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@@ -0,0 +1,112 @@
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+#!/usr/bin/env bash
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+# svn_git_sync — sync current SVN working copy into a Git mirror
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+# Usage:
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+# svn_git_sync init [mirror_name]
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+
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+set -euo pipefail
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+
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+show_usage() {
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+ echo "Usage: $0 init [mirror_name]" >&2
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+ exit 1
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+}
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+
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+subcommand="${1:-}"
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+[[ -n "$subcommand" ]] || show_usage
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+shift
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+
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+case "$subcommand" in
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+ init)
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+ ;;
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+ -h|--help|help)
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+ show_usage
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+ ;;
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+ *)
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+ echo "Unknown command: $subcommand" >&2
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+ show_usage
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+ ;;
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+esac
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+
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+SRC_DIR="$(pwd)"
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+MIRROR_ROOT="${GIT_SVN_MIRROR_ROOT:-$HOME/git_svn_mirror}"
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+
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+# Derive a collision-resistant mirror name from the full path (unless overridden).
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+raw_name="${1:-$(pwd -P)}"
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+BASE_NAME="$(printf "%s" "$raw_name" | sed 's#^[\\/]*##; s#[\\/]#_#g')"
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+DEST="${MIRROR_ROOT}/${BASE_NAME}"
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+
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+echo "Exporting SVN working copy to $DEST (versioned files only)..."
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+rm -rf -- "$DEST"
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+mkdir -p "$MIRROR_ROOT"
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+
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+# Optionally compute total items upfront for a rough percentage
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+total_items=""
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+if total=$(svn list -R . 2>/dev/null | wc -l || true); then
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+ total_items="$total"
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+fi
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+
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+start_ts="$(date +%s.%N)"
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+elapsed() {
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+ local now
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+ now="${1:-$(date +%s.%N)}"
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+ awk -v s="$start_ts" -v n="$now" 'BEGIN{split(s,sa,".");split(n,na,".");printf "%.1f", (na[1]-sa[1]) + (na[2]-sa[2])/1e9}'
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+}
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+
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+# Run export in background so we can emit our own progress based on files created.
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+svn export --quiet . "$DEST" &
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+export_pid=$!
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+
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+last_reported=-1
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+while kill -0 "$export_pid" 2>/dev/null; do
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+ if [[ -d "$DEST" ]]; then
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+ current=$(find "$DEST" -mindepth 1 -print | wc -l)
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+ else
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+ current=0
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+ fi
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+
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+ if [[ "$current" -ne "$last_reported" ]]; then
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+ elapsed_val="$(elapsed)"
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+ pct=""
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+ if [[ -n "$total_items" && "$total_items" -gt 0 ]]; then
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+ pct=$(awk -v c="$current" -v t="$total_items" 'BEGIN{printf(" (%.1f%%)", (c*100)/t)}')
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+ fi
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+ printf "[%ss] Exported %d items%s\n" "$elapsed_val" "$current" "$pct"
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+ last_reported="$current"
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+ fi
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+
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+ sleep 1
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+done
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+
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+wait "$export_pid"
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+
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+final_count=$(find "$DEST" -mindepth 1 -print | wc -l 2>/dev/null || echo 0)
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+printf "[%ss] Exported %d items (done)\n" "$(elapsed)" "$final_count"
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+
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+cd "$DEST"
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+
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+echo "[$(elapsed) s] Initializing git repository..."
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+GIT_QUIET=1 git init >/dev/null
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+git config init.defaultBranch trunk || true
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+git config core.fileMode false || true
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+git config core.autocrlf true || true
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+git config core.safecrlf false || true
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+
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+echo "[$(elapsed) s] Staging files..."
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+git add -A
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+
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+echo "[$(elapsed) s] Creating initial commit..."
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+GIT_QUIET=1 git commit -q -m "Import SVN snapshot" || true
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+
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+# Reuse the repo for the source working tree by linking .git back to the new repo.
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+echo "[$(elapsed) s] Linking git metadata to source working tree..."
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+DEST_ABS="$(pwd -P)"
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+cd "$SRC_DIR"
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+if [[ -e .git || -L .git ]]; then
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+ echo "[$(elapsed)s] Replacing existing .git in $SRC_DIR..."
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+ rm -rf -- .git
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+fi
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+printf "gitdir: %s/.git\n" "$DEST_ABS" > .git
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+echo "[$(elapsed)s] Linked .git to $DEST_ABS/.git"
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+
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+# Normalize working tree to match repo filters (e.g., CRLF handling).
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+echo "[$(elapsed) s] Syncing working tree to repo content..."
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+GIT_QUIET=1 git checkout -q -- .
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