[PATCH v2 4/5] git-mergetool--lib.sh: add error message for unknown tool variant

From: Philippe Blain via GitGitGadget <gitgitgadget@gmail.com>
Date: Nov 22, 2024, 19:50 UTC
Message-ID: <f234e965543322d96fd6aa41d12f0f52c3599206.1732305022.git.gitgitgadget@gmail.com>
In-Reply-To: <pull.1827.v2.git.1732305022.gitgitgadget@gmail.com>

From: Philippe Blain <levraiphilippeblain@gmail.com>

In setup_tool, we check if the given tool is a known variant of a tool, and quietly return with an error if not. This leads to the following invocation quietly failing:

	git mergetool --tool=vimdiff4

Add an error message before returning in this case.

Signed-off-by: Philippe Blain <levraiphilippeblain@gmail.com>
---
 git-mergetool--lib.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/git-mergetool--lib.sh b/git-mergetool--lib.sh
index d7e410d9481..11ea181259f 100644
--- a/git-mergetool--lib.sh
+++ b/git-mergetool--lib.sh
@@ -264,6 +264,7 @@ setup_tool () {
 
 	if ! list_tool_variants | grep -q "^$tool$"
 	then
+		echo "error: unknown tool variant '$tool'" >&2
 		return 1
 	fi

-- 
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