lib/choose_repository.tcl

   1 # git-gui Git repository chooser
   2 # Copyright (C) 2007 Shawn Pearce
   3
   4 class choose_repository {
   5
   6 field top
   7 field w
   8 field w_body      ; # Widget holding the center content
   9 field w_next      ; # Next button
  10 field o_cons      ; # Console object (if active)
  11 field w_types     ; # List of type buttons in clone
  12
  13 field action          new ; # What action are we going to perform?
  14 field done              0 ; # Finished picking the repository?
  15 field local_path       {} ; # Where this repository is locally
  16 field origin_url       {} ; # Where we are cloning from
  17 field origin_name  origin ; # What we shall call 'origin'
  18 field clone_type hardlink ; # Type of clone to construct
  19 field readtree_err        ; # Error output from read-tree (if any)
  20
  21 constructor pick {} {
  22         global M1T M1B
  23
  24         make_toplevel top w
  25         wm title $top [mc "Git Gui"]
  26
  27         if {$top eq {.}} {
  28                 menu $w.mbar -tearoff 0
  29                 $top configure -menu $w.mbar
  30
  31                 $w.mbar add cascade \
  32                         -label [mc Repository] \
  33                         -menu $w.mbar.repository
  34                 menu $w.mbar.repository
  35                 $w.mbar.repository add command \
  36                         -label [mc Quit] \
  37                         -command exit \
  38                         -accelerator $M1T-Q
  39
  40                 if {[is_MacOSX]} {
  41                         $w.mbar add cascade -label [mc Apple] -menu .mbar.apple
  42                         menu $w.mbar.apple
  43                         $w.mbar.apple add command \
  44                                 -label [mc "About %s" [appname]] \
  45                                 -command do_about
  46                 } else {
  47                         $w.mbar add cascade -label [mc Help] -menu $w.mbar.help
  48                         menu $w.mbar.help
  49                         $w.mbar.help add command \
  50                                 -label [mc "About %s" [appname]] \
  51                                 -command do_about
  52                 }
  53
  54                 wm protocol $top WM_DELETE_WINDOW exit
  55                 bind $top <$M1B-q> exit
  56                 bind $top <$M1B-Q> exit
  57                 bind $top <Key-Escape> exit
  58         } else {
  59                 wm geometry $top "+[winfo rootx .]+[winfo rooty .]"
  60                 bind $top <Key-Escape> [list destroy $top]
  61         }
  62
  63         pack [git_logo $w.git_logo] -side left -fill y -padx 10 -pady 10
  64
  65         set w_body $w.body
  66         frame $w_body
  67         radiobutton $w_body.new \
  68                 -anchor w \
  69                 -text [mc "Create New Repository"] \
  70                 -variable @action \
  71                 -value new
  72         radiobutton $w_body.clone \
  73                 -anchor w \
  74                 -text [mc "Clone Existing Repository"] \
  75                 -variable @action \
  76                 -value clone
  77         radiobutton $w_body.open \
  78                 -anchor w \
  79                 -text [mc "Open Existing Repository"] \
  80                 -variable @action \
  81                 -value open
  82         pack $w_body.new -anchor w -fill x
  83         pack $w_body.clone -anchor w -fill x
  84         pack $w_body.open -anchor w -fill x
  85         pack $w_body -fill x -padx 10 -pady 10
  86
  87         frame $w.buttons
  88         set w_next $w.buttons.next
  89         button $w_next \
  90                 -default active \
  91                 -text [mc "Next >"] \
  92                 -command [cb _next]
  93         pack $w_next -side right -padx 5
  94         button $w.buttons.quit \
  95                 -text [mc "Quit"] \
  96                 -command exit
  97         pack $w.buttons.quit -side right -padx 5
  98         pack $w.buttons -side bottom -fill x -padx 10 -pady 10
  99
 100         bind $top <Return> [cb _invoke_next]
 101         bind $top <Visibility> "
 102                 [cb _center]
 103                 grab $top
 104                 focus $top
 105                 bind $top <Visibility> {}
 106         "
 107         wm deiconify $top
 108         tkwait variable @done
 109
 110         if {$top eq {.}} {
 111                 eval destroy [winfo children $top]
 112         }
 113 }
 114
 115 proc _home {} {
 116         if {[catch {set h $::env(HOME)}]
 117                 || ![file isdirectory $h]} {
 118                 set h .
 119         }
 120         return $h
 121 }
 122
 123 method _center {} {
 124         set nx [winfo reqwidth $top]
 125         set ny [winfo reqheight $top]
 126         set rx [expr {([winfo screenwidth  $top] - $nx) / 3}]
 127         set ry [expr {([winfo screenheight $top] - $ny) / 3}]
 128         wm geometry $top [format {+%d+%d} $rx $ry]
 129 }
 130
 131 method _invoke_next {} {
 132         if {[winfo exists $w_next]} {
 133                 uplevel #0 [$w_next cget -command]
 134         }
 135 }
 136
 137 method _next {} {
 138         destroy $w_body
 139         _do_$action $this
 140 }
 141
 142 method _write_local_path {args} {
 143         if {$local_path eq {}} {
 144                 $w_next conf -state disabled
 145         } else {
 146                 $w_next conf -state normal
 147         }
 148 }
 149
 150 method _git_init {} {
 151         if {[file exists $local_path]} {
 152                 error_popup [mc "Location %s already exists." $local_path]
 153                 return 0
 154         }
 155
 156         if {[catch {file mkdir $local_path} err]} {
 157                 error_popup [strcat \
 158                         [mc "Failed to create repository %s:" $local_path] \
 159                         "\n\n$err"]
 160                 return 0
 161         }
 162
 163         if {[catch {cd $local_path} err]} {
 164                 error_popup [strcat \
 165                         [mc "Failed to create repository %s:" $local_path] \
 166                         "\n\n$err"]
 167                 return 0
 168         }
 169
 170         if {[catch {git init} err]} {
 171                 error_popup [strcat \
 172                         [mc "Failed to create repository %s:" $local_path] \
 173                         "\n\n$err"]
 174                 return 0
 175         }
 176
 177         set ::_gitdir .git
 178         set ::_prefix {}
 179         return 1
 180 }
 181
 182 proc _is_git {path} {
 183         if {[file exists [file join $path HEAD]]
 184          && [file exists [file join $path objects]]
 185          && [file exists [file join $path config]]} {
 186                 return 1
 187         }
 188         return 0
 189 }
 190
 191 ######################################################################
 192 ##
 193 ## Create New Repository
 194
 195 method _do_new {} {
 196         $w_next conf \
 197                 -state disabled \
 198                 -command [cb _do_new2] \
 199                 -text [mc "Create"]
 200
 201         frame $w_body
 202         label $w_body.h \
 203                 -font font_uibold \
 204                 -text [mc "Create New Repository"]
 205         pack $w_body.h -side top -fill x -pady 10
 206         pack $w_body -fill x -padx 10
 207
 208         frame $w_body.where
 209         label $w_body.where.l -text [mc "Directory:"]
 210         entry $w_body.where.t \
 211                 -textvariable @local_path \
 212                 -font font_diff \
 213                 -width 50
 214         button $w_body.where.b \
 215                 -text [mc "Browse"] \
 216                 -command [cb _new_local_path]
 217
 218         pack $w_body.where.b -side right
 219         pack $w_body.where.l -side left
 220         pack $w_body.where.t -fill x
 221         pack $w_body.where -fill x
 222
 223         trace add variable @local_path write [cb _write_local_path]
 224         update
 225         focus $w_body.where.t
 226 }
 227
 228 method _new_local_path {} {
 229         if {$local_path ne {}} {
 230                 set p [file dirname $local_path]
 231         } else {
 232                 set p [_home]
 233         }
 234
 235         set p [tk_chooseDirectory \
 236                 -initialdir $p \
 237                 -parent $top \
 238                 -title [mc "Git Repository"] \
 239                 -mustexist false]
 240         if {$p eq {}} return
 241
 242         set p [file normalize $p]
 243         if {[file isdirectory $p]} {
 244                 foreach i [glob \
 245                         -directory $p \
 246                         -tails \
 247                         -nocomplain \
 248                         * .*] {
 249                         switch -- $i {
 250                          . continue
 251                         .. continue
 252                         default {
 253                                 error_popup [mc "Directory %s already exists." $p]
 254                                 return
 255                         }
 256                         }
 257                 }
 258                 if {[catch {file delete $p} err]} {
 259                         error_popup [strcat \
 260                                 [mc "Directory %s already exists." $p] \
 261                                 "\n\n$err"]
 262                         return
 263                 }
 264         } elseif {[file exists $p]} {
 265                 error_popup [mc "File %s already exists." $p]
 266                 return
 267         }
 268         set local_path $p
 269 }
 270
 271 method _do_new2 {} {
 272         if {![_git_init $this]} {
 273                 return
 274         }
 275         set done 1
 276 }
 277
 278 ######################################################################
 279 ##
 280 ## Clone Existing Repository
 281
 282 method _do_clone {} {
 283         $w_next conf \
 284                 -state disabled \
 285                 -command [cb _do_clone2] \
 286                 -text [mc "Clone"]
 287
 288         frame $w_body
 289         label $w_body.h \
 290                 -font font_uibold \
 291                 -text [mc "Clone Existing Repository"]
 292         pack $w_body.h -side top -fill x -pady 10
 293         pack $w_body -fill x -padx 10
 294
 295         set args $w_body.args
 296         frame $w_body.args
 297         pack $args -fill both
 298
 299         label $args.origin_l -text [mc "URL:"]
 300         entry $args.origin_t \
 301                 -textvariable @origin_url \
 302                 -font font_diff \
 303                 -width 50
 304         button $args.origin_b \
 305                 -text [mc "Browse"] \
 306                 -command [cb _open_origin]
 307         grid $args.origin_l $args.origin_t $args.origin_b -sticky ew
 308
 309         label $args.where_l -text [mc "Directory:"]
 310         entry $args.where_t \
 311                 -textvariable @local_path \
 312                 -font font_diff \
 313                 -width 50
 314         button $args.where_b \
 315                 -text [mc "Browse"] \
 316                 -command [cb _new_local_path]
 317         grid $args.where_l $args.where_t $args.where_b -sticky ew
 318
 319         label $args.type_l -text [mc "Clone Type:"]
 320         frame $args.type_f
 321         set w_types [list]
 322         lappend w_types [radiobutton $args.type_f.hardlink \
 323                 -state disabled \
 324                 -anchor w \
 325                 -text [mc "Standard (Fast, Semi-Redundant, Hardlinks)"] \
 326                 -variable @clone_type \
 327                 -value hardlink]
 328         lappend w_types [radiobutton $args.type_f.full \
 329                 -state disabled \
 330                 -anchor w \
 331                 -text [mc "Full Copy (Slower, Redundant Backup)"] \
 332                 -variable @clone_type \
 333                 -value full]
 334         lappend w_types [radiobutton $args.type_f.shared \
 335                 -state disabled \
 336                 -anchor w \
 337                 -text [mc "Shared (Fastest, Not Recommended, No Backup)"] \
 338                 -variable @clone_type \
 339                 -value shared]
 340         foreach r $w_types {
 341                 pack $r -anchor w
 342         }
 343         grid $args.type_l $args.type_f -sticky new
 344
 345         grid columnconfigure $args 1 -weight 1
 346
 347         trace add variable @local_path write [cb _update_clone]
 348         trace add variable @origin_url write [cb _update_clone]
 349         update
 350         focus $args.origin_t
 351 }
 352
 353 method _open_origin {} {
 354         if {$origin_url ne {} && [file isdirectory $origin_url]} {
 355                 set p $origin_url
 356         } else {
 357                 set p [_home]
 358         }
 359
 360         set p [tk_chooseDirectory \
 361                 -initialdir $p \
 362                 -parent $top \
 363                 -title [mc "Git Repository"] \
 364                 -mustexist true]
 365         if {$p eq {}} return
 366
 367         set p [file normalize $p]
 368         if {![_is_git [file join $p .git]] && ![_is_git $p]} {
 369                 error_popup [mc "Not a Git repository: %s" [file tail $p]]
 370                 return
 371         }
 372         set origin_url $p
 373 }
 374
 375 method _update_clone {args} {
 376         if {$local_path ne {} && $origin_url ne {}} {
 377                 $w_next conf -state normal
 378         } else {
 379                 $w_next conf -state disabled
 380         }
 381
 382         if {$origin_url ne {} &&
 383                 (  [_is_git [file join $origin_url .git]]
 384                 || [_is_git $origin_url])} {
 385                 set e normal
 386                 if {[[lindex $w_types 0] cget -state] eq {disabled}} {
 387                         set clone_type hardlink
 388                 }
 389         } else {
 390                 set e disabled
 391                 set clone_type full
 392         }
 393
 394         foreach r $w_types {
 395                 $r conf -state $e
 396         }
 397 }
 398
 399 method _do_clone2 {} {
 400         if {[file isdirectory $origin_url]} {
 401                 set origin_url [file normalize $origin_url]
 402         }
 403
 404         if {$clone_type eq {hardlink} && ![file isdirectory $origin_url]} {
 405                 error_popup [mc "Standard only available for local repository."]
 406                 return
 407         }
 408         if {$clone_type eq {shared} && ![file isdirectory $origin_url]} {
 409                 error_popup [mc "Shared only available for local repository."]
 410                 return
 411         }
 412
 413         if {$clone_type eq {hardlink} || $clone_type eq {shared}} {
 414                 set objdir [file join $origin_url .git objects]
 415                 if {![file isdirectory $objdir]} {
 416                         set objdir [file join $origin_url objects]
 417                         if {![file isdirectory $objdir]} {
 418                                 error_popup [mc "Not a Git repository: %s" [file tail $origin_url]]
 419                                 return
 420                         }
 421                 }
 422         }
 423
 424         set giturl $origin_url
 425         if {[is_Cygwin] && [file isdirectory $giturl]} {
 426                 set giturl [exec cygpath --unix --absolute $giturl]
 427                 if {$clone_type eq {shared}} {
 428                         set objdir [exec cygpath --unix --absolute $objdir]
 429                 }
 430         }
 431
 432         if {![_git_init $this]} return
 433         set local_path [pwd]
 434
 435         if {[catch {
 436                         git config remote.$origin_name.url $giturl
 437                         git config remote.$origin_name.fetch +refs/heads/*:refs/remotes/$origin_name/*
 438                 } err]} {
 439                 error_popup [strcat [mc "Failed to configure origin"] "\n\n$err"]
 440                 return
 441         }
 442
 443         destroy $w_body $w_next
 444
 445         switch -exact -- $clone_type {
 446         hardlink {
 447                 set o_cons [status_bar::two_line $w_body]
 448                 pack $w_body -fill x -padx 10 -pady 10
 449
 450                 $o_cons start \
 451                         [mc "Counting objects"] \
 452                         [mc "buckets"]
 453                 update
 454
 455                 if {[file exists [file join $objdir info alternates]]} {
 456                         set pwd [pwd]
 457                         if {[catch {
 458                                 file mkdir [gitdir objects info]
 459                                 set f_in [open [file join $objdir info alternates] r]
 460                                 set f_cp [open [gitdir objects info alternates] w]
 461                                 fconfigure $f_in -translation binary -encoding binary
 462                                 fconfigure $f_cp -translation binary -encoding binary
 463                                 cd $objdir
 464                                 while {[gets $f_in line] >= 0} {
 465                                         if {[is_Cygwin]} {
 466                                                 puts $f_cp [exec cygpath --unix --absolute $line]
 467                                         } else {
 468                                                 puts $f_cp [file normalize $line]
 469                                         }
 470                                 }
 471                                 close $f_in
 472                                 close $f_cp
 473                                 cd $pwd
 474                         } err]} {
 475                                 catch {cd $pwd}
 476                                 _clone_failed $this [mc "Unable to copy objects/info/alternates: %s" $err]
 477                                 return
 478                         }
 479                 }
 480
 481                 set tolink  [list]
 482                 set buckets [glob \
 483                         -tails \
 484                         -nocomplain \
 485                         -directory [file join $objdir] ??]
 486                 set bcnt [expr {[llength $buckets] + 2}]
 487                 set bcur 1
 488                 $o_cons update $bcur $bcnt
 489                 update
 490
 491                 file mkdir [file join .git objects pack]
 492                 foreach i [glob -tails -nocomplain \
 493                         -directory [file join $objdir pack] *] {
 494                         lappend tolink [file join pack $i]
 495                 }
 496                 $o_cons update [incr bcur] $bcnt
 497                 update
 498
 499                 foreach i $buckets {
 500                         file mkdir [file join .git objects $i]
 501                         foreach j [glob -tails -nocomplain \
 502                                 -directory [file join $objdir $i] *] {
 503                                 lappend tolink [file join $i $j]
 504                         }
 505                         $o_cons update [incr bcur] $bcnt
 506                         update
 507                 }
 508                 $o_cons stop
 509
 510                 if {$tolink eq {}} {
 511                         info_popup [strcat \
 512                                 [mc "Nothing to clone from %s." $origin_url] \
 513                                 "\n" \
 514                                 [mc "The 'master' branch has not been initialized."] \
 515                                 ]
 516                         destroy $w_body
 517                         set done 1
 518                         return
 519                 }
 520
 521                 set i [lindex $tolink 0]
 522                 if {[catch {
 523                                 file link -hard \
 524                                         [file join .git objects $i] \
 525                                         [file join $objdir $i]
 526                         } err]} {
 527                         info_popup [mc "Hardlinks are unavailable.  Falling back to copying."]
 528                         set i [_copy_files $this $objdir $tolink]
 529                 } else {
 530                         set i [_link_files $this $objdir [lrange $tolink 1 end]]
 531                 }
 532                 if {!$i} return
 533
 534                 destroy $w_body
 535         }
 536         full {
 537                 set o_cons [console::embed \
 538                         $w_body \
 539                         [mc "Cloning from %s" $origin_url]]
 540                 pack $w_body -fill both -expand 1 -padx 10
 541                 $o_cons exec \
 542                         [list git fetch --no-tags -k $origin_name] \
 543                         [cb _do_clone_tags]
 544         }
 545         shared {
 546                 set fd [open [gitdir objects info alternates] w]
 547                 fconfigure $fd -translation binary
 548                 puts $fd $objdir
 549                 close $fd
 550         }
 551         }
 552
 553         if {$clone_type eq {hardlink} || $clone_type eq {shared}} {
 554                 if {![_clone_refs $this]} return
 555                 set pwd [pwd]
 556                 if {[catch {
 557                                 cd $origin_url
 558                                 set HEAD [git rev-parse --verify HEAD^0]
 559                         } err]} {
 560                         _clone_failed $this [mc "Not a Git repository: %s" [file tail $origin_url]]
 561                         return 0
 562                 }
 563                 cd $pwd
 564                 _do_clone_checkout $this $HEAD
 565         }
 566 }
 567
 568 method _copy_files {objdir tocopy} {
 569         $o_cons start \
 570                 [mc "Copying objects"] \
 571                 [mc "KiB"]
 572         set tot 0
 573         set cmp 0
 574         foreach p $tocopy {
 575                 incr tot [file size [file join $objdir $p]]
 576         }
 577         foreach p $tocopy {
 578                 if {[catch {
 579                                 set f_in [open [file join $objdir $p] r]
 580                                 set f_cp [open [file join .git objects $p] w]
 581                                 fconfigure $f_in -translation binary -encoding binary
 582                                 fconfigure $f_cp -translation binary -encoding binary
 583
 584                                 while {![eof $f_in]} {
 585                                         incr cmp [fcopy $f_in $f_cp -size 16384]
 586                                         $o_cons update \
 587                                                 [expr {$cmp / 1024}] \
 588                                                 [expr {$tot / 1024}]
 589                                         update
 590                                 }
 591
 592                                 close $f_in
 593                                 close $f_cp
 594                         } err]} {
 595                         _clone_failed $this [mc "Unable to copy object: %s" $err]
 596                         return 0
 597                 }
 598         }
 599         return 1
 600 }
 601
 602 method _link_files {objdir tolink} {
 603         set total [llength $tolink]
 604         $o_cons start \
 605                 [mc "Linking objects"] \
 606                 [mc "objects"]
 607         for {set i 0} {$i < $total} {} {
 608                 set p [lindex $tolink $i]
 609                 if {[catch {
 610                                 file link -hard \
 611                                         [file join .git objects $p] \
 612                                         [file join $objdir $p]
 613                         } err]} {
 614                         _clone_failed $this [mc "Unable to hardlink object: %s" $err]
 615                         return 0
 616                 }
 617
 618                 incr i
 619                 if {$i % 5 == 0} {
 620                         $o_cons update $i $total
 621                         update
 622                 }
 623         }
 624         return 1
 625 }
 626
 627 method _clone_refs {} {
 628         set pwd [pwd]
 629         if {[catch {cd $origin_url} err]} {
 630                 error_popup [mc "Not a Git repository: %s" [file tail $origin_url]]
 631                 return 0
 632         }
 633         set fd_in [git_read for-each-ref \
 634                 --tcl \
 635                 {--format=list %(refname) %(objectname) %(*objectname)}]
 636         cd $pwd
 637
 638         set fd [open [gitdir packed-refs] w]
 639         fconfigure $fd -translation binary
 640         puts $fd "# pack-refs with: peeled"
 641         while {[gets $fd_in line] >= 0} {
 642                 set line [eval $line]
 643                 set refn [lindex $line 0]
 644                 set robj [lindex $line 1]
 645                 set tobj [lindex $line 2]
 646
 647                 if {[regsub ^refs/heads/ $refn \
 648                         "refs/remotes/$origin_name/" refn]} {
 649                         puts $fd "$robj $refn"
 650                 } elseif {[string match refs/tags/* $refn]} {
 651                         puts $fd "$robj $refn"
 652                         if {$tobj ne {}} {
 653                                 puts $fd "^$tobj"
 654                         }
 655                 }
 656         }
 657         close $fd_in
 658         close $fd
 659         return 1
 660 }
 661
 662 method _do_clone_tags {ok} {
 663         if {$ok} {
 664                 $o_cons exec \
 665                         [list git fetch --tags -k $origin_name] \
 666                         [cb _do_clone_HEAD]
 667         } else {
 668                 $o_cons done $ok
 669                 _clone_failed $this [mc "Cannot fetch branches and objects.  See console output for details."]
 670         }
 671 }
 672
 673 method _do_clone_HEAD {ok} {
 674         if {$ok} {
 675                 $o_cons exec \
 676                         [list git fetch $origin_name HEAD] \
 677                         [cb _do_clone_full_end]
 678         } else {
 679                 $o_cons done $ok
 680                 _clone_failed $this [mc "Cannot fetch tags.  See console output for details."]
 681         }
 682 }
 683
 684 method _do_clone_full_end {ok} {
 685         $o_cons done $ok
 686
 687         if {$ok} {
 688                 destroy $w_body
 689
 690                 set HEAD {}
 691                 if {[file exists [gitdir FETCH_HEAD]]} {
 692                         set fd [open [gitdir FETCH_HEAD] r]
 693                         while {[gets $fd line] >= 0} {
 694                                 if {[regexp "^(.{40})\t\t" $line line HEAD]} {
 695                                         break
 696                                 }
 697                         }
 698                         close $fd
 699                 }
 700
 701                 catch {git pack-refs}
 702                 _do_clone_checkout $this $HEAD
 703         } else {
 704                 _clone_failed $this [mc "Cannot determine HEAD.  See console output for details."]
 705         }
 706 }
 707
 708 method _clone_failed {{why {}}} {
 709         if {[catch {file delete -force $local_path} err]} {
 710                 set why [strcat \
 711                         $why \
 712                         "\n\n" \
 713                         [mc "Unable to cleanup %s" $local_path] \
 714                         "\n\n" \
 715                         $err]
 716         }
 717         if {$why ne {}} {
 718                 update
 719                 error_popup [strcat [mc "Clone failed."] "\n" $why]
 720         }
 721 }
 722
 723 method _do_clone_checkout {HEAD} {
 724         if {$HEAD eq {}} {
 725                 info_popup [strcat \
 726                         [mc "No default branch obtained."] \
 727                         "\n" \
 728                         [mc "The 'master' branch has not been initialized."] \
 729                         ]
 730                 set done 1
 731                 return
 732         }
 733         if {[catch {
 734                         git update-ref HEAD $HEAD^0
 735                 } err]} {
 736                 info_popup [strcat \
 737                         [mc "Cannot resolve %s as a commit." $HEAD^0] \
 738                         "\n  $err" \
 739                         "\n" \
 740                         [mc "The 'master' branch has not been initialized."] \
 741                         ]
 742                 set done 1
 743                 return
 744         }
 745
 746         set o_cons [status_bar::two_line $w_body]
 747         pack $w_body -fill x -padx 10 -pady 10
 748         $o_cons start \
 749                 [mc "Creating working directory"] \
 750                 [mc "files"]
 751
 752         set readtree_err {}
 753         set fd [git_read --stderr read-tree \
 754                 -m \
 755                 -u \
 756                 -v \
 757                 HEAD \
 758                 HEAD \
 759                 ]
 760         fconfigure $fd -blocking 0 -translation binary
 761         fileevent $fd readable [cb _readtree_wait $fd]
 762 }
 763
 764 method _readtree_wait {fd} {
 765         set buf [read $fd]
 766         $o_cons update_meter $buf
 767         append readtree_err $buf
 768
 769         fconfigure $fd -blocking 1
 770         if {![eof $fd]} {
 771                 fconfigure $fd -blocking 0
 772                 return
 773         }
 774
 775         if {[catch {close $fd}]} {
 776                 set err $readtree_err
 777                 regsub {^fatal: } $err {} err
 778                 error_popup [strcat \
 779                         [mc "Initial file checkout failed."] \
 780                         "\n\n$err"]
 781                 return
 782         }
 783
 784         set done 1
 785 }
 786
 787 ######################################################################
 788 ##
 789 ## Open Existing Repository
 790
 791 method _do_open {} {
 792         $w_next conf \
 793                 -state disabled \
 794                 -command [cb _do_open2] \
 795                 -text [mc "Open"]
 796
 797         frame $w_body
 798         label $w_body.h \
 799                 -font font_uibold \
 800                 -text [mc "Open Existing Repository"]
 801         pack $w_body.h -side top -fill x -pady 10
 802         pack $w_body -fill x -padx 10
 803
 804         frame $w_body.where
 805         label $w_body.where.l -text [mc "Repository:"]
 806         entry $w_body.where.t \
 807                 -textvariable @local_path \
 808                 -font font_diff \
 809                 -width 50
 810         button $w_body.where.b \
 811                 -text [mc "Browse"] \
 812                 -command [cb _open_local_path]
 813
 814         pack $w_body.where.b -side right
 815         pack $w_body.where.l -side left
 816         pack $w_body.where.t -fill x
 817         pack $w_body.where -fill x
 818
 819         trace add variable @local_path write [cb _write_local_path]
 820         update
 821         focus $w_body.where.t
 822 }
 823
 824 method _open_local_path {} {
 825         if {$local_path ne {}} {
 826                 set p $local_path
 827         } else {
 828                 set p [_home]
 829         }
 830
 831         set p [tk_chooseDirectory \
 832                 -initialdir $p \
 833                 -parent $top \
 834                 -title [mc "Git Repository"] \
 835                 -mustexist true]
 836         if {$p eq {}} return
 837
 838         set p [file normalize $p]
 839         if {![_is_git [file join $p .git]]} {
 840                 error_popup [mc "Not a Git repository: %s" [file tail $p]]
 841                 return
 842         }
 843         set local_path $p
 844 }
 845
 846 method _do_open2 {} {
 847         if {![_is_git [file join $local_path .git]]} {
 848                 error_popup [mc "Not a Git repository: %s" [file tail $local_path]]
 849                 return
 850         }
 851
 852         if {[catch {cd $local_path} err]} {
 853                 error_popup [strcat \
 854                         [mc "Failed to open repository %s:" $local_path] \
 855                         "\n\n$err"]
 856                 return
 857         }
 858
 859         set ::_gitdir .git
 860         set ::_prefix {}
 861         set done 1
 862 }
 863
 864 }