woodpecker/pipeline/frontend/yaml/constraint/constraint.go
2023-04-08 13:15:28 +02:00

390 lines
9 KiB
Go

package constraint
import (
"errors"
"fmt"
"strings"
"github.com/antonmedv/expr"
"github.com/bmatcuk/doublestar/v4"
"gopkg.in/yaml.v3"
"github.com/woodpecker-ci/woodpecker/pipeline/frontend"
"github.com/woodpecker-ci/woodpecker/pipeline/frontend/yaml/types"
)
type (
// When defines a set of runtime constraints.
When struct {
// If true then read from a list of constraint
Constraints []Constraint
}
Constraint struct {
Ref List
Repo List
Instance List
Platform List
Environment List
Event List
Branch List
Cron List
Status List
Matrix Map
Local types.BoolTrue
Path Path
Evaluate string `yaml:"evaluate,omitempty"`
}
// List defines a runtime constraint for exclude & include string slices.
List struct {
Include []string
Exclude []string
}
// Map defines a runtime constraint for exclude & include map strings.
Map struct {
Include map[string]string
Exclude map[string]string
}
// Path defines a runtime constrain for exclude & include paths.
Path struct {
Include []string
Exclude []string
IgnoreMessage string `yaml:"ignore_message,omitempty"`
}
)
func (when *When) IsEmpty() bool {
return len(when.Constraints) == 0
}
// Returns true if at least one of the internal constraints is true.
func (when *When) Match(metadata frontend.Metadata, global bool) (bool, error) {
for _, c := range when.Constraints {
match, err := c.Match(metadata, global)
if err != nil {
return false, err
}
if match {
return true, nil
}
}
if when.IsEmpty() {
// test against default Constraints
empty := &Constraint{}
return empty.Match(metadata, global)
}
return false, nil
}
func (when *When) IncludesStatusFailure() bool {
for _, c := range when.Constraints {
if c.Status.Includes("failure") {
return true
}
}
return false
}
func (when *When) IncludesStatusSuccess() bool {
// "success" acts differently than "failure" in that it's
// presumed to be included unless it's specifically not part
// of the list
if when.IsEmpty() {
return true
}
for _, c := range when.Constraints {
if len(c.Status.Include) == 0 || c.Status.Includes("success") {
return true
}
}
return false
}
// False if (any) non local
func (when *When) IsLocal() bool {
for _, c := range when.Constraints {
if !c.Local.Bool() {
return false
}
}
return true
}
func (when *When) UnmarshalYAML(value *yaml.Node) error {
switch value.Kind {
case yaml.SequenceNode:
if err := value.Decode(&when.Constraints); err != nil {
return err
}
case yaml.MappingNode:
c := Constraint{}
if err := value.Decode(&c); err != nil {
return err
}
when.Constraints = append(when.Constraints, c)
default:
return fmt.Errorf("not supported yaml kind: %v", value.Kind)
}
return nil
}
// Match returns true if all constraints match the given input. If a single
// constraint fails a false value is returned.
func (c *Constraint) Match(metadata frontend.Metadata, global bool) (bool, error) {
match := true
if !global {
c.SetDefaultEventFilter()
// apply step only filters
match = c.Matrix.Match(metadata.Workflow.Matrix)
}
match = match && c.Platform.Match(metadata.Sys.Platform) &&
c.Environment.Match(metadata.Curr.Target) &&
c.Event.Match(metadata.Curr.Event) &&
c.Repo.Match(metadata.Repo.Name) &&
c.Ref.Match(metadata.Curr.Commit.Ref) &&
c.Instance.Match(metadata.Sys.Host)
// changed files filter apply only for pull-request and push events
if metadata.Curr.Event == frontend.EventPull || metadata.Curr.Event == frontend.EventPush {
match = match && c.Path.Match(metadata.Curr.Commit.ChangedFiles, metadata.Curr.Commit.Message)
}
if metadata.Curr.Event != frontend.EventTag {
match = match && c.Branch.Match(metadata.Curr.Commit.Branch)
}
if metadata.Curr.Event == frontend.EventCron {
match = match && c.Cron.Match(metadata.Curr.Cron)
}
if c.Evaluate != "" {
env := metadata.Environ()
out, err := expr.Compile(c.Evaluate, expr.Env(env), expr.AsBool())
if err != nil {
return false, err
}
result, err := expr.Run(out, env)
if err != nil {
return false, err
}
match = match && result.(bool)
}
return match, nil
}
// SetDefaultEventFilter set default e event filter if not event filter is already set
func (c *Constraint) SetDefaultEventFilter() {
if c.Event.IsEmpty() {
c.Event.Include = []string{
frontend.EventPush,
frontend.EventPull,
frontend.EventTag,
frontend.EventDeploy,
frontend.EventManual,
}
}
}
// IsEmpty return true if a constraint has no conditions
func (c List) IsEmpty() bool {
return len(c.Include) == 0 && len(c.Exclude) == 0
}
// Match returns true if the string matches the include patterns and does not
// match any of the exclude patterns.
func (c *List) Match(v string) bool {
if c.Excludes(v) {
return false
}
if c.Includes(v) {
return true
}
if len(c.Include) == 0 {
return true
}
return false
}
// Includes returns true if the string matches the include patterns.
func (c *List) Includes(v string) bool {
for _, pattern := range c.Include {
if ok, _ := doublestar.Match(pattern, v); ok {
return true
}
}
return false
}
// Excludes returns true if the string matches the exclude patterns.
func (c *List) Excludes(v string) bool {
for _, pattern := range c.Exclude {
if ok, _ := doublestar.Match(pattern, v); ok {
return true
}
}
return false
}
// UnmarshalYAML unmarshals the constraint.
func (c *List) UnmarshalYAML(value *yaml.Node) error {
out1 := struct {
Include types.StringOrSlice
Exclude types.StringOrSlice
}{}
var out2 types.StringOrSlice
err1 := value.Decode(&out1)
err2 := value.Decode(&out2)
c.Exclude = out1.Exclude
c.Include = append(
out1.Include,
out2...,
)
if err1 != nil && err2 != nil {
y, _ := yaml.Marshal(value)
return fmt.Errorf("Could not parse condition: %s: %w", y, errors.Join(err1, err2))
}
return nil
}
// Match returns true if the params matches the include key values and does not
// match any of the exclude key values.
func (c *Map) Match(params map[string]string) bool {
// when no includes or excludes automatically match
if len(c.Include) == 0 && len(c.Exclude) == 0 {
return true
}
// exclusions are processed first. So we can include everything and then
// selectively include others.
if len(c.Exclude) != 0 {
var matches int
for key, val := range c.Exclude {
if ok, _ := doublestar.Match(val, params[key]); ok {
matches++
}
}
if matches == len(c.Exclude) {
return false
}
}
for key, val := range c.Include {
if ok, _ := doublestar.Match(val, params[key]); !ok {
return false
}
}
return true
}
// UnmarshalYAML unmarshal the constraint map.
func (c *Map) UnmarshalYAML(unmarshal func(interface{}) error) error {
out1 := struct {
Include map[string]string
Exclude map[string]string
}{
Include: map[string]string{},
Exclude: map[string]string{},
}
out2 := map[string]string{}
_ = unmarshal(&out1) // it contains include and exclude statement
_ = unmarshal(&out2) // it contains no include/exclude statement, assume include as default
c.Include = out1.Include
c.Exclude = out1.Exclude
for k, v := range out2 {
c.Include[k] = v
}
return nil
}
// UnmarshalYAML unmarshal the constraint.
func (c *Path) UnmarshalYAML(value *yaml.Node) error {
out1 := struct {
Include types.StringOrSlice `yaml:"include,omitempty"`
Exclude types.StringOrSlice `yaml:"exclude,omitempty"`
IgnoreMessage string `yaml:"ignore_message,omitempty"`
}{}
var out2 types.StringOrSlice
err1 := value.Decode(&out1)
err2 := value.Decode(&out2)
c.Exclude = out1.Exclude
c.IgnoreMessage = out1.IgnoreMessage
c.Include = append(
out1.Include,
out2...,
)
if err1 != nil && err2 != nil {
y, _ := yaml.Marshal(value)
return fmt.Errorf("Could not parse condition: %s", y)
}
return nil
}
// Match returns true if file paths in string slice matches the include and not exclude patterns
// or if commit message contains ignore message.
func (c *Path) Match(v []string, message string) bool {
// ignore file pattern matches if the commit message contains a pattern
if len(c.IgnoreMessage) > 0 && strings.Contains(strings.ToLower(message), strings.ToLower(c.IgnoreMessage)) {
return true
}
// always match if there are no commit files (empty commit)
if len(v) == 0 {
return true
}
if len(c.Exclude) > 0 && c.Excludes(v) {
return false
}
if len(c.Include) > 0 && !c.Includes(v) {
return false
}
return true
}
// Includes returns true if the string matches any of the include patterns.
func (c *Path) Includes(v []string) bool {
for _, pattern := range c.Include {
for _, file := range v {
if ok, _ := doublestar.Match(pattern, file); ok {
return true
}
}
}
return false
}
// Excludes returns true if the string matches any of the exclude patterns.
func (c *Path) Excludes(v []string) bool {
for _, pattern := range c.Exclude {
for _, file := range v {
if ok, _ := doublestar.Match(pattern, file); ok {
return true
}
}
}
return false
}