msoucy/git-by-a-truck
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Refactor

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This commit is contained in:
Matt Soucy 2020-07-03 10:55:03 -04:00
parent 6701ec3df0
commit c460632dec
9 changed files with 236 additions and 43 deletions
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7
build.gradle
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@ -19,8 +19,9 @@ repositories {
dependencies {
implementation 'org.jetbrains.kotlin:kotlin-stdlib'
implementation "com.xenomachina:kotlin-argparser:$kotlin_argparser_version"
implementation "org.jetbrains.exposed:exposed-core:0.24.1"
implementation "org.jetbrains.exposed:exposed-dao:0.24.1"
implementation "org.jetbrains.exposed:exposed-jdbc:0.24.1"
implementation "org.jetbrains.exposed:exposed-core:0.25.1"
implementation "org.jetbrains.exposed:exposed-dao:0.25.1"
implementation "org.jetbrains.exposed:exposed-jdbc:0.25.1"
compile("org.xerial:sqlite-jdbc:3.30.1")
testImplementation 'junit:junit:4.12'
}

56
src/main/kotlin/me/msoucy/gbat/Analyze.kt
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@ -1,27 +1,51 @@
package me.msoucy.gbat
import java.io.File
import org.jetbrains.exposed.sql.*
import org.jetbrains.exposed.sql.transactions.transaction
import me.msoucy.gbat.models.CondensedAnalysis
import me.msoucy.gbat.models.Condensation
import me.msoucy.gbat.models.KnowledgeModel
import me.msoucy.gbat.models.LineModel
import me.msoucy.gbat.models.RiskModel
private data class Condensation(val authors : List<String>, val knowledge : Double, val orphaned : Double, val atRisk : Double = 0.0) : Comparable<Condensation> {
override operator fun compareTo(other : Condensation) : Int {
return -1
}
}
private class Result(val repoRoot : File,
val projectRoot : File,
val fname : File,
val results : List<Pair<String, List<Condensation>>>)
fun analyze(
repoRoot : String,
projectRoot : String,
fname : String,
riskModel : RiskModel,
createdConstant : Double,
historyItem : HistoryItem,
verbose : Boolean = false
) : CondensedAnalysis {
val lineModel = LineModel()
val db = Database.connect("jdbc:sqlite:memory:", "org.sqlite.JDBC")
val knowledgeModel = KnowledgeModel(db, createdConstant, riskModel)
var changesProcessed = 0
private fun condenseAnalysis(repoRoot : File,
projectRoot : File,
fname : File,
lineModel : LineModel,
knowledgeModel : KnowledgeModel,
riskModel : RiskModel) : Result {
historyItem.authorDiffs.forEach { (author, changes) ->
changes.forEach { change ->
changesProcessed++
if(changesProcessed % 1000 == 0 && verbose) {
System.err.println("Analyzer applied change #${changesProcessed}")
}
lineModel.apply(change.eventType, change.lineNum, change.lineVal ?: "")
knowledgeModel.apply(change.eventType, author, change.lineNum)
}
}
return condenseAnalysis(repoRoot, projectRoot, fname, lineModel, knowledgeModel, riskModel)
}
private fun condenseAnalysis(
repoRoot : String,
projectRoot : String,
fname : String,
lineModel : LineModel,
knowledgeModel : KnowledgeModel,
riskModel : RiskModel
) : CondensedAnalysis {
val condensations = lineModel.get().mapIndexed { idx, line ->
val knowledges = knowledgeModel.knowledgeSummary(idx + 1).map { (authors, knowledge) ->
Condensation(authors,
@ -31,5 +55,5 @@ private fun condenseAnalysis(repoRoot : File,
}.sorted()
Pair(line, knowledges)
}
return Result(repoRoot, projectRoot, fname, condensations)
return CondensedAnalysis(repoRoot, projectRoot, fname, condensations.mutableCopyOf())
}

15
src/main/kotlin/me/msoucy/gbat/Main.kt
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@ -93,11 +93,11 @@ fun main(args: Array<String>) = mainBody {
}
}
val risk_thresh = risk_threshold ?: default_bus_risk.pow(3)
val riskThresh = risk_threshold ?: default_bus_risk.pow(3)
val interesting_res = parse_interesting(if (interesting.isEmpty()) DEFAULT_INTERESTING_RES else interesting)
val not_interesting_res = if (not_interesting.isEmpty()) listOf() else parse_interesting(not_interesting)
val project_root_file = File(project_root).also {
val projectRootFile = File(project_root).also {
if(!it.isDirectory)
throw InvalidArgumentException("Provided project root does not exist")
}
@ -125,7 +125,14 @@ fun main(args: Array<String>) = mainBody {
}
val pool = Executors.newFixedThreadPool(num_analyzer_procs + num_git_procs + 1)
fnames.forEach { fname ->
pool.submit {
parseHistory(repo, projectRootFile, File(fname))
}
}
val summ_result = mutableListOf<Int>()
}
val dbFname = File(outDir, "summary.db")
}
}

139
src/main/kotlin/me/msoucy/gbat/ParseHistory.kt Normal file
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@ -0,0 +1,139 @@
package me.msoucy.gbat
import java.io.File
import kotlin.math.abs
import kotlin.math.max
import me.msoucy.gbat.models.ChangeType
import me.msoucy.gbat.models.Event
data class HistoryItem(
val repoRoot : File,
val projectRoot : File,
val fname : File,
val authorDiffs : List<Pair<String, List<Event>>>
)
fun parseHistory(repo : GitRepo,
projectRoot : File,
fname : File,
verbose : Boolean = false) : HistoryItem {
val entries = repo.log(fname)
val repoRoot = repo.root()
if(verbose) {
System.err.println("Parsing history for ${fname}")
}
return HistoryItem(repoRoot, projectRoot, fname,
entries.map { (author, diff) ->
Pair(author.trim(), diffWalk(diff))
}
)
}
fun diffWalk(diff : Diff) : List<Event> {
fun String.startsChunk() = startsWith("@@")
fun String.isOldLine() = startsWith("-")
fun String.isNewLine() = startsWith("+")
fun chunkify() : List<List<String>> {
val chunks = mutableListOf<MutableList<String>>()
var curChunk = mutableListOf<String>()
diff.split("\n").forEach { line ->
if(line.startsChunk()) {
if(curChunk.isNotEmpty()) {
chunks.add(curChunk)
curChunk = mutableListOf<String>()
}
curChunk.add(line)
} else if(curChunk.isNotEmpty()) {
curChunk.add(line)
}
}
if(curChunk.isNotEmpty()) {
chunks.add(curChunk)
}
return chunks
}
val chunks = chunkify()
val events = mutableListOf<Event>()
class Hunk(
val lineNum : Int,
val oldLines : List<String>,
val newLines : List<String>
)
fun hunkize(chunkWoHeader : List<String>, firstLineNum : Int) : List<Hunk> {
var curOld = mutableListOf<String>()
var curNew = mutableListOf<String>()
var curLine = firstLineNum
var hunks = mutableListOf<Hunk>()
chunkWoHeader.forEach { line ->
if(line.isOldLine()) {
curOld.add(line)
} else if(line.isNewLine()) {
curNew.add(line)
} else if(curOld.isNotEmpty() || curNew.isNotEmpty()) {
hunks.add(Hunk(curLine, curOld, curNew))
curLine += curNew.size + 1
curOld = mutableListOf<String>()
curNew = mutableListOf<String>()
} else {
curLine++
}
}
if(curOld.isNotEmpty() || curNew.isNotEmpty()) {
hunks.add(Hunk(curLine, curOld, curNew))
}
return hunks
}
fun stepHunk(hunk : Hunk) {
val oldLen = hunk.oldLines.size
val newLen = hunk.newLines.size
val maxLen = max(oldLen, newLen)
var lineNum = hunk.lineNum
for (i in 0..maxLen) {
if(i < oldLen && i < newLen) {
events += Event(
ChangeType.Change,
lineNum,
hunk.newLines[i].substring(1)
)
}
}
}
fun stepChunk(chunk : List<String>) {
val header = chunk[0]
// format of header is
//
// @@ -old_line_num,cnt_lines_in_old_chunk, +new_line_num,cnt_lines_in_new_chunk
//
val (_, lineInfo, _) = header.split("@@")
val offsets = lineInfo.trim().split(" ")
// we only care about the new offset, since in the first chunk
// of the file the new and old are the same, and since we add
// and subtract lines as we go, we should stay in step with the
// new offsets.
val newOffset = offsets[1].split(",").map{
abs(it.toInt())
}.first()
// a hunk is a group of contiguous - + lines
val hunks = hunkize(chunk.subList(1, chunk.size), newOffset)
hunks.forEach(::stepHunk)
}
chunks.forEach(::stepChunk)
return events
}

4
src/main/kotlin/me/msoucy/gbat/Repo.kt
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@ -20,14 +20,14 @@ class GitRepo(val projectRoot : File, val git_exe : String) {
return out ?: ""
}
fun root() : String? {
fun root() : File {
val cmd = listOf(
git_exe,
"rev-parse",
"--show-toplevel"
)
val (out, _) = cmd.runCommand(projectRoot)
return out
return File(out)
}
fun log(fname : File) : List<Pair<String, Diff>> {

2
src/main/kotlin/me/msoucy/gbat/models/KnowledgeModel.kt
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@ -45,7 +45,7 @@ class KnowledgeModel(val db : Database, val constant : Double, val riskModel : R
val SAFE_KNOWLEDGE_ACCT_ID = 1
val KNOWLEDGE_PER_LINE_ADDED = 1000.0
fun applyChange(changeType : ChangeType, author : String, lineNum : Int) = when(changeType) {
fun apply(changeType : ChangeType, author : String, lineNum : Int) = when(changeType) {
ChangeType.Add -> lineAdded(author, lineNum)
ChangeType.Change -> lineChanged(author, lineNum)
ChangeType.Remove -> lineRemoved(lineNum)

2
src/main/kotlin/me/msoucy/gbat/models/LineModel.kt
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@ -12,7 +12,7 @@ class LineModel() {
inner class Line(var num : Int, var text : String)
val model = mutableSetOf<Line>()
fun applyChange(changeType : ChangeType, lineNum : Int, lineText : String) = when(changeType) {
fun apply(changeType : ChangeType, lineNum : Int, lineText : String) = when(changeType) {
ChangeType.Add -> add(Line(lineNum, lineText))
ChangeType.Change -> change(Line(lineNum, lineText))
ChangeType.Remove -> del(Line(lineNum, lineText))

38
src/main/kotlin/me/msoucy/gbat/models/Models.kt
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@ -2,4 +2,40 @@ package me.msoucy.gbat.models
enum class ChangeType {
Add, Change, Remove
}
}
data class Event(
val eventType : ChangeType,
val lineNum : Int,
val lineVal : String?
)
data class Condensation(
val authors : List<String>,
val knowledge : Double,
val orphaned : Double,
val risk : Double = 0.0
) : Comparable<Condensation> {
override operator fun compareTo(other : Condensation) : Int {
var result = authors.size.compareTo(other.authors.size)
if(result == 0) {
authors.zip(other.authors).forEach { (a, b) ->
if(result == 0) result = a.compareTo(b)
}
}
if(result == 0)
result = knowledge.compareTo(other.knowledge)
if(result == 0)
result = orphaned.compareTo(other.orphaned)
if(result == 0)
result = risk.compareTo(other.risk)
return result
}
}
class CondensedAnalysis(
var repoRoot : String = "",
var projectRoot : String = "",
var fileName : String = "",
var lineSummaries : MutableList<Pair<String, List<Condensation>>> = mutableListOf()
)

16
src/main/kotlin/me/msoucy/gbat/models/SummaryModel.kt
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@ -7,20 +7,6 @@ import org.jetbrains.exposed.dao.id.IntIdTable
import org.jetbrains.exposed.sql.*
import org.jetbrains.exposed.sql.transactions.transaction
class CondensedAnalysis {
class LineSummary {
var authors = listOf<String>()
var knowledge = 0.0
var risk = 0.0
var orphaned = 0.0
}
var repoRoot = ""
var project = ""
var projectRoot = ""
var fileName = ""
var lineSummaries = mutableListOf<Pair<String, List<LineSummary>>>()
}
class SummaryModel(val db : Database) {
object ProjectTable : IntIdTable("projects", "projectid") {
@ -112,7 +98,7 @@ class SummaryModel(val db : Database) {
fun summarize(ca : CondensedAnalysis) {
val fname = adjustFname(File(ca.repoRoot), File(ca.projectRoot), File(ca.fileName))
val projectId = findOrCreateProject(ca.project)
val projectId = findOrCreateProject(ca.projectRoot)
var parentDirId = 0
splitAllDirs(fname.parentFile).forEach {