diff options
Diffstat (limited to '')
| -rwxr-xr-x | git-gui.sh | 207 |
1 files changed, 133 insertions, 74 deletions
diff --git a/git-gui.sh b/git-gui.sh index 201524c34e..cb92bba1c4 100755 --- a/git-gui.sh +++ b/git-gui.sh @@ -46,6 +46,139 @@ catch {rename send {}} ; # What an evil concept... ###################################################################### ## +## Enabling platform-specific code paths + +proc is_MacOSX {} { + if {[tk windowingsystem] eq {aqua}} { + return 1 + } + return 0 +} + +proc is_Windows {} { + if {$::tcl_platform(platform) eq {windows}} { + return 1 + } + return 0 +} + +set _iscygwin {} +proc is_Cygwin {} { + global _iscygwin + if {$_iscygwin eq {}} { + if {[string match "CYGWIN_*" $::tcl_platform(os)]} { + set _iscygwin 1 + } else { + set _iscygwin 0 + } + } + return $_iscygwin +} + +###################################################################### +## +## PATH lookup + +set _search_path {} +proc _which {what args} { + global env _search_exe _search_path + + if {$_search_path eq {}} { + if {[is_Cygwin] && [regexp {^(/|\.:)} $env(PATH)]} { + set _search_path [split [exec cygpath \ + --windows \ + --path \ + --absolute \ + $env(PATH)] {;}] + set _search_exe .exe + } elseif {[is_Windows]} { + set gitguidir [file dirname [info script]] + regsub -all ";" $gitguidir "\\;" gitguidir + set env(PATH) "$gitguidir;$env(PATH)" + set _search_path [split $env(PATH) {;}] + # Skip empty `PATH` elements + set _search_path [lsearch -all -inline -not -exact \ + $_search_path ""] + set _search_exe .exe + } else { + set _search_path [split $env(PATH) :] + set _search_exe {} + } + } + + if {[is_Windows] && [lsearch -exact $args -script] >= 0} { + set suffix {} + } else { + set suffix $_search_exe + } + + foreach p $_search_path { + set p [file join $p $what$suffix] + if {[file exists $p]} { + return [file normalize $p] + } + } + return {} +} + +proc sanitize_command_line {command_line from_index} { + set i $from_index + while {$i < [llength $command_line]} { + set cmd [lindex $command_line $i] + if {[file pathtype $cmd] ne "absolute"} { + set fullpath [_which $cmd] + if {$fullpath eq ""} { + throw {NOT-FOUND} "$cmd not found in PATH" + } + lset command_line $i $fullpath + } + + # handle piped commands, e.g. `exec A | B` + for {incr i} {$i < [llength $command_line]} {incr i} { + if {[lindex $command_line $i] eq "|"} { + incr i + break + } + } + } + return $command_line +} + +# Override `exec` to avoid unsafe PATH lookup + +rename exec real_exec + +proc exec {args} { + # skip options + for {set i 0} {$i < [llength $args]} {incr i} { + set arg [lindex $args $i] + if {$arg eq "--"} { + incr i + break + } + if {[string range $arg 0 0] ne "-"} { + break + } + } + set args [sanitize_command_line $args $i] + uplevel 1 real_exec $args +} + +# Override `open` to avoid unsafe PATH lookup + +rename open real_open + +proc open {args} { + set arg0 [lindex $args 0] + if {[string range $arg0 0 0] eq "|"} { + set command_line [string trim [string range $arg0 1 end]] + lset args 0 "| [sanitize_command_line $command_line 0]" + } + uplevel 1 real_open $args +} + +###################################################################### +## ## locate our library if { [info exists ::env(GIT_GUI_LIB_DIR) ] } { @@ -163,8 +296,6 @@ set _isbare {} set _gitexec {} set _githtmldir {} set _reponame {} -set _iscygwin {} -set _search_path {} set _shellpath {@@SHELL_PATH@@} set _trace [lsearch -exact $argv --trace] @@ -252,40 +383,6 @@ proc reponame {} { return $::_reponame } -proc is_MacOSX {} { - if {[tk windowingsystem] eq {aqua}} { - return 1 - } - return 0 -} - -proc is_Windows {} { - if {$::tcl_platform(platform) eq {windows}} { - return 1 - } - return 0 -} - -proc is_Cygwin {} { - global _iscygwin - if {$_iscygwin eq {}} { - if {$::tcl_platform(platform) eq {windows}} { - if {[catch {set p [exec cygpath --windir]} err]} { - set _iscygwin 0 - } else { - set _iscygwin 1 - # Handle MSys2 which is only cygwin when MSYSTEM is MSYS. - if {[info exists ::env(MSYSTEM)] && $::env(MSYSTEM) ne "MSYS"} { - set _iscygwin 0 - } - } - } else { - set _iscygwin 0 - } - } - return $_iscygwin -} - proc is_enabled {option} { global enabled_options if {[catch {set on $enabled_options($option)}]} {return 0} @@ -448,44 +545,6 @@ proc _git_cmd {name} { return $v } -proc _which {what args} { - global env _search_exe _search_path - - if {$_search_path eq {}} { - if {[is_Cygwin] && [regexp {^(/|\.:)} $env(PATH)]} { - set _search_path [split [exec cygpath \ - --windows \ - --path \ - --absolute \ - $env(PATH)] {;}] - set _search_exe .exe - } elseif {[is_Windows]} { - set gitguidir [file dirname [info script]] - regsub -all ";" $gitguidir "\\;" gitguidir - set env(PATH) "$gitguidir;$env(PATH)" - set _search_path [split $env(PATH) {;}] - set _search_exe .exe - } else { - set _search_path [split $env(PATH) :] - set _search_exe {} - } - } - - if {[is_Windows] && [lsearch -exact $args -script] >= 0} { - set suffix {} - } else { - set suffix $_search_exe - } - - foreach p $_search_path { - set p [file join $p $what$suffix] - if {[file exists $p]} { - return [file normalize $p] - } - } - return {} -} - # Test a file for a hashbang to identify executable scripts on Windows. proc is_shellscript {filename} { if {![file exists $filename]} {return 0} |