* generic/tclInitScript.h:

	* unix/tclUnixInit.c: merged code with 8.0.5.  We now use an
	intermediate global tcl var "tclDefaultLibrary" to keep the
	"tcl_library" var from being set by the default value in the
	Makefile.  Also fixed a bug in which caused the value of
	TCL_LIBRARY env var to be ignored.
	* unix/tclWinInit.c: just updated some comments.


FossilOrigin-Name: 0d9e2ba09f2c97ca092a6cc055bebc33e8dbced7

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\