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2020-03-17git-gui: create a new namespace for chord script evaluationLibravatar Pratyush Yadav1-2/+4
Evaluating the script in the same namespace as the chord itself creates potential for variable name collision. And in that case the script would unknowingly use the chord's variables. For example, say the script has a variable called 'is_completed', which also exists in the chord's namespace. The script then calls 'eval' and sets 'is_completed' to 1 thinking it is setting its own variable, completely unaware of how the chord works behind the scenes. This leads to the chord never actually executing because it sees 'is_completed' as true and thinks it has already completed. Avoid the potential collision by creating a separate namespace for the script that is a child of the chord's namespace. Signed-off-by: Pratyush Yadav <me@yadavpratyush.com>
2020-03-17git-gui: reduce Tcl version requirement from 8.6 to 8.5Libravatar Pratyush Yadav1-29/+25
On some MacOS distributions like High Sierra, Tcl 8.5 is shipped by default. This makes git-gui error out at startup because of the version mismatch. The only part that requires Tcl 8.6 is SimpleChord, which depends on TclOO. So, don't use it and use our homegrown class.tcl instead. This means some slight syntax changes. Since class.tcl doesn't have an "unknown" method like TclOO does, we can't just call '$note', but have to use '$note activate' instead. The constructor now needs a proper namespace qualifier. Update the documentation to reflect the new syntax. As of now, the only part of git-gui that needs Tcl 8.5 is a call to 'apply' in lib/index.tcl::lambda. Keep using it until someone shows up shouting that their OS ships with 8.4 only. Then we would have to look into implementing it in pure Tcl. Signed-off-by: Pratyush Yadav <me@yadavpratyush.com>
2019-12-06git-gui: revert untracked files by deleting themLibravatar Jonathan Gilbert1-0/+160
Update the revert_helper proc to check for untracked files as well as changes, and then handle changes to be reverted and untracked files with independent blocks of code. Prompt the user independently for untracked files, since the underlying action is fundamentally different (rm -f). If after deleting untracked files, the directory containing them becomes empty, then remove the directory as well. Migrate unlocking of the index out of _close_updateindex to a responsibility of the caller, to permit paths that don't directly unlock the index, and refactor the error handling added in d4e890e5 so that callers can make flow control decisions in the event of errors. Update Tcl/Tk dependency from 8.4 to 8.6 in git-gui.sh. A new proc delete_files takes care of actually deleting the files in batches, using the Tcler's Wiki recommended approach for keeping the UI responsive. Since the checkout_index and delete_files calls are both asynchronous and could potentially complete in any order, a "chord" is used to coordinate unlocking the index and returning the UI to a usable state only after both operations are complete. The `SimpleChord` class, based on TclOO (Tcl/Tk 8.6), is added in this commit. Signed-off-by: Jonathan Gilbert <JonathanG@iQmetrix.com> Signed-off-by: Pratyush Yadav <me@yadavpratyush.com>