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In git-mergetool, the logic for getting which merge tool to use is duplicated in git-mergetool--lib, except for the fact that it needs to know whether the tool was guessed or not. Rewrite `get_merge_tool` to return whether or not the tool was guessed through the return code and make git-mergetool call this function instead of duplicating the logic. Note that 1 was chosen to be the return code of when a tool is guessed because it seems like a slightly more abnormal condition than getting a tool that's explicitly specified but this is completely arbitrary. Also, let `$GIT_MERGETOOL_GUI` be set to determine whether or not the guitool will be selected. This change is not completely backwards compatible as there may be external users of git-mergetool--lib. However, only one user, git-diffall[1], was found from searching GitHub and Google, and this tool is superseded by `git difftool --dir-diff` anyway. It seems very unlikely that there exists an external caller that would take into account the return code of `get_merge_tool` as it would always return 0 before this change so this change probably does not affect any external users. [1]: https://github.com/thenigan/git-diffall Signed-off-by: Denton Liu <liu.denton@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
50 lines
1.3 KiB
Plaintext
50 lines
1.3 KiB
Plaintext
git-mergetool{litdd}lib(1)
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==========================
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NAME
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----
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git-mergetool--lib - Common Git merge tool shell scriptlets
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SYNOPSIS
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--------
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[verse]
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'TOOL_MODE=(diff|merge) . "$(git --exec-path)/git-mergetool{litdd}lib"'
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DESCRIPTION
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-----------
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This is not a command the end user would want to run. Ever.
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This documentation is meant for people who are studying the
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Porcelain-ish scripts and/or are writing new ones.
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The 'git-mergetool{litdd}lib' scriptlet is designed to be sourced (using
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`.`) by other shell scripts to set up functions for working
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with Git merge tools.
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Before sourcing 'git-mergetool{litdd}lib', your script must set `TOOL_MODE`
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to define the operation mode for the functions listed below.
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'diff' and 'merge' are valid values.
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FUNCTIONS
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---------
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get_merge_tool::
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returns a merge tool. the return code is 1 if we returned a guessed
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merge tool, else 0. '$GIT_MERGETOOL_GUI' may be set to 'true' to
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search for the appropriate guitool.
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get_merge_tool_cmd::
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returns the custom command for a merge tool.
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get_merge_tool_path::
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returns the custom path for a merge tool.
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run_merge_tool::
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launches a merge tool given the tool name and a true/false
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flag to indicate whether a merge base is present.
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'$MERGED', '$LOCAL', '$REMOTE', and '$BASE' must be defined
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for use by the merge tool.
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GIT
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---
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Part of the linkgit:git[1] suite
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