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devs.go
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devs.go
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package leaves
import (
"errors"
"fmt"
"io"
"sort"
"strings"
"time"
"github.com/gogo/protobuf/proto"
"gopkg.in/src-d/go-git.v4"
"gopkg.in/src-d/go-git.v4/plumbing"
"gopkg.in/src-d/go-git.v4/plumbing/object"
"gopkg.in/src-d/hercules.v10/internal/core"
"gopkg.in/src-d/hercules.v10/internal/pb"
items "gopkg.in/src-d/hercules.v10/internal/plumbing"
"gopkg.in/src-d/hercules.v10/internal/plumbing/identity"
"gopkg.in/src-d/hercules.v10/internal/yaml"
)
// DevsAnalysis calculates the number of commits through time per developer.
// It also records the numbers of added, deleted and changed lines through time per developer.
// Those numbers are additionally measured per language.
type DevsAnalysis struct {
core.NoopMerger
core.OneShotMergeProcessor
// ConsiderEmptyCommits indicates whether empty commits (e.g., merges) should be taken
// into account.
ConsiderEmptyCommits bool
// ticks maps ticks to developers to stats
ticks map[int]map[int]*DevTick
// reversedPeopleDict references IdentityDetector.ReversedPeopleDict
reversedPeopleDict []string
// tickSize references TicksSinceStart.tickSize
tickSize time.Duration
l core.Logger
}
// DevsResult is returned by DevsAnalysis.Finalize() and carries the daily statistics
// per developer.
type DevsResult struct {
// Ticks is <tick index> -> <developer index> -> daily stats
Ticks map[int]map[int]*DevTick
// reversedPeopleDict references IdentityDetector.ReversedPeopleDict
reversedPeopleDict []string
// tickSize references TicksSinceStart.tickSize
tickSize time.Duration
}
// DevTick is the statistics for a development tick and a particular developer.
type DevTick struct {
// Commits is the number of commits made by a particular developer in a particular tick.
Commits int
items.LineStats
// LanguagesDetection carries fine-grained line stats per programming language.
Languages map[string]items.LineStats
}
const (
// ConfigDevsConsiderEmptyCommits is the name of the option to set DevsAnalysis.ConsiderEmptyCommits.
ConfigDevsConsiderEmptyCommits = "Devs.ConsiderEmptyCommits"
)
// Name of this PipelineItem. Uniquely identifies the type, used for mapping keys, etc.
func (devs *DevsAnalysis) Name() string {
return "Devs"
}
// Provides returns the list of names of entities which are produced by this PipelineItem.
// Each produced entity will be inserted into `deps` of dependent Consume()-s according
// to this list. Also used by core.Registry to build the global map of providers.
func (devs *DevsAnalysis) Provides() []string {
return []string{}
}
// Requires returns the list of names of entities which are needed by this PipelineItem.
// Each requested entity will be inserted into `deps` of Consume(). In turn, those
// entities are Provides() upstream.
func (devs *DevsAnalysis) Requires() []string {
return []string{
identity.DependencyAuthor, items.DependencyTreeChanges, items.DependencyTick,
items.DependencyLanguages, items.DependencyLineStats}
}
// ListConfigurationOptions returns the list of changeable public properties of this PipelineItem.
func (devs *DevsAnalysis) ListConfigurationOptions() []core.ConfigurationOption {
options := [...]core.ConfigurationOption{{
Name: ConfigDevsConsiderEmptyCommits,
Description: "Take into account empty commits such as trivial merges.",
Flag: "empty-commits",
Type: core.BoolConfigurationOption,
Default: false}}
return options[:]
}
// Configure sets the properties previously published by ListConfigurationOptions().
func (devs *DevsAnalysis) Configure(facts map[string]interface{}) error {
if l, exists := facts[core.ConfigLogger].(core.Logger); exists {
devs.l = l
}
if val, exists := facts[ConfigDevsConsiderEmptyCommits].(bool); exists {
devs.ConsiderEmptyCommits = val
}
if val, exists := facts[identity.FactIdentityDetectorReversedPeopleDict].([]string); exists {
devs.reversedPeopleDict = val
}
if val, exists := facts[items.FactTickSize].(time.Duration); exists {
devs.tickSize = val
}
return nil
}
// Flag for the command line switch which enables this analysis.
func (devs *DevsAnalysis) Flag() string {
return "devs"
}
// Description returns the text which explains what the analysis is doing.
func (devs *DevsAnalysis) Description() string {
return "Calculates the number of commits, added, removed and changed lines per developer through time."
}
// Initialize resets the temporary caches and prepares this PipelineItem for a series of Consume()
// calls. The repository which is going to be analysed is supplied as an argument.
func (devs *DevsAnalysis) Initialize(repository *git.Repository) error {
if devs.tickSize == 0 {
return errors.New("tick size must be specified")
}
devs.l = core.NewLogger()
devs.ticks = map[int]map[int]*DevTick{}
devs.OneShotMergeProcessor.Initialize()
return nil
}
// Consume runs this PipelineItem on the next commit data.
// `deps` contain all the results from upstream PipelineItem-s as requested by Requires().
// Additionally, DependencyCommit is always present there and represents the analysed *object.Commit.
// This function returns the mapping with analysis results. The keys must be the same as
// in Provides(). If there was an error, nil is returned.
func (devs *DevsAnalysis) Consume(deps map[string]interface{}) (map[string]interface{}, error) {
if !devs.ShouldConsumeCommit(deps) {
return nil, nil
}
author := deps[identity.DependencyAuthor].(int)
treeDiff := deps[items.DependencyTreeChanges].(object.Changes)
if len(treeDiff) == 0 && !devs.ConsiderEmptyCommits {
return nil, nil
}
tick := deps[items.DependencyTick].(int)
devstick, exists := devs.ticks[tick]
if !exists {
devstick = map[int]*DevTick{}
devs.ticks[tick] = devstick
}
dd, exists := devstick[author]
if !exists {
dd = &DevTick{Languages: map[string]items.LineStats{}}
devstick[author] = dd
}
dd.Commits++
if deps[core.DependencyIsMerge].(bool) {
// we ignore merge commit diffs
// TODO(vmarkovtsev): handle them
return nil, nil
}
langs := deps[items.DependencyLanguages].(map[plumbing.Hash]string)
lineStats := deps[items.DependencyLineStats].(map[object.ChangeEntry]items.LineStats)
for changeEntry, stats := range lineStats {
dd.Added += stats.Added
dd.Removed += stats.Removed
dd.Changed += stats.Changed
lang := langs[changeEntry.TreeEntry.Hash]
langStats := dd.Languages[lang]
dd.Languages[lang] = items.LineStats{
Added: langStats.Added + stats.Added,
Removed: langStats.Removed + stats.Removed,
Changed: langStats.Changed + stats.Changed,
}
}
return nil, nil
}
// Finalize returns the result of the analysis. Further Consume() calls are not expected.
func (devs *DevsAnalysis) Finalize() interface{} {
return DevsResult{
Ticks: devs.ticks,
reversedPeopleDict: devs.reversedPeopleDict,
tickSize: devs.tickSize,
}
}
// Fork clones this pipeline item.
func (devs *DevsAnalysis) Fork(n int) []core.PipelineItem {
return core.ForkSamePipelineItem(devs, n)
}
// Serialize converts the analysis result as returned by Finalize() to text or bytes.
// The text format is YAML and the bytes format is Protocol Buffers.
func (devs *DevsAnalysis) Serialize(result interface{}, binary bool, writer io.Writer) error {
devsResult := result.(DevsResult)
if binary {
return devs.serializeBinary(&devsResult, writer)
}
devs.serializeText(&devsResult, writer)
return nil
}
// Deserialize converts the specified protobuf bytes to DevsResult.
func (devs *DevsAnalysis) Deserialize(pbmessage []byte) (interface{}, error) {
message := pb.DevsAnalysisResults{}
err := proto.Unmarshal(pbmessage, &message)
if err != nil {
return nil, err
}
ticks := map[int]map[int]*DevTick{}
for tick, dd := range message.Ticks {
rdd := map[int]*DevTick{}
ticks[int(tick)] = rdd
for dev, stats := range dd.Devs {
if dev == -1 {
dev = identity.AuthorMissing
}
languages := map[string]items.LineStats{}
rdd[int(dev)] = &DevTick{
Commits: int(stats.Commits),
LineStats: items.LineStats{
Added: int(stats.Stats.Added),
Removed: int(stats.Stats.Removed),
Changed: int(stats.Stats.Changed),
},
Languages: languages,
}
for lang, ls := range stats.Languages {
languages[lang] = items.LineStats{
Added: int(ls.Added),
Removed: int(ls.Removed),
Changed: int(ls.Changed),
}
}
}
}
result := DevsResult{
Ticks: ticks,
reversedPeopleDict: message.DevIndex,
tickSize: time.Duration(message.TickSize),
}
return result, nil
}
// MergeResults combines two DevsAnalysis-es together.
func (devs *DevsAnalysis) MergeResults(r1, r2 interface{}, c1, c2 *core.CommonAnalysisResult) interface{} {
cr1 := r1.(DevsResult)
cr2 := r2.(DevsResult)
if cr1.tickSize != cr2.tickSize {
return fmt.Errorf("mismatching tick sizes (r1: %d, r2: %d) received",
cr1.tickSize, cr2.tickSize)
}
t01 := items.FloorTime(c1.BeginTimeAsTime(), cr1.tickSize)
t02 := items.FloorTime(c2.BeginTimeAsTime(), cr2.tickSize)
t0 := t01
if t02.Before(t0) {
t0 = t02
}
offset1 := int(t01.Sub(t0) / cr1.tickSize)
offset2 := int(t02.Sub(t0) / cr2.tickSize)
merged := DevsResult{}
var mergedIndex map[string]identity.MergedIndex
mergedIndex, merged.reversedPeopleDict = identity.MergeReversedDictsIdentities(
cr1.reversedPeopleDict, cr2.reversedPeopleDict)
newticks := map[int]map[int]*DevTick{}
merged.Ticks = newticks
for tick, dd := range cr1.Ticks {
tick += offset1
newdd, exists := newticks[tick]
if !exists {
newdd = map[int]*DevTick{}
newticks[tick] = newdd
}
for dev, stats := range dd {
newdev := dev
if newdev != identity.AuthorMissing {
newdev = mergedIndex[cr1.reversedPeopleDict[dev]].Final
}
newstats, exists := newdd[newdev]
if !exists {
newstats = &DevTick{Languages: map[string]items.LineStats{}}
newdd[newdev] = newstats
}
newstats.Commits += stats.Commits
newstats.Added += stats.Added
newstats.Removed += stats.Removed
newstats.Changed += stats.Changed
for lang, ls := range stats.Languages {
prev := newstats.Languages[lang]
newstats.Languages[lang] = items.LineStats{
Added: prev.Added + ls.Added,
Removed: prev.Removed + ls.Removed,
Changed: prev.Changed + ls.Changed,
}
}
}
}
for tick, dd := range cr2.Ticks {
tick += offset2
newdd, exists := newticks[tick]
if !exists {
newdd = map[int]*DevTick{}
newticks[tick] = newdd
}
for dev, stats := range dd {
newdev := dev
if newdev != identity.AuthorMissing {
newdev = mergedIndex[cr2.reversedPeopleDict[dev]].Final
}
newstats, exists := newdd[newdev]
if !exists {
newstats = &DevTick{Languages: map[string]items.LineStats{}}
newdd[newdev] = newstats
}
newstats.Commits += stats.Commits
newstats.Added += stats.Added
newstats.Removed += stats.Removed
newstats.Changed += stats.Changed
for lang, ls := range stats.Languages {
prev := newstats.Languages[lang]
newstats.Languages[lang] = items.LineStats{
Added: prev.Added + ls.Added,
Removed: prev.Removed + ls.Removed,
Changed: prev.Changed + ls.Changed,
}
}
}
}
return merged
}
func (devs *DevsAnalysis) serializeText(result *DevsResult, writer io.Writer) {
fmt.Fprintln(writer, " ticks:")
ticks := make([]int, len(result.Ticks))
{
i := 0
for tick := range result.Ticks {
ticks[i] = tick
i++
}
}
sort.Ints(ticks)
for _, tick := range ticks {
fmt.Fprintf(writer, " %d:\n", tick)
rtick := result.Ticks[tick]
devseq := make([]int, len(rtick))
{
i := 0
for dev := range rtick {
devseq[i] = dev
i++
}
}
sort.Ints(devseq)
for _, dev := range devseq {
stats := rtick[dev]
if dev == identity.AuthorMissing {
dev = -1
}
var langs []string
for lang, ls := range stats.Languages {
if lang == "" {
lang = "none"
}
langs = append(langs,
fmt.Sprintf("%s: [%d, %d, %d]", lang, ls.Added, ls.Removed, ls.Changed))
}
sort.Strings(langs)
fmt.Fprintf(writer, " %d: [%d, %d, %d, %d, {%s}]\n",
dev, stats.Commits, stats.Added, stats.Removed, stats.Changed,
strings.Join(langs, ", "))
}
}
fmt.Fprintln(writer, " people:")
for _, person := range result.reversedPeopleDict {
fmt.Fprintf(writer, " - %s\n", yaml.SafeString(person))
}
fmt.Fprintln(writer, " tick_size:", int(result.tickSize.Seconds()))
}
func (devs *DevsAnalysis) serializeBinary(result *DevsResult, writer io.Writer) error {
message := pb.DevsAnalysisResults{}
message.DevIndex = result.reversedPeopleDict
message.TickSize = int64(result.tickSize)
message.Ticks = map[int32]*pb.TickDevs{}
for tick, devs := range result.Ticks {
dd := &pb.TickDevs{}
message.Ticks[int32(tick)] = dd
dd.Devs = map[int32]*pb.DevTick{}
for dev, stats := range devs {
if dev == identity.AuthorMissing {
dev = -1
}
languages := map[string]*pb.LineStats{}
dd.Devs[int32(dev)] = &pb.DevTick{
Commits: int32(stats.Commits),
Stats: &pb.LineStats{
Added: int32(stats.Added),
Changed: int32(stats.Changed),
Removed: int32(stats.Removed),
},
Languages: languages,
}
for lang, ls := range stats.Languages {
languages[lang] = &pb.LineStats{
Added: int32(ls.Added),
Changed: int32(ls.Changed),
Removed: int32(ls.Removed),
}
}
}
}
serialized, err := proto.Marshal(&message)
if err != nil {
return err
}
_, err = writer.Write(serialized)
return err
}
// GetTickSize returns the tick size used to generate this devs analysis result.
func (dr DevsResult) GetTickSize() time.Duration {
return dr.tickSize
}
// GetIdentities returns the list of developer identities used to generate this devs analysis result.
// The format is |-joined keys, see internals/plumbing/identity for details.
func (dr DevsResult) GetIdentities() []string {
return dr.reversedPeopleDict
}
func init() {
core.Registry.Register(&DevsAnalysis{})
}