From dc253552dbde8d18b94de19909c5cdb23190ffdb 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 | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/esp-idf/default.nix b/pkgs/esp-idf/default.nix
index 80ab65c..524e12b 100644
--- a/pkgs/esp-idf/default.nix
+++ b/pkgs/esp-idf/default.nix
@@ -120,6 +120,12 @@ stdenv.mkDerivation rec {
   dontUseNinjaCheck = true;
 
   installPhase = ''
+    # make esp-idf cmake git version detection happy
+    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"
+
     mkdir -p $out
     cp -rv . $out/