From cc3f1c1de0ef241f4cae08afb614c8d891d0a847 Mon Sep 17 00:00:00 2001
From: Daniel Goertzen <daniel.goertzen@gmail.com>
Date: Fri, 3 Jun 2022 16:36:19 -0500
Subject: [PATCH 1/2] force fetchGit allRefs when a dependency is specified
 with "rev"

The usage of git "rev" dependencies in Cargo implies that the rev
will be found regardless of ref.  This is currently not true in naersk;
the following dependency fails:

usbfs = {git = "https://github.com/goertzenator/usbfs-rs", rev = "7c35b46e41ad76f838cd99b493f9337f475b5b70"}
---
 lib.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib.nix b/lib.nix
index fa592c2..6dd306b 100644
--- a/lib.nix
+++ b/lib.nix
@@ -111,7 +111,7 @@ rec
           ref = lock.branch;
         } // lib.optionalAttrs (lock ? tag) {
           ref = lock.tag;
-        } // lib.optionalAttrs gitAllRefs {
+        } // lib.optionalAttrs (gitAllRefs || lock ? rev) {
           allRefs = true;
         } // lib.optionalAttrs gitSubmodules {
           submodules = true;

From f6aa3915d003beb96cbcd2f00477ea1caa811cc8 Mon Sep 17 00:00:00 2001
From: Daniel Goertzen <daniel.goertzen@gmail.com>
Date: Mon, 6 Jun 2022 09:31:15 -0500
Subject: [PATCH 2/2] remove fetchGit allRefs flag for nix <2.4

Prevent use of allRefs when nix <2.4 is in use.
nix <2.4 does not accept the `allRefs` flag, but has `allRefs` behavior
by default.  Note that this goes beyond the the initial intent of this
PR because it enables naersk's `gitAllRefs` flag to work on nix <2.4.
---
 lib.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib.nix b/lib.nix
index 6dd306b..bd31e28 100644
--- a/lib.nix
+++ b/lib.nix
@@ -111,7 +111,7 @@ rec
           ref = lock.branch;
         } // lib.optionalAttrs (lock ? tag) {
           ref = lock.tag;
-        } // lib.optionalAttrs (gitAllRefs || lock ? rev) {
+        } // lib.optionalAttrs ((lib.versionAtLeast builtins.nixVersion "2.4") && (gitAllRefs || lock ? rev)) {
           allRefs = true;
         } // lib.optionalAttrs gitSubmodules {
           submodules = true;