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feat: implement expression evaluator
Co-authored-by: Markus Wolf <[email protected]> Co-authored-by: Philipp Hinrichsen <[email protected]>
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Dec 22, 2021
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,282 @@ | ||
| package exprparser | ||
|
|
||
| import ( | ||
| "crypto/sha256" | ||
| "encoding/hex" | ||
| "encoding/json" | ||
| "fmt" | ||
| "io" | ||
| "os" | ||
| "path/filepath" | ||
| "reflect" | ||
| "strconv" | ||
| "strings" | ||
|
|
||
| "github.com/nektos/act/pkg/model" | ||
| ) | ||
|
|
||
| func (impl *interperterImpl) contains(search, item reflect.Value) (bool, error) { | ||
| switch search.Kind() { | ||
| case reflect.String, reflect.Int, reflect.Float64, reflect.Bool, reflect.Invalid: | ||
| return strings.Contains( | ||
| strings.ToLower(impl.coerceToString(search).String()), | ||
| strings.ToLower(impl.coerceToString(item).String()), | ||
| ), nil | ||
|
|
||
| case reflect.Slice: | ||
| switch item.Kind() { | ||
| case reflect.String, reflect.Int, reflect.Float64, reflect.Bool, reflect.Invalid: | ||
| itemStr := strings.ToLower(impl.coerceToString(item).String()) | ||
|
|
||
| for i := 0; i < search.Len(); i++ { | ||
| if strings.ToLower(impl.coerceToString(search.Index(i).Elem()).String()) == itemStr { | ||
| return true, nil | ||
| } | ||
| } | ||
|
|
||
| case reflect.Slice, reflect.Struct: | ||
| for i := 0; i < search.Len(); i++ { | ||
| if search.Index(i).Elem() == item { | ||
| return true, nil | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| return false, nil | ||
| } | ||
|
|
||
| func (impl *interperterImpl) startsWith(searchString, searchValue reflect.Value) (bool, error) { | ||
| return strings.HasPrefix( | ||
| strings.ToLower(impl.coerceToString(searchString).String()), | ||
| strings.ToLower(impl.coerceToString(searchValue).String()), | ||
| ), nil | ||
| } | ||
|
|
||
| func (impl *interperterImpl) endsWith(searchString, searchValue reflect.Value) (bool, error) { | ||
| return strings.HasSuffix( | ||
| strings.ToLower(impl.coerceToString(searchString).String()), | ||
| strings.ToLower(impl.coerceToString(searchValue).String()), | ||
| ), nil | ||
| } | ||
|
|
||
| const ( | ||
| passThrough = iota | ||
| bracketOpen | ||
| bracketClose | ||
| ) | ||
|
|
||
| func (impl *interperterImpl) format(str reflect.Value, replaceValue ...reflect.Value) (string, error) { | ||
| input := impl.coerceToString(str).String() | ||
| output := "" | ||
| replacementIndex := "" | ||
|
|
||
| state := passThrough | ||
| for _, character := range input { | ||
| switch state { | ||
| case passThrough: // normal buffer output | ||
| switch character { | ||
| case '{': | ||
| state = bracketOpen | ||
|
|
||
| case '}': | ||
| state = bracketClose | ||
|
|
||
| default: | ||
| output += string(character) | ||
| } | ||
|
|
||
| case bracketOpen: // found { | ||
| switch character { | ||
| case '{': | ||
| output += "{" | ||
| replacementIndex = "" | ||
| state = passThrough | ||
|
|
||
| case '}': | ||
| index, err := strconv.ParseInt(replacementIndex, 10, 32) | ||
| if err != nil { | ||
| return "", fmt.Errorf("The following format string is invalid: '%s'", input) | ||
| } | ||
|
|
||
| replacementIndex = "" | ||
|
|
||
| if len(replaceValue) <= int(index) { | ||
| return "", fmt.Errorf("The following format string references more arguments than were supplied: '%s'", input) | ||
| } | ||
|
|
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| output += impl.coerceToString(replaceValue[index]).String() | ||
|
|
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| state = passThrough | ||
|
|
||
| default: | ||
| replacementIndex += string(character) | ||
| } | ||
|
|
||
| case bracketClose: // found } | ||
| switch character { | ||
| case '}': | ||
| output += "}" | ||
| replacementIndex = "" | ||
| state = passThrough | ||
|
|
||
| default: | ||
| panic("Invalid format parser state") | ||
| } | ||
| } | ||
| } | ||
|
|
||
| if state != passThrough { | ||
| switch state { | ||
| case bracketOpen: | ||
| return "", fmt.Errorf("Unclosed brackets. The following format string is invalid: '%s'", input) | ||
|
|
||
| case bracketClose: | ||
| return "", fmt.Errorf("Closing bracket without opening one. The following format string is invalid: '%s'", input) | ||
| } | ||
| } | ||
|
|
||
| return output, nil | ||
| } | ||
|
|
||
| func (impl *interperterImpl) join(array reflect.Value, sep reflect.Value) (string, error) { | ||
| separator := impl.coerceToString(sep).String() | ||
| switch array.Kind() { | ||
| case reflect.Slice: | ||
| var items []string | ||
| for i := 0; i < array.Len(); i++ { | ||
| items = append(items, impl.coerceToString(array.Index(i).Elem()).String()) | ||
| } | ||
|
|
||
| return strings.Join(items, separator), nil | ||
| default: | ||
| return strings.Join([]string{impl.coerceToString(array).String()}, separator), nil | ||
| } | ||
| } | ||
|
|
||
| func (impl *interperterImpl) toJSON(value reflect.Value) (string, error) { | ||
| if value.Kind() == reflect.Invalid { | ||
| return "", nil | ||
| } | ||
|
|
||
| json, err := json.MarshalIndent(value.Interface(), "", " ") | ||
| if err != nil { | ||
| return "", fmt.Errorf("Cannot convert value to JSON. Cause: %v", err) | ||
| } | ||
|
|
||
| return string(json), nil | ||
| } | ||
|
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| func (impl *interperterImpl) fromJSON(value reflect.Value) (interface{}, error) { | ||
| if value.Kind() != reflect.String { | ||
| return nil, fmt.Errorf("Cannot parse non-string type %v as JSON", value.Kind()) | ||
| } | ||
|
|
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| var data interface{} | ||
|
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| err := json.Unmarshal([]byte(value.String()), &data) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("Invalid JSON: %v", err) | ||
| } | ||
|
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||
| return data, nil | ||
| } | ||
|
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| func (impl *interperterImpl) hashFiles(paths ...reflect.Value) (string, error) { | ||
| var filepaths []string | ||
|
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| for _, path := range paths { | ||
| if path.Kind() == reflect.String { | ||
| filepaths = append(filepaths, path.String()) | ||
| } else { | ||
| return "", fmt.Errorf("Non-string path passed to hashFiles") | ||
| } | ||
| } | ||
|
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| var files []string | ||
|
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| for i := range filepaths { | ||
| newFiles, err := filepath.Glob(filepath.Join(impl.config.WorkingDir, filepaths[i])) | ||
| if err != nil { | ||
| return "", fmt.Errorf("Unable to glob.Glob: %v", err) | ||
| } | ||
|
|
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| files = append(files, newFiles...) | ||
| } | ||
|
|
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| if len(files) == 0 { | ||
| return "", nil | ||
| } | ||
|
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| hasher := sha256.New() | ||
|
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| for _, file := range files { | ||
| f, err := os.Open(file) | ||
| if err != nil { | ||
| return "", fmt.Errorf("Unable to os.Open: %v", err) | ||
| } | ||
|
|
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| if _, err := io.Copy(hasher, f); err != nil { | ||
| return "", fmt.Errorf("Unable to io.Copy: %v", err) | ||
| } | ||
|
|
||
| if err := f.Close(); err != nil { | ||
| return "", fmt.Errorf("Unable to Close file: %v", err) | ||
| } | ||
| } | ||
|
|
||
| return hex.EncodeToString(hasher.Sum(nil)), nil | ||
| } | ||
|
|
||
| func (impl *interperterImpl) getNeedsTransitive(job *model.Job) []string { | ||
| needs := job.Needs() | ||
|
|
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| for _, need := range needs { | ||
| parentNeeds := impl.getNeedsTransitive(impl.config.Run.Workflow.GetJob(need)) | ||
| needs = append(needs, parentNeeds...) | ||
| } | ||
|
|
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| return needs | ||
| } | ||
|
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| func (impl *interperterImpl) always() (bool, error) { | ||
| return true, nil | ||
| } | ||
|
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| func (impl *interperterImpl) jobSuccess() (bool, error) { | ||
| jobs := impl.config.Run.Workflow.Jobs | ||
| jobNeeds := impl.getNeedsTransitive(impl.config.Run.Job()) | ||
|
|
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| for _, needs := range jobNeeds { | ||
| if jobs[needs].Result != "success" { | ||
| return false, nil | ||
| } | ||
| } | ||
|
|
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| return true, nil | ||
| } | ||
|
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| func (impl *interperterImpl) stepSuccess() (bool, error) { | ||
| return impl.env.Job.Status == "success", nil | ||
| } | ||
|
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| func (impl *interperterImpl) jobFailure() (bool, error) { | ||
| jobs := impl.config.Run.Workflow.Jobs | ||
| jobNeeds := impl.getNeedsTransitive(impl.config.Run.Job()) | ||
|
|
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| for _, needs := range jobNeeds { | ||
| if jobs[needs].Result == "failure" { | ||
| return true, nil | ||
| } | ||
| } | ||
|
|
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| return false, nil | ||
| } | ||
|
|
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| func (impl *interperterImpl) stepFailure() (bool, error) { | ||
| return impl.env.Job.Status == "failure", nil | ||
| } | ||
|
|
||
| func (impl *interperterImpl) cancelled() (bool, error) { | ||
| return impl.env.Job.Status == "cancelled", nil | ||
| } |
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