From 16d4555af4c15956ee22d2e5ca7c02d5492083c6 Mon Sep 17 00:00:00 2001
From: Bodigrim <andrew.lelechenko@gmail.com>
Date: Mon, 4 Sep 2023 21:34:26 +0100
Subject: [PATCH] Improve error message for empty config file
Otherwise
```
$ CONFIG_FILE= cabal build
Error: cabal-3.10.1.0: Config file not found:
```
looks abrupt and confusing. Now it says
```
Error: cabal: Config file name is empty
```
---
cabal-install/src/Distribution/Client/Config.hs | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/cabal-install/src/Distribution/Client/Config.hs b/cabal-install/src/Distribution/Client/Config.hs
index 24c6c6a29f..13f94146c0 100644
--- a/cabal-install/src/Distribution/Client/Config.hs
+++ b/cabal-install/src/Distribution/Client/Config.hs
@@ -964,7 +964,9 @@ loadRawConfig verbosity configFileFlag = do
CommandlineOption -> failNoConfigFile
EnvironmentVariable -> failNoConfigFile
where
- msgNotFound = unwords ["Config file not found:", configFile]
+ msgNotFound
+ | null configFile = "Config file name is empty"
+ | otherwise = unwords ["Config file not found:", configFile]
failNoConfigFile =
die' verbosity $
unlines
--
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