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gitk: added external diff file rename detection #1774

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gitk: added external diff file rename detection #1774

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33 changes: 31 additions & 2 deletions gitk-git/gitk
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Original file line number Diff line number Diff line change
Expand Up @@ -3666,6 +3666,27 @@ proc external_diff_get_one_file {diffid filename diffdir} {
"revision $diffid"]
}

proc check_for_renames_in_diff {filepath} {
global ctext

set renamed_filenames [list {}]
set filename [file tail $filepath]
set rename_from_text_identifier_length 12
set rename_to_text_identifier_length 10
set reg_expr_rename_from {^rename from (.*$filename)}
set reg_expr_rename_from [subst -nobackslashes -nocommands $reg_expr_rename_from]
set reg_expr_rename_to {^rename to (.*)}
set rename_from_text_index [$ctext search -elide -regexp -- $reg_expr_rename_from 0.0]
if { ($rename_from_text_index != {})} {
set rename_to_text_index [$ctext search -elide -regexp -- $reg_expr_rename_to $rename_from_text_index]
if { ($rename_from_text_index != {}) && ($rename_to_text_index != {}) } {
lappend renamed_filenames [$ctext get "$rename_from_text_index + $rename_from_text_identifier_length chars" "$rename_from_text_index lineend"]
lappend renamed_filenames [$ctext get "$rename_to_text_index + $rename_to_text_identifier_length chars" "$rename_to_text_index lineend"]
}
}
return $renamed_filenames
}

proc external_diff {} {
global nullid nullid2
global flist_menu_file
Expand Down Expand Up @@ -3696,8 +3717,16 @@ proc external_diff {} {
if {$diffdir eq {}} return

# gather files to diff
set difffromfile [external_diff_get_one_file $diffidfrom $flist_menu_file $diffdir]
set difftofile [external_diff_get_one_file $diffidto $flist_menu_file $diffdir]
set renamed_filenames [check_for_renames_in_diff $flist_menu_file]
set rename_from_filename [lindex $renamed_filenames 1]
set rename_to_filename [lindex $renamed_filenames 2]
if { ($rename_from_filename != {}) && ($rename_to_filename != {}) } {
set difffromfile [external_diff_get_one_file $diffidfrom $rename_from_filename $diffdir]
set difftofile [external_diff_get_one_file $diffidto $rename_to_filename $diffdir]
} else {
set difffromfile [external_diff_get_one_file $diffidfrom $flist_menu_file $diffdir]
set difftofile [external_diff_get_one_file $diffidto $flist_menu_file $diffdir]
}

if {$difffromfile ne {} && $difftofile ne {}} {
set cmd [list [shellsplit $extdifftool] $difffromfile $difftofile]
Expand Down
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