiles(context.TODO(), appSetGenerator.Git.RepoURL, appSetGenerator.Git.Revision, requestedPath.Path)
if err != nil {
return nil, err
}
for filePath, content := range files {
allFiles[filePath] = content
}
}
// Extract the unduplicated map into a list, and sort by path to ensure a deterministic
// processing order in the subsequent step
allPaths := []string{}
for path := range allFiles {
allPaths = append(allPaths, path)
}
sort.Strings(allPaths)
// Generate params from each path, and return
res := []map[string]string{}
for _, path := range allPaths {
// A JSON / YAML file path can contain multiple sets of parameters (ie it is an array)
paramsArray, err := g.generateParamsFromGitFile(path, allFiles[path])
if err != nil {
return nil, fmt.Errorf("unable to process file '%s': %v", path, err)
}
for index := range paramsArray {
res = append(res, paramsArray[index])
}
}
return res, nil
}
func (g *GitGenerator) generateParamsFromGitFile(filePath string, fileContent []byte) ([]map[string]string, error) {
objectsFound := []map[string]interface{}{}
// First, we attempt to parse as an array
err := yaml.Unmarshal(fileContent, &objectsFound)
if err != nil {
// If unable to parse as an array, attempt to parse as a single object
singleObj := make(map[string]interface{})
err = yaml.Unmarshal(fileContent, &singleObj)
if err != nil {
return nil, fmt.Errorf("unable to parse file: %v", err)
}
objectsFound = append(objectsFound, singleObj)
}
res := []map[string]string{}
// Flatten all objects found, and return them
for _, objectFound := range objectsFound {
flat, err := flatten.Flatten(objectFound, "", flatten.DotStyle)
if err != nil {
return nil, err
}
params := map[string]string{}
for k, v := range flat {
params[k] = fmt.Sprintf("%v", v)
}
params["path"] = path.Dir(filePath)
params["path.basename"] = path.Base(params["path"])
params["path.filename"] = path.Base(filePath)
params["path.basenameNormalized"] = sanitizeName(path.Base(params["path"]))
params["path.filenameNormalized"] = sanitizeName(path.Base(params["path.filename"]))
for k, v := range strings.Split(params["path"], "/") {
if len(v) > 0 {
params["path["+strconv.Itoa(k)+"]"] = v
}
}
res = append(res, params)
}
return res, nil
}
func (g *GitGenerator) filterApps(Directories []argoprojiov1alpha1.GitDirectoryGeneratorItem, allPaths []string) []string {
res := []string{}
for _, appPath := range allPaths {
appInclude := false
appExclude := false
// Iterating over each appPath and check whether directories object has requestedPath that matches the appPath
for _, requestedPath := range Directories {
match, err := path.Match(requestedPath.Path, appPath)
if err != nil {
log.WithError(err).WithField("requestedPath", requestedPath).
WithField("appPath", appPath).Error("error while matching appPath to requestedPath")
continue
}
if match && !requestedPath.Exclude {
appInclude = true
}
if match && requestedPath.Exclude {
appExclude = true
}
}
// Whenever there is a path with exclude: true it wont be included, even if it is included in a different path pattern
if appInclude && !appExclude {
res = append(res, appPath)
}
}
return res
}
func (g *GitGenerator) generateParamsFromApps(requestedApps []string, _ *argoprojiov1alpha1.ApplicationSetGenerator) []map[string]string {
// TODO: At some point, the appicationSetGenerator param should be used
res := make([]map[string]string, len(requestedApps))
for i, a := range requestedApps {
params := make(map[string]string, 2)
params["path"] = a
params["path.basename"] = path.Base(a)
params["path.basenameNormalized"] = sanitizeName(path.Base(a))
for k, v := range strings.Split(params["path"], "/") {
if len(v) > 0 {
params["path["+strconv.Itoa(k)+"]"] = v
}
}
res[i] = params
}
return res
}