From 8d462d3531a702655c5b81c6c6c9409d6a320150 Mon Sep 17 00:00:00 2001
From: Raja R Harinath <harinath@hurrynot.org>
Date: Mon, 5 Jul 2010 21:36:28 +0530
Subject: Move SVN revision to fast-import mark mapping to the per-branch
 datastructure.

A single SVN revision can affect multiple branches in the same repository.
Keeping track of only one mark per revision loses information and makes
the history incorrect.
---
 src/repository.cpp | 57 +++++++++++++++++++++++++++++-------------------------
 src/repository.h   |  2 +-
 2 files changed, 32 insertions(+), 27 deletions(-)

(limited to 'src')

diff --git a/src/repository.cpp b/src/repository.cpp
index 059dbf6..5250f71 100644
--- a/src/repository.cpp
+++ b/src/repository.cpp
@@ -156,28 +156,28 @@ void Repository::createBranch(const QString &branch, int revnum,
         exit(1);
     }
 
-    // now create the branch
-    br.created = revnum;
-    br.commits.append(revnum);
-
-    QByteArray branchFromRef, branchFromDesc;
-
-    int closestCommit = branchRevNum;
+    int mark = 0;
+    QByteArray branchFromDesc = "from branch " + branchFrom.toUtf8();
     if (branchRevNum == brFrom.commits.last()) {
-        branchFromDesc = "from branch " + branchFrom.toUtf8();
+	mark = brFrom.marks.last();
     } else {
         QVector<int>::const_iterator it = qUpperBound(brFrom.commits, branchRevNum);
-        closestCommit = it == brFrom.commits.begin() ? branchRevNum : *--it;
-	branchFromDesc = "from branch " + branchFrom.toUtf8() + " at r" + QByteArray::number(branchRevNum);
-	if (closestCommit != branchRevNum)
-	    branchFromDesc += " => r" + QByteArray::number(closestCommit);
+	if (it != brFrom.commits.begin()) {
+	    int closestCommit = *--it;
+	    mark = brFrom.marks[it - brFrom.commits.begin()];
+	    branchFromDesc += " at r" + QByteArray::number(branchRevNum);
+	    if (closestCommit != branchRevNum)
+		branchFromDesc += " => r" + QByteArray::number(closestCommit);
+	}
     }
 
-    if(commitMarks.contains(closestCommit)) {
-        int mark = commitMarks[closestCommit];
-        branchFromRef = ":" + QByteArray::number(mark);
-	commitMarks[revnum] = mark;
-    } else {
+    // now create the branch
+    br.created = revnum;
+    br.commits.append(revnum);
+    br.marks.append(mark);
+
+    QByteArray branchFromRef = ":" + QByteArray::number(mark);
+    if (!mark) {
         qWarning() << branch << "in repository" << name << "is branching but no exported commits exist in repository"
                 << "creating an empty branch.";
         branchFromRef = branchFrom.toUtf8();
@@ -339,21 +339,26 @@ void Repository::Transaction::noteCopyFromBranch (const QString &branchFrom, int
 	return;
     }
 
-    int closestCommit = branchRevNum;
-    if (branchRevNum != brFrom.commits.last()) {
+    int mark = 0;
+
+    if (branchRevNum == brFrom.commits.last()) {
+	mark = brFrom.marks.last();
+    } else {
         QVector<int>::const_iterator it = qUpperBound(brFrom.commits, branchRevNum);
-        closestCommit = it == brFrom.commits.begin() ? branchRevNum : *--it;
+	if (it != brFrom.commits.begin()) {
+	    --it;
+	    mark = brFrom.marks[it - brFrom.commits.begin()];
+	}
     }
 
-    if (!repository->commitMarks.contains(closestCommit)) {
-	qWarning() << "Unknown revision r" << QByteArray::number(closestCommit)
-		   << ".  Continuing, assuming the files exist.";
+    if (!mark) {
+	qWarning() << "Unknown revision r" << QByteArray::number(branchRevNum)
+		       << ".  Continuing, assuming the files exist.";
 	return;
     }
 
     qWarning() << "repository " + repository->name + " branch " + branch + " has some files copied from " + branchFrom + "@" + QByteArray::number(branchRevNum);
 
-    int mark = repository->commitMarks[closestCommit];
     if (!merges.contains(mark))
 	merges.append(mark);
 }
@@ -407,13 +412,14 @@ void Repository::Transaction::commit()
     int parentmark = 0;
     Branch &br = repository->branches[branch];
     if (br.created) {
-	parentmark = repository->commitMarks[br.commits.last()];
+	parentmark = br.marks.last();
     } else {
 	qWarning() << "Branch" << branch << "in repository" << repository->name << "doesn't exist at revision"
 		   << revnum << "-- did you resume from the wrong revision?";
 	br.created = revnum;
     }
     br.commits.append(revnum);
+    br.marks.append(mark);
 
     {
         QByteArray branchRef = branch;
@@ -423,7 +429,6 @@ void Repository::Transaction::commit()
         QTextStream s(&repository->fastImport);
         s << "commit " << branchRef << endl;
         s << "mark :" << QByteArray::number(mark) << endl;
-        repository->commitMarks.insert(revnum, mark);
         s << "committer " << QString::fromUtf8(author) << ' ' << datetime << " -0000" << endl;
 
         s << "data " << message.length() << endl;
diff --git a/src/repository.h b/src/repository.h
index 020e1f6..f30b49f 100644
--- a/src/repository.h
+++ b/src/repository.h
@@ -77,6 +77,7 @@ private:
     {
         int created;
         QVector<int> commits;
+	QVector<int> marks;
     };
     struct AnnotatedTag
     {
@@ -90,7 +91,6 @@ private:
 
     QHash<QString, Branch> branches;
     QHash<QString, AnnotatedTag> annotatedTags;
-    QHash<int, int> commitMarks;
     QString name;
     QProcess fastImport;
     int commitCount;
-- 
cgit v1.2.1