I am working on a bit of TH documentation, will publish over the next few weeks. As far as I can tell now, the only structural difference is the use of :: for accessing global vars, rest works identical to Tcl. Commands are a subset and have some differences (see below for draft command list). I've carved out th.h, th.c, th_lang.c & th_main.c and with a few hacks made a stand-alone TH interpreter. With a few commands added (lsort, foreach, append) it would be capable of running the makemake.tcl script. I guess here is an opportunity to remove the dependence on tcl for building fossil. At first I thought to find a command for working with the database directly, in the vein of the sqlite command for tcl. However this does not seem to exist and from a brief look at the ticketing system (tkt.c) I figure that the philosophy is to have C code prepare variables/lists before a TH script is run. Correct? Also found a bug, I think: the "puts" and "html" commands seem to be reversed. In "putsCmd" change "pConvert!=0" to "pConvert==0" to fix. Herewith the TH built-in command list and some other observations as a start for documentation: <language core commands> catch script ?varname? if expr1 body1 ?elseif expr2 body2? ? ?else? bodyN? expr expr for init condition incr script list ?arg1 ?arg2? ...? lindex list index llength list set varname ?value? proc name arglist code rename oldcmd newcmd break ?value...? continue ?value...? error ?value...? return ?-code code? ?value? string compare STRING1 STRING2 string first NEEDLE HAYSTACK ?STARTINDEX? string is CLASS STRING string last NEEDLE HAYSTACK ?STARTINDEX? string length STRING string range STRING FIRST LAST string repeat STRING COUNT info exists VAR unset VAR uplevel ?LEVEL? SCRIPT upvar ?FRAME? OTHERVAR MYVAR ?OTHERVAR MYVAR ...? breakpoint ARGS <fossil extension commands> enable_output BOOLEAN puts STRING html STRING wiki STRING htmlize STRING date hascap STRING combobox NAME TEXT-LIST NUMLINES linecount STRING MAX MIN ** The TH1 scripts are contained within <th1>...</th1>. ** TH1 variables are $aaa or $<aaa>. The first form of ** variable is literal. The second is run through htmlize ** before being inserted. predefined fossil variables: "project_name" "title" "baseurl" "index_page" "current_page" "manifest_version" "manifest_date"
Regards, Paul ________________________________ From: fossil-users-boun...@lists.fossil-scm.org on behalf of D. Richard Hipp Sent: Mon 4/27/2009 2:59 PM To: fossil-users@lists.fossil-scm.org Subject: Re: [fossil-users] Documentation TH1 On Apr 27, 2009, at 8:56 AM, <p...@planet.nl> <p...@planet.nl> wrote: > Is there documentation for the Fossil scripting language "TH" (or is > it "TH1"?) available somewhere? > Or is it a matter of "Use the Source, Luke" :^) > Unfortunately, the only documentation currently available is the source code. This is a deficiency that needs to be addressed. D. Richard Hipp d...@hwaci.com
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