We cannot rely on the output of `meld --help` when determining
whether or not meld understands the --output option.
Newer versions of meld print a generic help message that does not
mention --output even though it is supported.
Add a mergetool.meld.compat variable to enable the historical
behavior and make the --output mode the default.
Reported-by: Andrey Novoseltsev <novos...@gmail.com>
Signed-off-by: David Aguilar <dav...@gmail.com>
---
Documentation/config.txt | 7 +++++++
mergetools/meld | 4 ++--
2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/Documentation/config.txt b/Documentation/config.txt
index 04a1e2f..a942bfe 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -1755,6 +1755,13 @@ mergetool.<tool>.trustExitCode::
if the file has been updated, otherwise the user is prompted to
indicate the success of the merge.
+mergetool.meld.compat::
+ Git passes the `--output` option to `meld` by default when
+ using the `meld` merge tool. Older versions of `meld` do not
+ understand the `--output` option. Set `mergetool.meld.compat`
+ to `true` if your version of `meld` is older and does not
+ understand the `--output` option. Defaults to false.
+
mergetool.keepBackup::
After performing a merge, the original file with conflict markers
can be saved as a file with a `.orig` extension. If this variable
diff --git a/mergetools/meld b/mergetools/meld
index cb672a5..9e2b8d2 100644
--- a/mergetools/meld
+++ b/mergetools/meld
@@ -18,12 +18,12 @@ merge_cmd () {
check_unchanged
}
-# Check whether 'meld --output <file>' is supported
+# Use 'meld --output <file>' unless mergetool.meld.compat is true.
check_meld_for_output_version () {
meld_path="$(git config mergetool.meld.path)"
meld_path="${meld_path:-meld}"
- if "$meld_path" --help 2>&1 | grep -e --output >/dev/null
+ if test "$(git config --bool mergetool.meld.compat)" != true
then
meld_has_output_option=true
else
--
2.1.2.453.g1b015e3
--
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