diff options
Diffstat (limited to 'generic/tclInitScript.h')
| -rw-r--r-- | generic/tclInitScript.h | 54 |
1 files changed, 41 insertions, 13 deletions
diff --git a/generic/tclInitScript.h b/generic/tclInitScript.h index a1da091..c74868b 100644 --- a/generic/tclInitScript.h +++ b/generic/tclInitScript.h @@ -5,39 +5,67 @@ * It is not used on the Mac. (the mac init script is in tclMacInit.c) * * Copyright (c) 1998 Sun Microsystems, Inc. + * Copyright (c) 1999 by Scriptics Corporation. + * All rights reserved. * - * See the file "license.terms" for information on usage and redistribution - * of this file, and for a DISCLAIMER OF ALL WARRANTIES. - * - * RCS: @(#) $Id: tclInitScript.h,v 1.9 1999/04/16 00:46:47 stanton Exp $ + * RCS: @(#) $Id: tclInitScript.h,v 1.10 1999/07/21 02:01:36 hershey Exp $ */ /* - * The following string is the startup script executed in new - * interpreters. It looks on disk in several different directories - * for a script "init.tcl" that is compatible with this version - * of Tcl. The init.tcl script does all of the real work of - * initialization. + * In order to find init.tcl during initialization, the following script + * is invoked by Tcl_Init(). It looks in several different directories: + * + * $tcl_library - can specify a primary location, if set + * no other locations will be checked + * + * $env(TCL_LIBRARY) - highest priority so user can always override + * the search path unless the application has + * specified an exact directory above + * + * $tclDefaultLibrary - this value is initialized by TclPlatformInit + * from a static C variable that was set at + * compile time + * + * $tcl_libPath - this value is initialized by a call to + * TclGetLibraryPath called from Tcl_Init. + * + * The first directory on this path that contains a valid init.tcl script + * will be set as the value of tcl_library. + * + * Note that this entire search mechanism can be bypassed by defining an + * alternate tclInit procedure before calling Tcl_Init(). */ static char initScript[] = "if {[info proc tclInit]==\"\"} {\n\ proc tclInit {} {\n\ global tcl_libPath tcl_library errorInfo\n\ + global env tclDefaultLibrary\n\ rename tclInit {}\n\ set errors {}\n\ - foreach i $tcl_libPath {\n\ + set dirs {}\n\ + if {[info exists tcl_library]} {\n\ + lappend dirs $tcl_library\n\ + } else {\n\ + if {[info exists env(TCL_LIBRARY)]} {\n\ + lappend dirs $env(TCL_LIBRARY)\n\ + }\n\ + lappend dirs $tclDefaultLibrary\n\ + unset tclDefaultLibrary\n\ + set dirs [concat $dirs $tcl_libPath] + }\n\ + foreach i $dirs {\n\ set tcl_library $i\n\ set tclfile [file join $i init.tcl]\n\ if {[file exists $tclfile]} {\n\ - if {[catch {uplevel #0 [list source $tclfile]} msg] != 1} {\n\ - return\n\ + if {![catch {uplevel #0 [list source $tclfile]} msg]} {\n\ + return\n\ } else {\n\ append errors \"$tclfile: $msg\n$errorInfo\n\"\n\ }\n\ }\n\ }\n\ set msg \"Can't find a usable init.tcl in the following directories: \n\"\n\ - append msg \" $tcl_libPath\n\n\"\n\ + append msg \" $dirs\n\n\"\n\ append msg \"$errors\n\n\"\n\ append msg \"This probably means that Tcl wasn't installed properly.\n\"\n\ error $msg\n\ |