From 6d6f0d85a31d93302950e713e3e16c5f9bd31d17 Mon Sep 17 00:00:00 2001
From: Bryan Bennett <Bryan.Bennett@protonmail.com>
Date: Mon, 31 Jan 2022 13:15:20 -0500
Subject: [PATCH 1/3] Declare (and enforce) a minimum direnv version

2.21.3 introduces extglob to direnv's stdlib.
This means we need at least 2.21.3 to execute nix_direnv_version.
This just enforces a previously unstated dependency.
---
 direnvrc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/direnvrc b/direnvrc
index 4f924e6..089349d 100644
--- a/direnvrc
+++ b/direnvrc
@@ -3,6 +3,11 @@
 # Usage: nix_direnv_version <version_at_least>
 #
 # Checks that the nix-direnv version is at least as old as <version_at_least>.
+
+if ! has direnv_version || ! direnv_version 2.21.3; then
+  exit
+fi
+
 nix_direnv_version() {
   declare major='1' minor='5' patch='1' # UPDATE(nix-direnv version)
 

From effc976ce73fdddd32d41b6c318363a5532da442 Mon Sep 17 00:00:00 2001
From: Bryan Bennett <Bryan.Bennett@protonmail.com>
Date: Mon, 31 Jan 2022 13:26:21 -0500
Subject: [PATCH 2/3] Use non-zero exit code for error status

---
 direnvrc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/direnvrc b/direnvrc
index 089349d..445c3d3 100644
--- a/direnvrc
+++ b/direnvrc
@@ -5,7 +5,7 @@
 # Checks that the nix-direnv version is at least as old as <version_at_least>.
 
 if ! has direnv_version || ! direnv_version 2.21.3; then
-  exit
+  exit 1
 fi
 
 nix_direnv_version() {

From c6db289e0f38c352688468fb41456f2c0da7fe76 Mon Sep 17 00:00:00 2001
From: Bryan Bennett <Bryan.Bennett@protonmail.com>
Date: Wed, 2 Feb 2022 14:23:59 -0500
Subject: [PATCH 3/3] Print a more useful error on old direnv versions

---
 direnvrc | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/direnvrc b/direnvrc
index 445c3d3..14b6380 100644
--- a/direnvrc
+++ b/direnvrc
@@ -1,13 +1,16 @@
 # shellcheck shell=bash
 
+REQUIRED_DIRENV_VERSION="2.21.3"
+
+
+if ! has direnv_version || ! direnv_version "$REQUIRED_DIRENV_VERSION" 2>/dev/null; then
+  printf '%s\n' "nix-direnv: base direnv version is older than the required v$REQUIRED_DIRENV_VERSION." >&2
+  exit 1
+fi
+
 # Usage: nix_direnv_version <version_at_least>
 #
 # Checks that the nix-direnv version is at least as old as <version_at_least>.
-
-if ! has direnv_version || ! direnv_version 2.21.3; then
-  exit 1
-fi
-
 nix_direnv_version() {
   declare major='1' minor='5' patch='1' # UPDATE(nix-direnv version)