Eskil

2015-03-18
 Added command line flag "-pluginallow" to allow a plugin to run in a standard
 interpreter instead of a safe one.
 Added pdf plugin.

2015-03-17
 Added command line flag "-sep" to set a separator for table-like files
 like CSV.

2015-03-16
 Added csv plugin.

<title>Changes</title>

Upcoming changes (not yet released):

  *  Mercurial support for Directory Diff, Commit, Revert and Log.
  *  Plugins can read ::argv to know the given command line.
  *  New plugin for CSV files
  *  Added option -sep, to set a separator that makes input be interpreted
     in a table like manner.
  *  New plugin for PDF files
  *  Added option -pluginallow to run plugins in a standard interpreter instead
     of a safe one. Thus a plugin could use e.g. exec.

Changes in v2.7 (2015-03-09):

  *  Directory Diff support for GIT, Fossil and Subversion.
     Directly browse and compare two revisions.

##Eskil Plugin : Compare text from PDF files. (needs pdftotext)

# Example file for a plugin.
# A plugin must start exactly like this one.
# The text after : is the summary you can get at the command line

# This plugin runs input through the external tool pdftotext.
# Thus it must be run together with the -pluginallow flag.
# Anything given in -plugininfo is passed as parameters to pdftotext.

# A plugin must define this procedure to do the job.
# side: left or right
# chi:  An input channel for reading the original file.
# cho:  An output channel for writing the processed file.
proc PreProcess {side chi cho} {
    if {[info commands exec] eq ""} {
        puts $cho "PDF plugin must be run with -pluginallow"
        return 1
    }
    if {[auto_execok pdftotext] eq ""} {
        puts $cho "PDF plugin needs external tool 'pdftotext' to run"
        return 1
    }
    if {[catch {llength $::Info}]} {
        puts $cho "PDF plugin needs -plugininfo parameter to be a list"
        return 1
    }
    if {[catch {exec pdftotext {*}$::Info - - <@ $chi >&@ $cho}]} {
        puts $cho "**************************************"
        puts $cho "PDF plugin got an error from pdftotext"
    }

    # Signal that the file after processing should be used both
    # for comparison and for displaying.
    return 1
}