Ongoing mangling

1 files changed, 45 insertions, 0 deletions

diff --git a/create-git.sh b/create-git.sh
new file mode 100755
index 0000000..6389024
--- /dev/null
+++ b/create-git.sh
@@ -0,0 +1,45 @@
+#!/bin/bash
+
+proc_count=$(grep -c MHz /proc/cpuinfo)
+[ ${proc_count} -eq 0 ] && proc_count=1
+root="$(pwd)"
+mkdir -p git
+rm -rf git/* git/.git
+set -f
+mkdir -p git
+cd git
+git init --bare
+git config core.logAllRefUpdates false
+git config prune.expire now
+mkdir -p objects/info
+targets=( $(find ../final/ -maxdepth 1 -mindepth 1 -printf '../final/%P/\n' | \
+    xargs -n1 readlink -f | tee >(sed -e 's:$:/git/objects:' > objects/info/alternates) ) )
+for x in "${targets[@]}"; do
+  rev=$(git --git-dir $x/git rev-list -1 master 2> /dev/null)
+  [ -z "$rev" ] && { echo "no content: $x"; continue; }
+  x="refs/heads/source/$(basename $x)"
+  git update-ref "$x" $rev
+done
+
+echo "linearizing history, and rewriting messages..."
+
+time (
+  git fast-export --progress=1000 --all --reverse --date-order --no-data | \
+    tee ../export-stream-raw | \
+    "${root}/rewrite-commit-dump.py" | \
+    tee ../export-stream-rewritten | \
+    git fast-import
+) 2>&1 | tee git-creation.log
+
+echo "recomposed; repacking and breaking alternate linkage..."
+# Wipe the strong refs to the other repos...
+git ls-remote . refs/heads/source/'*' | awk '{print $2;}' | xargs -n1 git update-ref -d
+# Localize the content...
+time git repack -Adf --window=100 --depth=100
+# Wipe the alternates.
+rm objects/info/alternates
+echo "doing cleanup..."
+time git prune
+echo "doing basic sanity check"
+time git log -p refs/heads/master > /dev/null || echo "non zero exit code from git log run..."
+echo "Done"