gitk: fix the display of files when a path filter is present

Launching 'gitk -- .' or 'gitk -- ..\t' restricts the display to files
under the given directory but the file list is left empty. This is because
the path_filter function fails to match the filenames which are relative
to the working tree to the filter which is filessytem relative.
This solves the problem by making both names fully qualified filesystem
paths before performing the comparison.

Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>

diff --git a/gitk b/gitk
index a701e0d1a5221e5e4653bf124227b297af41695b..a8fea7a3cf7b056ae8de93472216028f026174c9 100755 (executable)
--- a/gitk
+++ b/gitk
@@ -14,6 +14,26 @@ proc hasworktree {} {
                  [exec git rev-parse --is-inside-git-dir] == "false"}]
 }
 
+proc gitworktree {} {
+    variable _gitworktree
+    if {[info exists _gitworktree]} {
+       return $_gitworktree
+    }
+    # v1.7.0 introduced --show-toplevel to return the canonical work-tree
+    if {[catch {set _gitworktree [exec git rev-parse --show-toplevel]}]} {
+        # try to set work tree from environment, core.worktree or use
+        # cdup to obtain a relative path to the top of the worktree. If
+        # run from the top, the ./ prefix ensures normalize expands pwd.
+        if {[catch { set _gitworktree $env(GIT_WORK_TREE) }]} {
+           catch {set _gitworktree [exec git config --get core.worktree]}
+           if {$_gitworktree eq ""} {
+               set _gitworktree [file normalize ./[exec git rev-parse --show-cdup]]
+           }
+        }
+    }
+    return $_gitworktree
+}
+
 # A simple scheduler for compute-intensive stuff.
 # The aim is to make sure that event handlers for GUI actions can
 # run at least every 50-100 ms.  Unfortunately fileevent handlers are
@@ -7393,19 +7413,15 @@ proc startdiff {ids} {
     }
 }
 
+# If the filename (name) is under any of the passed filter paths
+# then return true to include the file in the listing.
 proc path_filter {filter name} {
+    set worktree [gitworktree]
     foreach p $filter {
-       set l [string length $p]
-       if {[string index $p end] eq "/"} {
-           if {[string compare -length $l $p $name] == 0} {
-               return 1
-           }
-       } else {
-           if {[string compare -length $l $p $name] == 0 &&
-               ([string length $name] == $l ||
-                [string index $name $l] eq "/")} {
-               return 1
-           }
+       set fq_p [file normalize $p]
+       set fq_n [file normalize [file join $worktree $name]]
+       if {[string match [file normalize $fq_p]* $fq_n]} {
+           return 1
        }
     }
     return 0