From 970f693bfaf9b20c8aabdcf6409fc60c9f76b360 Mon Sep 17 00:00:00 2001
From: Moritz Bitsch <moritz@h6t.eu>
Date: Tue, 20 Feb 2024 13:01:26 +0100
Subject: [PATCH] workaround esp-idf version detection

If version.txt is missing some part of the cmake toolchain tries to read
refs/heads/fetchgit in the idf repo which failed.

This is not a perfect solution, but works nicely when using cargo.
---
 pkgs/esp-idf/default.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/esp-idf/default.nix b/pkgs/esp-idf/default.nix
index 2c8d2cf..e5a0173 100644
--- a/pkgs/esp-idf/default.nix
+++ b/pkgs/esp-idf/default.nix
@@ -132,5 +132,12 @@ stdenv.mkDerivation rec {
     #   directory to PYTHONPATH.
     ln -s ${customPython} $out/python-env
     ln -s ${customPython}/lib $out/lib
+
+    # make esp-idf cmake git version detection happy
+    cd $out
+    git init .
+    git config user.email "nixbld@localhost"
+    git config user.name "nixbld"
+    git commit --date="1970-01-01 00:00:00" --allow-empty -m "make idf happy"
   '';
 }