commit - f22b78bb4f965897447b30faa45acd815cba886b
commit + 39720f282faa2a1840de660fe7a9568dbf6b13a9
blob - 191bba64e131cbca60b8a7c34e94e4771dddc306
blob + ab3fdf9a8cb139197be9b873ea23fda844e5d281
--- exercise
+++ exercise
@@ -8,6 +8,7 @@ package require Tcl 8.4
 
 
 # config options
+set opts(-B) .                  ;# basedir
 set opts(-pd) {*}               ;# pattern for test search directories
 set opts(-ps) {*.tests}         ;# pattern for test suite executable files
 set opts(-pt) {*.t}             ;# pattern for test executable files
@@ -23,9 +24,8 @@ proc execute_test {countervar path} {
     # Should the test result be integrated as a nested test suite?
     set suite [string match $opts(-ps) [file tail $path]]
 
-    # Call files in current dir with "./".
-    set exe $path
-    if {[string first / $exe] < 0} {set exe "./$exe"}
+    # Call files relative to basedir, or ".".
+    set exe [file join $opts(-B) $path]
 
     if {$suite} {
         # Pass stderr through when calling test suites.
@@ -158,10 +158,14 @@ proc find_files_iter {resultvar dirsvar paths} {
 }
 
 proc find_files {paths} {
+    global opts
     set dirs {}
     set files {}
+    set workdir [pwd]
 
+    cd $opts(-B)
     find_files_iter files dirs $paths
+    cd $workdir
 
     return $files
 }
@@ -361,13 +365,6 @@ proc main {argc argv} {
 
     # determine the set of test files to operate on
     set paths [expr {$argc == 0 ? "." : $argv}]
-    if {[info exists opts(-B)]} {
-        set i 0
-        foreach path $paths {
-            lset paths $i [file join $opts(-B) $path]
-            incr i
-        }
-    }
     set files [find_files $paths]
 
     # run the tests