Change history

Version 5.4 (13 Feb 2009)

  • Fixed build problems on various systems.

Version 5.3 (14 Nov 2008)

  • IFM is now hosted at Bitbucket.
  • New them keyword, which refers to the list of items mentioned in the current statement.
  • New game-solver variables: finish_room, finish_item and finish_task, which can be a comma-separated list of extra rooms, items and tasks which get assigned the finish attribute (i.e., cause the solver to exit).
  • New task graph variables: task_graph_wrap, which controls word-wrapping when printing graph nodes, and task_graph_font, which sets the text font.
  • The new keywords true and false can be used in place of 1 and 0, respectively, when setting variables.
  • Both versions of the personal initialization file (.ifmrc and ifm.ini) are now read, if they exist.
  • There’s a new Perl script ifm2web, which converts IFM maps to image files suitable for the Interweb.
  • The GNU Emacs ifm-mode.el in the contrib directory has been improved: it can display task recording and debugging output, now has imenu and flymake support, and a minor bug fix.
  • The documentation is now much prettier, thanks to Sphinx and Pygments. The contrib directory contains the Python module used to syntax-highlight IFM code and IF transcripts.
  • Since asciimapper is now in the IF archive, it is no longer part of the contrib directory.
  • PostScript maps now conform properly to Adobe DSC. This stops Ghostscript 8.x barfing on them.

Version 5.2 (7 Sep 2006)

  • There’s a new -errors option, which controls the maximum number of errors printed before giving up.
  • New program in the contrib directory: asciimapper. This is a tool to create IFM maps from ASCII art maps, contributed by Elijah Griffin.
  • The GNU Emacs ifm-mode.el in the contrib directory has new commands to display maps, items and tasks and various other things. Based on an initial version contributed by Lee Bigelow.
  • Several unused features which added needless complexity have been removed. These are: preprocessing by gpp, expressions for real/integer values, and variable interpolation in strings.
  • An obscure bug has been fixed which involved the follow and need attributes combined. This caused some valid task orderings to be flagged as cycles.
  • A bug with modification of room attributes has been fixed.
  • Don’t crash when trying to solve game and there are no rooms.
  • A crash when trying to print an error message about cyclic task dependencies has been fixed.

Version 5.1 (30 Nov 2004)

  • The tkifm program now supports line numbering and syntax highlighting, thanks to a contributor who wishes to remain anonymous.
  • There is now a man page summarizing the command-line options.
  • In PostScript output, up/down and in/out labels are now drawn separately, next to their respective rooms. Also, if a link leaves a room and returns to the same room, it’s drawn as a small circle. Thanks to Dan Eble.
  • Hopefully, the Windows port should work properly now.
  • Fixed weird bug with scaled arcs in PostScript output. More thanks to Dan Eble.
  • Fixed bug in ifm2tex with converting strings to TeX format (specifically, ones with embedded zeros).
  • Fixed crash when using it in some circumstances.

Version 5.0 (23 Jan 2003)

  • New map output: Fig format, suitable for viewing or editing with Xfig, or exporting to other formats.
  • New utility program: ifm2dev, which pipes IFM output in Fig format through fig2dev repeatedly to write each map section to its own file.
  • New utility program: ifm2tex, which converts Fig files to EPS and includes them in a LaTeX document together with tables of items and tasks.
  • New task output: graphviz (dot) format, which dumps a task dependency graph.
  • New keep with and keep until syntax for items, allowing items to be kept until certain tasks are done or certain other items are dropped.
  • New room nodrop attribute, indicating that no items should be dropped there.
  • New task and item ignore attribute, indicating that these things should be ignored when finding a solution.
  • New task do attribute, indicating that when a task is done, it also does one or more other tasks automatically.
  • New option: -style, which sets global styles for all IFM objects.
  • New option: -set, which lets you set variables from the command line. To support this, the variable-setting syntax has been changed: instead of a space separating the driver name from the variable, there’s now a period.
  • New -show option: maps, which lists all the map sections and their sizes.
  • The -map option now accepts an optional list of map sections to print.
  • There’s a bunch of new variables to control things, including the overall behaviour of the game solver.
  • IFM input is now preprocessed, in a similar way to C programs. As a result, the old include and alias features have been replaced with the preprocessor equivalents.
  • There’s a new require keyword, which lets you say that a certain version of IFM (or later) is required for a map.
  • Changed implicit-link style behaviour: the style clause on a room now applies to both the room and the implicit link, so it’s now independent of its position relative to the dir clause.
  • The command-line option -debug has been removed; its functionality has been replaced by a control variable.
  • The old puzzle and special attributes have finally been removed; if you have any old maps which use these, you must replace them with the corresponding styles instead.
  • Documentation is now distributed in HTML and PDF formats, instead of GNU Info.
  • The GNU Emacs IFM mode in the contrib directory now has font lock support. The ifm.vim file has also been updated with the latest keywords.
  • Fixed bug with room link and join attributes: it didn’t work to use last as an argument.
  • Fixed glitch in room text on PostScript output: now tries reducing font size before squishing, so that text is filled better.

Version 4.1 (10 May 1999)

  • Fixed minor task bug: in special cases, giving items caused solver to fail to find newly-opened paths.
  • Fixed stupid blunder with DOS \r characters in one of the source files.
  • Fixed core dump problem when reading colour definitions (on FreeBSD, at least).

Version 4.0 (21 Apr 1999)

  • PostScript driver can now print in colour.
  • New 3D room shadowing effect on maps.
  • Many new output variables to control new map features.
  • Variables can now be set via expressions, not just values. Variables can now be used to customize many aspects of the input (e.g., notes, repeat counts).
  • Individual parts of the map can now be customized using display styles.
  • New include syntax, which allows files to include other files, either explicitly or via a path search.
  • New -include (-I) option to prepend directories to the search path from the command line.
  • New -show option to show various things (defined variables, search path), also included in tkifm menus.
  • More information is now printed in item lists: which tasks require an item, which tasks an item requires, etc.
  • Some example maps are now bundled with IFM, in the demos subdirectory.
  • Names and defaults of many output variables have been changed in order to make them more consistent.
  • Extra complexity in variable syntax has been removed, as it wasn’t being used. Specifically, variables can’t be set according to type of output or per-map-section any more, only by output driver.
  • Removed formatted man page documentation: now only Info, HTML and text documentation is distributed. If there are enough complaints, I’ll put it back.
  • The puzzle and special attributes are now obsolete; they’re replaced by display styles.
  • tkifm now redisplays old map windows when refreshing the map.
  • Win32 version is now compiled with Cygwin b20, and so requires cygwin1.dll (not cygwin.dll), included in the distribution. See README.win32 for details.

Version 3.0 (1 Oct 1998)

  • There’s a new program scr2ifm in the distribution, which attempts to convert a game transcript into IFM format. It’s a perl script, and gets installed on Unix-type systems if perl is detected.
  • New nolink attribute for rooms, which suppresses generation of an implicit link between this and the previous room.
  • New nopath attribute for rooms, links and joins, which stops those map connections from being used by the game solver.
  • New task cmd none syntax, for tasks that don’t need any special user commands (e.g., visiting a room for the first time).
  • New PostScript variable link_arrowsize, which allows you to change the size of arrowheads on one-way links.
  • tkifm is now installed automatically on Unix-type systems if wish (or one of its namesakes) is detected.
  • tkifm now shows busy-cursor when doing something CPU-intensive.
  • Improved solver failure messages, which give more information about what’s wrong.
  • Removed PostScript documentation from distribution.
  • The times keyword is now obsolete (but still works, for compatibility); just the repeat count is used instead.
  • Fixed bug with drop all except clause; it was treating it as just a simple drop clause.
  • Fixed bug in task path calculation; it didn’t always choose the best route between rooms.
  • Linking a room to itself with no dir clause now results in an error, instead of failing mysteriously at the map-drawing stage.
  • Minor fixes to make installation smoother on FreeBSD.

Version 2.1 (26 Aug 1998)

  • Fixed bug which caused some types of variable not to be set properly.
  • Minor fixes to library functions to link properly under Solaris.

Version 2.0 (19 Aug 1998)

  • Lots of new keywords for use by the game solver, which has been considerably enhanced.
  • New commands to modify previous definitions, which allow you to keep all game hacks in one place.
  • New show_tags variable, which toggles addition of room tag names to room descriptions.
  • New -debug command-line option, which gives the gory details of what the game solver is up to.
  • New recording output, which can generate commands to play back in interpreters.
  • Package now has a test suite.
  • Links and joins can now be hidden, which means they’re used only for task purposes.
  • Removed groff output; it’s not worth supporting any more, now that PostScript output works so well.
  • Text task output now prints details of the rooms you move through to get places, including directions moved in (or commands typed to move that way).
  • PostScript driver now has some standard page sizes. Also there’s a variable page_rotate which can override the default decisions on whether to print landscape or not.
  • Having no rooms defined is not an error any more, in order to placate tkifm.
  • Changed list attributes to be cumulative, instead of overriding previous value.
  • Variables can now be set to undef, which allows their default setting to reappear.
  • Various tkifm enhancements to make it convenient to use your preferred editor.
  • Unix version now uses GNU autoconf/automake for installation.
  • Got tkifm save-as option to set current filename properly.
  • Stopped outside grid warnings from causing tkifm to fail when drawing map.
  • Library function now doesn’t clobber read-only strings.

Version 1.0 (11 Jun 1998)

  • First release.