From fc6813194b819262bcb81129b169069c14c4c3e0 Mon Sep 17 00:00:00 2001
From: Colin Guthrie <colin@mageia.org>
Date: Tue, 30 Jul 2013 00:11:45 +0100
Subject: Add a script to just import Mageia only svn.

i.e. for projects where no Mandriva project exists.
---
 scripts/mageia-import.sh | 221 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 221 insertions(+)
 create mode 100755 scripts/mageia-import.sh

diff --git a/scripts/mageia-import.sh b/scripts/mageia-import.sh
new file mode 100755
index 0000000..26c4301
--- /dev/null
+++ b/scripts/mageia-import.sh
@@ -0,0 +1,221 @@
+#!/bin/bash
+
+NEWSVNURL="file:///home/colin/svn-git/soft"
+NEWSVNUUID=$(svn info $NEWSVNURL | grep "^Repository UUID: " | cut -d' ' -f3)
+
+SOFTWARE=$1
+if [ -z $SOFTWARE ]; then
+  echo "Missing software to convert..."
+  exit 1
+fi
+
+if [ -d $SOFTWARE-origin ]; then
+  echo "It seems the svn-git repository already exists ($SOFTWARE-origin)"
+  exit 1
+fi
+
+if [ -d $SOFTWARE.git ]; then
+  echo "It seems the converted git repository already exists ($SOFTWARE.git)"
+  exit 1
+fi
+
+skiprevisions=
+skiprevisionsx="$2"
+if [ -n "$skiprevisionsx" ]; then
+  for rev in $skiprevisionsx; do
+    rev=$(echo $rev | sed 's/r//g')
+    rev=$(( $rev + 0 ))
+    if [ $rev -gt 0 ]; then
+      skiprevisions="$skiprevisions $rev"
+    fi
+  done
+fi
+
+echo "Identified software name: $SOFTWARE"
+echo "SVN Revisions to skip:    $skiprevisions"
+echo
+
+git svn init $NEWSVNURL/$SOFTWARE --no-metadata --stdlayout $SOFTWARE-origin
+cd $SOFTWARE-origin
+revision=0
+if [ -n "$skiprevisions" ]; then
+  for rev in $skiprevisions; do
+    git svn fetch -A ../authors-transform.txt -r $(( $revision + 1 )):$(( $rev - 1 ))
+    revision=$rev
+  done
+fi
+git svn fetch -A ../authors-transform.txt -r $(( $revision + 1 )):HEAD
+git reset --hard trunk
+echo
+echo "done"
+
+
+echo
+echo "Now creating bare git repository"
+git init --bare ../$SOFTWARE.git
+git remote rm origin
+git remote add origin ../$SOFTWARE.git
+#git push --set-upstream master
+git push origin master 'refs/remotes/*:refs/heads/*'
+
+pushd ../$SOFTWARE.git
+git branch -D trunk
+git branch -D origin/master 2>/dev/null
+
+# Tagging logic inspired by https://github.com/nothingmuch/git-svn-abandon/blob/master/git-svn-abandon-fix-refs
+# Keep a map of tags and their original sha1 for the SQL database cerated below
+declare -A tagmap
+tags=$(git for-each-ref --format='%(refname)' refs/heads/tags | cut -d / -f 4)
+for tag in $tags; do
+  ref="refs/heads/tags/$tag"
+  refsha1=$(git rev-parse "$ref")
+  reftreesha1=$(git rev-parse "$ref":)
+
+  # Find the oldest ancestor for which the tree is the same
+  parentref="$ref"
+  while [ $(git rev-parse --quiet --verify "$parentref"^:) = "$reftreesha1" ]; do
+    parentref="$parentref"^
+  done
+  parent=$(git rev-parse "$parentref")
+
+  # If this ancestor is in master then we can just tag it
+  # otherwise the tag has diverged from master and it's actually more like a
+  # branch than a tag
+  merge=$(git merge-base master $parent)
+  if [ "$merge" = "$parent" ]; then
+    targetref=$parent
+  else
+    targetref=$refsha1
+  fi
+
+  tagmap[$refsha1]=$tag
+
+  # create an annotated tag based on the last commit in the tag, and delete the "branchy" ref for the tag
+  git show -s --pretty='format:%s%n%n%b' "$ref" | \
+    env GIT_COMMITTER_NAME="$(git show -s --pretty='format:%an' "$ref")" \
+        GIT_COMMITTER_EMAIL="$(git show -s --pretty='format:%ae' "$ref")" \
+        GIT_COMMITTER_DATE="$(git show -s --pretty='format:%ad' "$ref")" \
+        GIT_AUTHOR_NAME="$(git show -s --pretty='format:%an' "$ref")" \
+        GIT_AUTHOR_EMAIL="$(git show -s --pretty='format:%ae' "$ref")" \
+        GIT_AUTHOR_DATE="$(git show -s --pretty='format:%ad' "$ref")" \
+        git tag -a -F - "$tag" "$targetref"
+
+  git update-ref -d "$ref"
+done
+
+# Implement a branch name policy
+#   1. Branches matching ([1-3]) are renamed to distro/mga\1
+#   2. Branches matching (20[0-9\.]+) are renamed to distro/mdv\1
+#   3. Branches matching (mes[0-9].*) are renamed to distro/\1
+#   4. All other branches are renamed to topic/\1 (excl. master)
+
+branches=$(git for-each-ref --format='%(refname)' refs/heads | cut -d / -f 3-)
+for branch in $branches; do
+  ref="refs/heads/$branch"
+  refsha1=$(git rev-parse "$ref")
+  reftreesha1=$(git rev-parse "$ref":)
+
+  # Find the oldest ancestor for which the tree is the same
+  parentref="$ref"
+  while [ $(git rev-parse --quiet --verify "$parentref"^:) = "$reftreesha1" ]; do
+    parentref="$parentref"^
+  done
+  parent=$(git rev-parse "$parentref")
+
+  # If this ancestor is in master then we can just squash it
+  # otherwise the branch has diverged from master and it's actually a proper
+  # branch
+  merge=$(git merge-base master $parent)
+  if [ "$merge" = "$parent" ]; then
+    git update-ref "$ref" $parent $refsha1
+  fi
+
+  if (echo $branch | grep -qE '^[0-3]$'); then
+    git branch -m $branch distro/mga$branch
+  elif (echo $branch | grep -qE '^20[0-9\.]+$'); then
+    git branch -m $branch distro/mdv$branch
+  elif (echo $branch | grep -qE '^mes[0-9].*$'); then
+    git branch -m $branch distro/$branch
+  elif [ "$branch" != "master" ]; then
+    git branch -m $branch topic/$branch
+  fi
+done
+
+git gc --aggressive
+popd
+
+
+# And finally we create some SQL for creating a nice revision map database
+
+# CREATE TABLE refs (distro char(3) NOT NULL, soft varchar(255) NOT NULL, revision int(10) unsigned NOT NULL,  sha1 char(40) NOT NULL, head varchar(255) NOT NULL);
+
+# Parse a git-svn revmap file into SQL
+# $1 = Name of revmap file
+# $2 = Distro ('mdv' or 'mga')
+# $3 = head name i.e. branch or tag name (only used when not processing trunk/master)
+# $4 = Special SHA1 (last sha1 to look for if 'mdv', fake sha1 commit if 'mga')
+parsesvnrevmap()
+{
+  if [ ! -f "$1" ]; then
+    echo "No such file '$1'" >&2
+    exit 1
+  fi
+  for map in $(cat "$1" | xxd -c24 -g24  | cut -b 10-57); do
+    sha1=$(echo $map | cut -b 9-)
+    if [ "$sha1" = "0000000000000000000000000000000000000000" ]; then
+      continue
+    fi
+    if [ -n "$4" -a "$2" = "mga" -a "$sha1" = "$4" ]; then
+      continue
+    fi
+    rev=$(printf "%d" 0x$(echo $map | cut -b 1-8))
+
+    if [ -n "${tagmap[$sha1]}" ]; then
+      echo "INSERT INTO refs VALUES('$2', '$SOFTWARE', $rev, '', '${tagmap[$sha1]}');"
+    else
+      branch=$3
+      if [ -n "$branch" ]; then
+        if (echo $branch | grep -qE '^[0-3]$'); then
+          branch=distro/mga$branch
+        elif (echo $branch | grep -qE '^20[0-9\.]+$'); then
+          branch=distro/mdv$branch
+        elif (echo $branch | grep -qE '^mes[0-9].*$'); then
+          branch=distro/$branch
+        elif [ "$branch" != "master" ]; then
+          branch=topic/$branch
+        fi
+      fi
+      echo "INSERT INTO refs VALUES('$2', '$SOFTWARE', $rev, '$sha1', '$branch');"
+    fi
+
+    # Exit if we've reached our reset sha1 as any future revisions are not used
+    # by Mageia
+    if [ -n "$4" -a "$2" = "mdv" -a "$sha1" = "$4" ]; then
+      break
+    fi
+  done
+}
+
+echo
+echo -n "Creating revision -> sha1 map SQL... "
+
+sql="../$SOFTWARE-revmap.sql"
+rm -f "$sql" "$sql".xz
+
+# Mageia commits
+revmap=".git/svn/refs/remotes/trunk/.rev_map.$NEWSVNUUID"
+if [ -f "$revmap" ]; then
+  parsesvnrevmap "$revmap" "mga" "" $fakesha1 >>"$sql"
+fi
+for revmap in $(find .git/svn/refs/remotes/tags -name .rev_map.$NEWSVNUUID 2>/dev/null); do
+  # Note, still pass in the tag name in case the tag is really more of a branch...
+  parsesvnrevmap "$revmap" "mga" "$(echo $revmap | cut -d'/' -f6)" >>"$sql"
+done
+for revmap in $(find .git/svn/refs/remotes -maxdepth 2 -not -iwholename ".git/svn/refs/remotes/trunk/.rev_map.*" -name .rev_map.$NEWSVNUUID 2>/dev/null); do
+  parsesvnrevmap "$revmap" "mga" "$(echo $revmap | cut -d'/' -f5)" >>"$sql"
+done
+
+xz "$sql"
+
+cd ..
+echo "done"
-- 
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