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提交 b77b0278 编写于 作者: P Paul Mackerras
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gitk: Use git-diff-tree --cc for showing the diffs for merges 

This replaces a lot of code that used the result from several 2-way
diffs to generate a combined diff for a merge.  Now we just use
git-diff-tree --cc and colorize the output a bit, which is a lot
simpler, and has the enormous advantage that if the diff doesn't
show quite what someone thinks it should show, I can deflect the
blame to someone else. :)
Signed-off-by: NPaul Mackerras <paulus@samba.org>
上级 418c4c7b
隐藏空白更改
内联 并排
Showing with 99 addition and 501 deletion
gitk
浏览文件 @ b77b0278
......@@ -542,8 +542,19 @@ proc makewindow {rargs} {
$ctext tag conf m2 -fore green
$ctext tag conf m3 -fore purple
$ctext tag conf m4 -fore brown
$ctext tag conf m5 -fore "#009090"
$ctext tag conf m6 -fore magenta
$ctext tag conf m7 -fore "#808000"
$ctext tag conf m8 -fore "#009000"
$ctext tag conf m9 -fore "#ff0080"
$ctext tag conf m10 -fore cyan
$ctext tag conf m11 -fore "#b07070"
$ctext tag conf m12 -fore "#70b0f0"
$ctext tag conf m13 -fore "#70f0b0"
$ctext tag conf m14 -fore "#f0b070"
$ctext tag conf m15 -fore "#ff70b0"
$ctext tag conf mmax -fore darkgrey
set mergemax 5
set mergemax 16
$ctext tag conf mresult -font [concat $textfont bold]
$ctext tag conf msep -font [concat $textfont bold]
$ctext tag conf found -back yellow
......@@ -2182,6 +2193,7 @@ proc selectline {l isnew} {
global canvy0 linespc parents nparents children
global cflist currentid sha1entry
global commentend idtags idline linknum
global mergemax
$canv delete hover
normalline
......@@ -2265,11 +2277,26 @@ proc selectline {l isnew} {
}
set comment {}
if {[info exists parents($id)]} {
if {$nparents($id) > 1} {
set np 0
foreach p $parents($id) {
append comment "Parent: [commit_descriptor $p]\n"
if {$np >= $mergemax} {
set tag mmax
} else {
set tag m$np
}
$ctext insert end "Parent: " $tag
appendwithlinks [commit_descriptor $p]
incr np
}
} else {
if {[info exists parents($id)]} {
foreach p $parents($id) {
append comment "Parent: [commit_descriptor $p]\n"
}
}
}
if {[info exists children($id)]} {
foreach c $children($id) {
append comment "Child: [commit_descriptor $c]\n"
......@@ -2361,529 +2388,100 @@ proc goforw {} {
}
proc mergediff {id} {
global parents diffmergeid diffmergegca mergefilelist diffpindex
global parents diffmergeid diffopts mdifffd
global difffilestart
set diffmergeid $id
set diffpindex -1
set diffmergegca [findgca $parents($id)]
if {[info exists mergefilelist($id)]} {
if {$mergefilelist($id) ne {}} {
showmergediff
}
} else {
contmergediff {}
}
}
proc findgca {ids} {
set gca {}
foreach id $ids {
if {$gca eq {}} {
set gca $id
} else {
if {[catch {
set gca [exec git-merge-base $gca $id]
} err]} {
return {}
}
}
}
return $gca
}
proc contmergediff {ids} {
global diffmergeid diffpindex parents nparents diffmergegca
global treediffs mergefilelist diffids treepending
# diff the child against each of the parents, and diff
# each of the parents against the GCA.
while 1 {
if {[lindex $ids 1] == $diffmergeid && $diffmergegca ne {}} {
set ids [list $diffmergegca [lindex $ids 0]]
} else {
if {[incr diffpindex] >= $nparents($diffmergeid)} break
set p [lindex $parents($diffmergeid) $diffpindex]
set ids [list $p $diffmergeid]
}
if {![info exists treediffs($ids)]} {
set diffids $ids
if {![info exists treepending]} {
gettreediffs $ids
}
return
}
}
# If a file in some parent is different from the child and also
# different from the GCA, then it's interesting.
# If we don't have a GCA, then a file is interesting if it is
# different from the child in all the parents.
if {$diffmergegca ne {}} {
set files {}
foreach p $parents($diffmergeid) {
set gcadiffs $treediffs([list $diffmergegca $p])
foreach f $treediffs([list $p $diffmergeid]) {
if {[lsearch -exact $files $f] < 0
&& [lsearch -exact $gcadiffs $f] >= 0} {
lappend files $f
}
}
}
set files [lsort $files]
} else {
set p [lindex $parents($diffmergeid) 0]
set files $treediffs([list $diffmergeid $p])
for {set i 1} {$i < $nparents($diffmergeid) && $files ne {}} {incr i} {
set p [lindex $parents($diffmergeid) $i]
set df $treediffs([list $p $diffmergeid])
set nf {}
foreach f $files {
if {[lsearch -exact $df $f] >= 0} {
lappend nf $f
}
}
set files $nf
}
}
set mergefilelist($diffmergeid) $files
if {$files ne {}} {
showmergediff
}
}
proc showmergediff {} {
global cflist diffmergeid mergefilelist parents
global diffopts diffinhunk currentfile currenthunk filelines
global diffblocked groupfilelast mergefds groupfilenum grouphunks
set files $mergefilelist($diffmergeid)
foreach f $files {
$cflist insert end $f
}
catch {unset difffilestart}
# this doesn't seem to actually affect anything...
set env(GIT_DIFF_OPTS) $diffopts
set flist {}
catch {unset currentfile}
catch {unset currenthunk}
catch {unset filelines}
catch {unset groupfilenum}
catch {unset grouphunks}
set groupfilelast -1
foreach p $parents($diffmergeid) {
set cmd [list | git-diff-tree -p $p $diffmergeid]
set cmd [concat $cmd $mergefilelist($diffmergeid)]
if {[catch {set f [open $cmd r]} err]} {
error_popup "Error getting diffs: $err"
foreach f $flist {
catch {close $f}
}
return
}
lappend flist $f
set ids [list $diffmergeid $p]
set mergefds($ids) $f
set diffinhunk($ids) 0
set diffblocked($ids) 0
fconfigure $f -blocking 0
fileevent $f readable [list getmergediffline $f $ids $diffmergeid]
set cmd [concat | git-diff-tree --no-commit-id --cc $id]
if {[catch {set mdf [open $cmd r]} err]} {
error_popup "Error getting merge diffs: $err"
return
}
fconfigure $mdf -blocking 0
set mdifffd($id) $mdf
fileevent $mdf readable [list getmergediffline $mdf $id]
set nextupdate [expr {[clock clicks -milliseconds] + 100}]
}
proc getmergediffline {f ids id} {
global diffmergeid diffinhunk diffoldlines diffnewlines
global currentfile currenthunk
global diffoldstart diffnewstart diffoldlno diffnewlno
global diffblocked mergefilelist
global noldlines nnewlines difflcounts filelines
proc getmergediffline {mdf id} {
global diffmergeid ctext cflist nextupdate nparents mergemax
global difffilestart
set n [gets $f line]
set n [gets $mdf line]
if {$n < 0} {
if {![eof $f]} return
}
if {!([info exists diffmergeid] && $diffmergeid == $id)} {
if {$n < 0} {
close $f
if {[eof $mdf]} {
close $mdf
}
return
}
if {$diffinhunk($ids) != 0} {
set fi $currentfile($ids)
if {$n > 0 && [regexp {^[-+ \\]} $line match]} {
# continuing an existing hunk
set line [string range $line 1 end]
set p [lindex $ids 1]
if {$match eq "-" || $match eq " "} {
set filelines($p,$fi,$diffoldlno($ids)) $line
incr diffoldlno($ids)
}
if {$match eq "+" || $match eq " "} {
set filelines($id,$fi,$diffnewlno($ids)) $line
incr diffnewlno($ids)
}
if {$match eq " "} {
if {$diffinhunk($ids) == 2} {
lappend difflcounts($ids) \
[list $noldlines($ids) $nnewlines($ids)]
set noldlines($ids) 0
set diffinhunk($ids) 1
}
incr noldlines($ids)
} elseif {$match eq "-" || $match eq "+"} {
if {$diffinhunk($ids) == 1} {
lappend difflcounts($ids) [list $noldlines($ids)]
set noldlines($ids) 0
set nnewlines($ids) 0
set diffinhunk($ids) 2
}
if {$match eq "-"} {
incr noldlines($ids)
} else {
incr nnewlines($ids)
}
}
# and if it's \ No newline at end of line, then what?
return
}
# end of a hunk
if {$diffinhunk($ids) == 1 && $noldlines($ids) != 0} {
lappend difflcounts($ids) [list $noldlines($ids)]
} elseif {$diffinhunk($ids) == 2
&& ($noldlines($ids) != 0 || $nnewlines($ids) != 0)} {
lappend difflcounts($ids) [list $noldlines($ids) $nnewlines($ids)]
}
set currenthunk($ids) [list $currentfile($ids) \
$diffoldstart($ids) $diffnewstart($ids) \
$diffoldlno($ids) $diffnewlno($ids) \
$difflcounts($ids)]
set diffinhunk($ids) 0
# -1 = need to block, 0 = unblocked, 1 = is blocked
set diffblocked($ids) -1
processhunks
if {$diffblocked($ids) == -1} {
fileevent $f readable {}
set diffblocked($ids) 1
}
}
if {$n < 0} {
# eof
if {!$diffblocked($ids)} {
close $f
set currentfile($ids) [llength $mergefilelist($diffmergeid)]
set currenthunk($ids) [list $currentfile($ids) 0 0 0 0 {}]
processhunks
}
} elseif {[regexp {^diff --git a/(.*) b/} $line match fname]} {
# start of a new file
set currentfile($ids) \
[lsearch -exact $mergefilelist($diffmergeid) $fname]
} elseif {[regexp {^@@ -([0-9]+),([0-9]+) \+([0-9]+),([0-9]+) @@(.*)} \
$line match f1l f1c f2l f2c rest]} {
if {[info exists currentfile($ids)] && $currentfile($ids) >= 0} {
# start of a new hunk
if {$f1l == 0 && $f1c == 0} {
set f1l 1
}
if {$f2l == 0 && $f2c == 0} {
set f2l 1
}
set diffinhunk($ids) 1
set diffoldstart($ids) $f1l
set diffnewstart($ids) $f2l
set diffoldlno($ids) $f1l
set diffnewlno($ids) $f2l
set difflcounts($ids) {}
set noldlines($ids) 0
set nnewlines($ids) 0
}
}
}
proc processhunks {} {
global diffmergeid parents nparents currenthunk
global mergefilelist diffblocked mergefds
global grouphunks grouplinestart grouplineend groupfilenum
set nfiles [llength $mergefilelist($diffmergeid)]
while 1 {
set fi $nfiles
set lno 0
# look for the earliest hunk
foreach p $parents($diffmergeid) {
set ids [list $diffmergeid $p]
if {![info exists currenthunk($ids)]} return
set i [lindex $currenthunk($ids) 0]
set l [lindex $currenthunk($ids) 2]
if {$i < $fi || ($i == $fi && $l < $lno)} {
set fi $i
set lno $l
set pi $p
}
}
if {$fi < $nfiles} {
set ids [list $diffmergeid $pi]
set hunk $currenthunk($ids)
unset currenthunk($ids)
if {$diffblocked($ids) > 0} {
fileevent $mergefds($ids) readable \
[list getmergediffline $mergefds($ids) $ids $diffmergeid]
}
set diffblocked($ids) 0
if {[info exists groupfilenum] && $groupfilenum == $fi
&& $lno <= $grouplineend} {
# add this hunk to the pending group
lappend grouphunks($pi) $hunk
set endln [lindex $hunk 4]
if {$endln > $grouplineend} {
set grouplineend $endln
}
continue
}
}
# succeeding stuff doesn't belong in this group, so
# process the group now
if {[info exists groupfilenum]} {
processgroup
unset groupfilenum
unset grouphunks
}
if {$fi >= $nfiles} break
# start a new group
set groupfilenum $fi
set grouphunks($pi) [list $hunk]
set grouplinestart $lno
set grouplineend [lindex $hunk 4]
if {![info exists diffmergeid] || $id != $diffmergeid} {
return
}
}
proc processgroup {} {
global groupfilelast groupfilenum difffilestart
global mergefilelist diffmergeid ctext filelines
global parents diffmergeid diffoffset
global grouphunks grouplinestart grouplineend nparents
global mergemax
$ctext conf -state normal
set id $diffmergeid
set f $groupfilenum
if {$groupfilelast != $f} {
if {[regexp {^diff --cc (.*)} $line match fname]} {
# start of a new file
$ctext insert end "\n"
set here [$ctext index "end - 1c"]
set difffilestart($f) $here
set mark fmark.[expr {$f + 1}]
$ctext mark set $mark $here
$ctext mark gravity $mark left
set header [lindex $mergefilelist($id) $f]
set l [expr {(78 - [string length $header]) / 2}]
set i [$cflist index end]
$ctext mark set fmark.$i $here
$ctext mark gravity fmark.$i left
set difffilestart([expr {$i-1}]) $here
$cflist insert end $fname
set l [expr {(78 - [string length $fname]) / 2}]
set pad [string range "----------------------------------------" 1 $l]
$ctext insert end "$pad $header $pad\n" filesep
set groupfilelast $f
foreach p $parents($id) {
set diffoffset($p) 0
}
}
$ctext insert end "@@" msep
set nlines [expr {$grouplineend - $grouplinestart}]
set events {}
set pnum 0
foreach p $parents($id) {
set startline [expr {$grouplinestart + $diffoffset($p)}]
set ol $startline
set nl $grouplinestart
if {[info exists grouphunks($p)]} {
foreach h $grouphunks($p) {
set l [lindex $h 2]
if {$nl < $l} {
for {} {$nl < $l} {incr nl} {
set filelines($p,$f,$ol) $filelines($id,$f,$nl)
incr ol
}
}
foreach chunk [lindex $h 5] {
if {[llength $chunk] == 2} {
set olc [lindex $chunk 0]
set nlc [lindex $chunk 1]
set nnl [expr {$nl + $nlc}]
lappend events [list $nl $nnl $pnum $olc $nlc]
incr ol $olc
set nl $nnl
} else {
incr ol [lindex $chunk 0]
incr nl [lindex $chunk 0]
}
}
}
}
if {$nl < $grouplineend} {
for {} {$nl < $grouplineend} {incr nl} {
set filelines($p,$f,$ol) $filelines($id,$f,$nl)
incr ol
}
}
set nlines [expr {$ol - $startline}]
$ctext insert end " -$startline,$nlines" msep
incr pnum
}
set nlines [expr {$grouplineend - $grouplinestart}]
$ctext insert end " +$grouplinestart,$nlines @@\n" msep
set events [lsort -integer -index 0 $events]
set nevents [llength $events]
set nmerge $nparents($diffmergeid)
set l $grouplinestart
for {set i 0} {$i < $nevents} {set i $j} {
set nl [lindex $events $i 0]
while {$l < $nl} {
$ctext insert end " $filelines($id,$f,$l)\n"
incr l
}
set e [lindex $events $i]
set enl [lindex $e 1]
set j $i
set active {}
while 1 {
set pnum [lindex $e 2]
set olc [lindex $e 3]
set nlc [lindex $e 4]
if {![info exists delta($pnum)]} {
set delta($pnum) [expr {$olc - $nlc}]
lappend active $pnum
$ctext insert end "$pad $fname $pad\n" filesep
} elseif {[regexp {^@@} $line]} {
$ctext insert end "$line\n" hunksep
} elseif {[regexp {^[0-9a-f]{40}$} $line] || [regexp {^index} $line]} {
# do nothing
} else {
# parse the prefix - one ' ', '-' or '+' for each parent
set np $nparents($id)
set spaces {}
set minuses {}
set pluses {}
set isbad 0
for {set j 0} {$j < $np} {incr j} {
set c [string range $line $j $j]
if {$c == " "} {
lappend spaces $j
} elseif {$c == "-"} {
lappend minuses $j
} elseif {$c == "+"} {
lappend pluses $j
} else {
incr delta($pnum) [expr {$olc - $nlc}]
}
if {[incr j] >= $nevents} break
set e [lindex $events $j]
if {[lindex $e 0] >= $enl} break
if {[lindex $e 1] > $enl} {
set enl [lindex $e 1]
}
}
set nlc [expr {$enl - $l}]
set ncol mresult
set bestpn -1
if {[llength $active] == $nmerge - 1} {
# no diff for one of the parents, i.e. it's identical
for {set pnum 0} {$pnum < $nmerge} {incr pnum} {
if {![info exists delta($pnum)]} {
if {$pnum < $mergemax} {
lappend ncol m$pnum
} else {
lappend ncol mmax
}
break
}
}
} elseif {[llength $active] == $nmerge} {
# all parents are different, see if one is very similar
set bestsim 30
for {set pnum 0} {$pnum < $nmerge} {incr pnum} {
set sim [similarity $pnum $l $nlc $f \
[lrange $events $i [expr {$j-1}]]]
if {$sim > $bestsim} {
set bestsim $sim
set bestpn $pnum
}
}
if {$bestpn >= 0} {
lappend ncol m$bestpn
set isbad 1
break
}
}
set pnum -1
foreach p $parents($id) {
incr pnum
if {![info exists delta($pnum)] || $pnum == $bestpn} continue
set olc [expr {$nlc + $delta($pnum)}]
set ol [expr {$l + $diffoffset($p)}]
incr diffoffset($p) $delta($pnum)
unset delta($pnum)
for {} {$olc > 0} {incr olc -1} {
$ctext insert end "-$filelines($p,$f,$ol)\n" m$pnum
incr ol
}
set tags {}
set num {}
if {!$isbad && $minuses ne {} && $pluses eq {}} {
# line doesn't appear in result, parents in $minuses have the line
set num [lindex $minuses 0]
} elseif {!$isbad && $pluses ne {} && $minuses eq {}} {
# line appears in result, parents in $pluses don't have the line
lappend tags mresult
set num [lindex $spaces 0]
}
set endl [expr {$l + $nlc}]
if {$bestpn >= 0} {
# show this pretty much as a normal diff
set p [lindex $parents($id) $bestpn]
set ol [expr {$l + $diffoffset($p)}]
incr diffoffset($p) $delta($bestpn)
unset delta($bestpn)
for {set k $i} {$k < $j} {incr k} {
set e [lindex $events $k]
if {[lindex $e 2] != $bestpn} continue
set nl [lindex $e 0]
set ol [expr {$ol + $nl - $l}]
for {} {$l < $nl} {incr l} {
$ctext insert end "+$filelines($id,$f,$l)\n" $ncol
}
set c [lindex $e 3]
for {} {$c > 0} {incr c -1} {
$ctext insert end "-$filelines($p,$f,$ol)\n" m$bestpn
incr ol
}
set nl [lindex $e 1]
for {} {$l < $nl} {incr l} {
$ctext insert end "+$filelines($id,$f,$l)\n" mresult
}
if {$num ne {}} {
if {$num >= $mergemax} {
set num "max"
}
lappend tags m$num
}
for {} {$l < $endl} {incr l} {
$ctext insert end "+$filelines($id,$f,$l)\n" $ncol
}
}
while {$l < $grouplineend} {
$ctext insert end " $filelines($id,$f,$l)\n"
incr l
$ctext insert end "$line\n" $tags
}
$ctext conf -state disabled
}
proc similarity {pnum l nlc f events} {
global diffmergeid parents diffoffset filelines
set id $diffmergeid
set p [lindex $parents($id) $pnum]
set ol [expr {$l + $diffoffset($p)}]
set endl [expr {$l + $nlc}]
set same 0
set diff 0
foreach e $events {
if {[lindex $e 2] != $pnum} continue
set nl [lindex $e 0]
set ol [expr {$ol + $nl - $l}]
for {} {$l < $nl} {incr l} {
incr same [string length $filelines($id,$f,$l)]
incr same
}
set oc [lindex $e 3]
for {} {$oc > 0} {incr oc -1} {
incr diff [string length $filelines($p,$f,$ol)]
incr diff
incr ol
}
set nl [lindex $e 1]
for {} {$l < $nl} {incr l} {
incr diff [string length $filelines($id,$f,$l)]
incr diff
}
}
for {} {$l < $endl} {incr l} {
incr same [string length $filelines($id,$f,$l)]
incr same
}
if {$same == 0} {
return 0
if {[clock clicks -milliseconds] >= $nextupdate} {
incr nextupdate 100
fileevent $mdf readable {}
update
fileevent $mdf readable [list getmergediffline $mdf $id]
}
return [expr {200 * $same / (2 * $same + $diff)}]
}
proc startdiff {ids} {
......
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