From 6da03d0c49ea3bd95bef4fb877e7774eef1e1b29 Mon Sep 17 00:00:00 2001
From: Predrag Gruevski <obi1kenobi82@gmail.com>
Date: Thu, 15 Aug 2024 02:05:29 +0000
Subject: [PATCH] Allow generating test rustdoc JSON files without git
 dependency.

---
 scripts/regenerate_test_rustdocs.sh | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/scripts/regenerate_test_rustdocs.sh b/scripts/regenerate_test_rustdocs.sh
index 20e2e0a8..5fd3534f 100755
--- a/scripts/regenerate_test_rustdocs.sh
+++ b/scripts/regenerate_test_rustdocs.sh
@@ -17,7 +17,13 @@ dir_is_newer_than_file() {
 
 export CARGO_TARGET_DIR=/tmp/test_crates
 RUSTDOC_OUTPUT_DIR="$CARGO_TARGET_DIR/doc"
-TOPLEVEL="$(git rev-parse --show-toplevel)"
+
+# Get the top-level directory of the project (the repo):
+# - If the user has cloned the git repo, ask git.
+# - Otherwise, navigate up relative to this script's path.
+#   This latter option is useful when building cargo-semver-checks for distribution with NixOS:
+#   https://github.com/obi1kenobi/cargo-semver-checks/issues/855
+TOPLEVEL="$(git rev-parse --show-toplevel 2>/dev/null || cd -- "$(dirname -- "${BASH_SOURCE[0]}" )" &>/dev/null && cd -- .. &>/dev/null && pwd)"
 TARGET_DIR="$TOPLEVEL/localdata/test_data"
 TOOLCHAIN=