git-gui: run post-checkout hook on checkout

git-gui is using "git-read-tree -u" for checkout which doesn't
invoke the post-checkout hook as a plain git-checkout would.
So git-gui must call the hook itself.

Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

diff --git a/lib/checkout_op.tcl b/lib/checkout_op.tcl
index caca88831b7066c573917542d24a52e832dcff34..9e7412c446f715588b9cfe21654a3447e8680e12 100644 (file)
--- a/lib/checkout_op.tcl
+++ b/lib/checkout_op.tcl
@@ -9,6 +9,7 @@ field w_cons   {}; # embedded console window object
 field new_expr   ; # expression the user saw/thinks this is
 field new_hash   ; # commit SHA-1 we are switching to
 field new_ref    ; # ref we are updating/creating
+field old_hash   ; # commit SHA-1 that was checked out when we started
 
 field parent_w      .; # window that started us
 field merge_type none; # type of merge to apply to existing branch
@@ -280,11 +281,11 @@ method _start_checkout {} {
 
        # -- Our in memory state should match the repository.
        #
-       repository_state curType curHEAD curMERGE_HEAD
+       repository_state curType old_hash curMERGE_HEAD
        if {[string match amend* $commit_type]
                && $curType eq {normal}
-               && $curHEAD eq $HEAD} {
-       } elseif {$commit_type ne $curType || $HEAD ne $curHEAD} {
+               && $old_hash eq $HEAD} {
+       } elseif {$commit_type ne $curType || $HEAD ne $old_hash} {
                info_popup [mc "Last scanned state does not match repository state.
 
 Another Git program has modified this repository since the last scan.  A rescan must be performed before the current branch can be changed.
@@ -297,7 +298,7 @@ The rescan will be automatically started now.
                return
        }
 
-       if {$curHEAD eq $new_hash} {
+       if {$old_hash eq $new_hash} {
                _after_readtree $this
        } elseif {[is_config_true gui.trustmtime]} {
                _readtree $this
@@ -453,13 +454,47 @@ method _after_readtree {} {
 If you wanted to be on a branch, create one now starting from 'This Detached Checkout'."]
        }
 
+       # -- Run the post-checkout hook.
+       #
+       set fd_ph [githook_read post-checkout $old_hash $new_hash 1]
+       if {$fd_ph ne {}} {
+               global pch_error
+               set pch_error {}
+               fconfigure $fd_ph -blocking 0 -translation binary -eofchar {}
+               fileevent $fd_ph readable [cb _postcheckout_wait $fd_ph]
+       } else {
+               _update_repo_state $this
+       }
+}
+
+method _postcheckout_wait {fd_ph} {
+       global pch_error
+
+       append pch_error [read $fd_ph]
+       fconfigure $fd_ph -blocking 1
+       if {[eof $fd_ph]} {
+               if {[catch {close $fd_ph}]} {
+                       hook_failed_popup post-checkout $pch_error 0
+               }
+               unset pch_error
+               _update_repo_state $this
+               return
+       }
+       fconfigure $fd_ph -blocking 0
+}
+
+method _update_repo_state {} {
        # -- Update our repository state.  If we were previously in
        #    amend mode we need to toss the current buffer and do a
        #    full rescan to update our file lists.  If we weren't in
        #    amend mode our file lists are accurate and we can avoid
        #    the rescan.
        #
+       global selected_commit_type commit_type HEAD MERGE_HEAD PARENT
+       global ui_comm
+
        unlock_index
+       set name [_name $this]
        set selected_commit_type new
        if {[string match amend* $commit_type]} {
                $ui_comm delete 0.0 end