diff options
Diffstat (limited to 'generic/tclInitScript.h')
| -rw-r--r-- | generic/tclInitScript.h | 67 |
1 files changed, 48 insertions, 19 deletions
diff --git a/generic/tclInitScript.h b/generic/tclInitScript.h index b8900cf..1fefec2 100644 --- a/generic/tclInitScript.h +++ b/generic/tclInitScript.h @@ -14,38 +14,67 @@ * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * SCCS: %Z% $Id: tclInitScript.h,v 1.3 1998/07/24 13:49:59 surles Exp $ + * SCCS: %Z% $Id: tclInitScript.h,v 1.4 1998/07/24 15:36:40 stanton Exp $ */ /* - * The following string is the startup script executed in new interpreters. - * It looks on disk in (way too many) 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 + * + * $tclDefaultLibrary - this value is initialized by TclPlatformInit + * from a static C variable that was set at + * compile time + * + * <executable directory>/../lib/tcl$tcl_version + * - look for a lib/tcl<ver> in a sibling of + * the bin directory (e.g. /usr/local) + * + * <executable directory>/../library + * - look in build directory + * + * <executable directory>/../../tcl$tcl_patchLevel/library + * - look for tcl build directory relative + * to a parallel build directory (e.g. Tk) + * + * The first directory on this path that contains a valid init.tcl script + * will be appended to tcl_pkgPath and 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_library tcl_version tcl_patchLevel errorInfo\n\ - global env tcl_pkgPath\n\ + global tcl_pkgPath env tclDefaultLibrary\n\ rename tclInit {}\n\ set errors {}\n\ set dirs {}\n\ - if {[info exists env(TCL_LIBRARY)]} {\n\ - lappend dirs $env(TCL_LIBRARY)\n\ - }\n\ - lappend dirs $tcl_library\n\ - set parentDir [file dirname [file dirname [info nameofexecutable]]]\n\ - lappend dirs [file join $parentDir lib/tcl$tcl_version]\n\ - if {[string match {*[ab]*} $tcl_patchLevel]} {\n\ - set lib tcl$tcl_patchLevel\n\ + if {[info exists tcl_library]} {\n\ + lappend dirs $tcl_library\n\ } else {\n\ - set lib tcl$tcl_version\n\ + if {[info exists env(TCL_LIBRARY)]} {\n\ + lappend dirs $env(TCL_LIBRARY)\n\ + }\n\ + lappend dirs $tclDefaultLibrary\n\ + unset tclDefaultLibrary\n\ + set parentDir [file dirname [file dirname [info nameofexecutable]]]\n\ + lappend dirs [file join $parentDir lib/tcl$tcl_version]\n\ + lappend dirs [file join $parentDir library]\n\ + if {[string match {*[ab]*} $tcl_patchLevel]} {\n\ + set ver $tcl_patchLevel\n\ + } else {\n\ + set ver $tcl_version\n\ + }\n\ + lappend dirs [file join [file dirname $parentDir] tcl$ver/library]\n\ }\n\ - lappend dirs [file join [file dirname [file dirname [pwd]]] $lib/library]\n\ - lappend dirs [file join [file dirname [pwd]] library]\n\ - lappend dirs [file join [file dirname $parentDir] $lib/library]\n\ - lappend dirs [file join $parentDir library]\n\ foreach i $dirs {\n\ set tcl_library $i\n\ set tclfile [file join $i init.tcl]\n\ |