Eskil

}

#####################################
# Startup stuff
#####################################

proc printUsage {} {
    puts {Usage: eskil [options] [files...]
  [options]  See below.
  [files...] Files to be compared

  If no files are given, the program is started anyway and you can select


  files from within. If only one file is given, the program looks for version

  control of the file, and if found, runs in version control mode.

  If directories are given, Eskil starts in directory diff.



  To list all options matching a prefix, run 'eskil --query prefix'.









  In tcsh use this line to get option completion:
  complete eskil 'C/-/`eskil --query -`/'







  Options:}









    # Dump option info
    foreach name [lsort -dictionary [dict keys $::eskil(opts,info)]] {
        set outName $name
        if {![dict exists $::eskil(opts,info) $name flag]} {
            puts "Internal Error: BOHOHOHO $name"
            break
        }

        if {![dict get $::eskil(opts,info) $name flag]} {
            append outName " <v>"
        }
        # Line up shorter ones
        if {[string length $outName] < 10} {

            set outName [format %-10s $outName]

        }
        set outName "$outName : "
        set indent [string length $outName]

        set len [expr {80 - $indent}]
        set d [dict get $::eskil(opts,info) $name shortdescr]
        if {$d eq "_"} continue
        while {$d ne ""} {
            if {[string length $d] <= $len} {
                set chunk $d
                set d ""
            } else {
                set ci $len
                while {[string index $d $ci] ne " " && $ci > 40} {
                    incr ci -1
                }
                set chunk [string range $d 0 $ci-1]
                set d [string trim [string range $d $ci end]]

            }
            puts "$outName$chunk"
            set outName [format %*s $indent ""]
        }

    }



}

#####################################
# Option/flag handling helpers
#####################################
# Validators
proc optValidatePdfColor {opt arg} {

        flag 0
        given 0
        multi 0
        type ""
        validator ""
        filter ""
        sideeffect ""
        shortdescr ""
        longdescr ""
    } 
}
# Add a command line flag that do not take a value
proc addFlags {args} {
    foreach name $args {
        dict set ::eskil(opts) $name 0
        dict set ::eskil(opts,info) $name $::eskil(defoptinfo)
        dict set ::eskil(opts,info) $name flag  1
    }
}
# Document a flag
proc docFlag {name short {long {}}} {
    dict set ::eskil(opts,info) $name shortdescr $short
    dict set ::eskil(opts,info) $name longdescr $long
}

# Flag that affects Pref
proc addPrefFlag {name elem {value 1}} {
    dict set ::eskil(opts) $name 0
    dict set ::eskil(opts,info) $name $::eskil(defoptinfo)
    dict set ::eskil(opts,info) $name flag  1
    dict set ::eskil(opts,info) $name type Pref
    dict set ::eskil(opts,info) $name "elem" $elem

        Init
        return [makeDiffWin]
    }

    # Set up all options info
    initOpts
    addFlags --help -help
    
    addPrefFlag -w          ignore -w
    addPrefFlag -b          ignore -b 
    addPrefFlag -noignore   ignore " "
    docFlag     -w          "Ignore all spaces"
    docFlag     -b          "Ignore space changes (default)"
    docFlag     -noignore   "Don't ignore any whitespace"
    addPrefFlag -noparse    parse 0
    addPrefFlag -line       parse 1
    addPrefFlag -smallblock parse 2
    addPrefFlag -block      parse 3
    docFlag -noparse    "No block analysis"
    docFlag -line       "Line based block analysis"
    docFlag -smallblock "Do block analysis on small blocks (default)"
    docFlag -block      "Full block analysis. This can be slow if there are large change blocks"

    addPrefFlag -char       lineparsewords 0
    addPrefFlag -word       lineparsewords 1
    docFlag     -char       "Character based change view (default)"
    docFlag     -word       "Word based change view"
    addPrefFlag -i          nocase
    addPrefFlag -nocase     nocase 
    docFlag     -i          "Ignore case changes"
    docFlag     -nocase     "Ignore case changes"
    addPrefFlag -nodigit    nodigit
    docFlag     -nodigit    "Ignore digit changes"
    addPrefFlag -nokeyword  dir,ignorekey
    docFlag     -nokeyword  "In directory diff, ignore \$ Keywords: \$"
    addPrefFlag -noempty    noempty
    docFlag     -noempty    "Ignore empty lines initially for matching"
    addPrefFlag -fine       finegrainchunks
    docFlag     -fine       "Use fine grained chunks. Useful for merging"
    addOptsFlag -table      view  table
    docFlag     -table      "Run in table mode"
    addOptsFlag -conflict mode conflict
    docFlag -conflict "Treat file as a merge conflict file and enter merge mode"
    # Conflict implies foreach
    addSideEffect -conflict {
        optSet -foreach 1
    }
    addFlags -dir -clip -patch -review -
    docFlag -dir    "Start in directory diff mode. Ignores other args"
    docFlag -clip   "Start in clip diff mode. Ignores other args"
    docFlag -patch  "View patch file"
    docFlag -       "Read patch file from standard input, to allow pipes"
    docFlag -review "View revision control tree as a patch."
    addFlags -browse -nodiff
    docFlag -browse "Automatically bring up file dialog after starting"
    docFlag -nodiff "Do not run diff after startup"
    addFlags -server -cvs -svn -debug
    docFlag -server "Set up Eskil to be controllable from the outside"
    docFlag -cvs    "Detect CVS first, if multiple version systems are used"
    docFlag -svn    "Detect SVN first, if multiple version systems are used"
    docFlag -debug  "Start in debug mode"
    addFlags -foreach -close
    docFlag -foreach "Open one diff window per file listed"
    docFlag -close   "Close windows with no changes"
    addFlags -nonewline -nonewline+ -nocdiff
    docFlag -nonewline  "Try to ignore newline changes"
    docFlag -nonewline+ "Try to ignore newline changes, and don't display"
    docFlag -nocdiff    "Disable C version of DiffUtil. For debug"
    addFlags -pluginlist -pluginallow
    docFlag -pluginlist  "List known plugins"
    docFlag -pluginallow "Allow full access privilege for a plugin"
    # Options that take values
    addOpt   -plugin
    docFlag  -plugin "Preprocess files using plugin"
    addValidator -plugin optValidatePlugin
    addOpt   -plugininfo
    docFlag  -plugininfo "Pass info to plugin (plugin specific)"
    addOpt   -plugindump
    docFlag  -plugindump "Dump plugin source to stdout"
    # These options affect Pref
    addPrefOpt -pivot             pivot             optValidatePositive
    docFlag    -pivot "Pivot setting for diff algorithm (100)"
    addPrefOpt -context           context           optValidateNatural
    docFlag    -context "Show only differences, with <n> lines of context"
    addPrefOpt -printHeaderSize   printHeaderSize   optValidatePositive
    addPrefOpt -printCharsPerLine printCharsPerLine optValidatePositive
    addPrefOpt -printPaper        printPaper        optValidatePaper
    addPrefOpt -printColorChange  printColorChange  optValidatePdfColor
    addPrefOpt -printColorOld     printColorOld     optValidatePdfColor  
    addPrefOpt -printColorNew     printColorNew     optValidatePdfColor
    addPrefOpt -printFont         printFont
    docFlag -printHeaderSize   "Font size for page header (10)"
    docFlag -printCharsPerLine "Adapt font size for this line length and wrap (80)"
    docFlag -printPaper       "Select paper size (a4)"
    docFlag -printColorChange "Color for change (1.0 0.7 0.7)"
    docFlag -printColorOld    "Color for old text (0.7 1.0 0.7)"
    docFlag -printColorNew    "Color for new text (0.8 0.8 1.0)"
    docFlag -printFont "Select font to use in PDF, afm or ttf. If <fontfile> is given as \"Courier\", PDF built in font is used"
    addMultOpt -prefix
    docFlag    -prefix "Care mainly about words starting with \"str\""
    addMultOpt -preprocess
    addMultOpt -preprocessleft
    addMultOpt -preprocessright
    docFlag    -preprocess  "TBW <pair>"
    docFlag    -preprocessleft  "TBW <pair>"
    docFlag    -preprocessright "TBW <pair>"
    # These affect opts
    addOptsOpt -limit    limitlines
    docFlag    -limit "Do not process more than <lines> lines"
    addOptsOpt -maxwidth maxwidth
    docFlag    -maxwidth "Limit column width in table mode"
    addOptsOpt -o mergeFile 
    docFlag    -o "Specify merge result output file"
    addFilter  -o [list file join [pwd]]
    addOptsOpt -a ancestorFile
    docFlag    -a "Give ancestor file for three way merge"
    addFilter  -a [list file join [pwd]]
    # Default is no ignore on three-way merge
    addSideEffect -a { set ::Pref(ignore) " " }
    addOptsOpt -sep separator
    docFlag -sep "See char <c> as separator between columns in files"
    # Handle if separator is given e.g. as '\t'
    addFilter  -sep [list subst -nocommands -novariables]
    addOptsOpt -print    printFile
    docFlag -print           "Generate PDF and exit."
    addOptsOpt -printpdf printFile ;# Old option
    docFlag -printpdf        "_"
    addSideEffect -print    { set opts(printFileCmd) 1 }
    addSideEffect -printpdf { set opts(printFileCmd) 1 }
    addMultOpt -r
    docFlag -r "Version info for version control mode"

    # If the first option is "--query", use it to ask about options.
    if {$::eskil(argc) == 2 && [lindex $::eskil(argv) 0] == "--query"} {
        set arg [lindex $::eskil(argv) 1]
        set allOpts [allOpts]
        if {[lsearch -exact $allOpts $arg] < 0} {
            set match [lsearch -glob -all -inline $allOpts $arg*]