Update lilygit.tcl (Issue 2092)

Makes lilygit.tcl respect the environment variable $LILYPOND_GIT.
If $LILYPOND_GIT is unset, default of $HOME/lilypond-git will be used.

Also does all working on dev/local_working branch, instead of master

Adds a Push Patch button to push patch to staging, which is optionally
configured, such that it only displays if push access is available
and the user is not a translations user.

Add support for the environment variable LILYPOND_BRANCH, which can
be prepended to the call to lily-git.tcl to specify the branch to be used.

Add pushHead so we can base patches on master but push to staging

Add log preview so that the user is expected to review the git log before
pushing.

Rebase before pushing.  The rebasing is to origin/staging,
and is performed on a detached head before pushing.  This preserves the
working branch in case of staging breaking and being recreated.

Add environment variable PUSH_ACCESS for controlling push access

1 files changed, 144 insertions, 8 deletions

diff --git a/scripts/auxiliar/lily-git.tcl b/scripts/auxiliar/lily-git.tcl
index 637d3874bc..7767686f4a 100755
--- a/scripts/auxiliar/lily-git.tcl
+++ b/scripts/auxiliar/lily-git.tcl
@@ -3,14 +3,27 @@
 # GUI interface for common LilyPond git repository commands
 # Copyright 2009--2012 by Johannes Schindelin and Carl Sorensen
 #
+package require Tk
 
-set version 0.64
+set version 0.66
 
+proc get_environment_var {var_name default_value} {
+    global env
+    if [catch {set return_value $env($var_name)}] {
+        set return_value $default_value
+    }
+    return $return_value
+}
 # set to 1 to set up for translation, to 0 for other
 set translator 0
 
+# If you have push access, set to 1, or use LILYPOND_GIT_PUSH
+set default_push_access 0
+set push_access [get_environment_var "LILYPOND_GIT_PUSH" $default_push_access]
+
+
 # location of lilypond git
-set lily_dir $env(HOME)/lilypond-git
+set lily_dir [get_environment_var LILYPOND_GIT $env(HOME)/lilypond-git]
 
 if {$translator == 1} {
     set windowTitle \
@@ -18,6 +31,7 @@ if {$translator == 1} {
     set updateButtonText "1. Update translation"
     set initializeButtonText "1. Get translation"
     set originHead "lilypond/translation"
+    set pushHead $originHead
     set rebase 0
 } else {
     set windowTitle \
@@ -25,9 +39,11 @@ if {$translator == 1} {
     set updateButtonText "1. Update source"
     set initializeButtonText "1. Get source"
     set originHead "master"
+    set pushHead "staging"
+    set defaultBranch "dev/local_working"
     set rebase 1
 }
-package require Tk
+
 
 ##  Submits the user data collected using the git config command
 
@@ -118,10 +134,14 @@ set commit_header {}
 
 # Helper functions
 
-if {[file exists $lily_dir]} {
-    cd $lily_dir
+proc add_working_branch {} {
+    global originHead
+    global workingBranch
+    git checkout $originHead
+    git branch -f $workingBranch
 }
 
+
 set abort_dir "./aborted_edits"
 
 proc write_to_output {s} {
@@ -214,7 +234,10 @@ proc update_lilypond_with_rebase {} {
 proc update_lilypond {rebase} {
     global lily_dir
     global originHead
+    global pushHead
     global translator
+    global workingBranch
+    global push_access
     . config -cursor watch
     if {![file exists $lily_dir]} {
         write_to_output "Cloning LilyPond (this can take some time) ...\n"
@@ -228,17 +251,26 @@ proc update_lilypond {rebase} {
         git reset --hard origin/$originHead
         git config branch.$originHead.remote origin
         git config branch.$originHead.merge refs/heads/$originHead
+        git checkout $originHead
+        if {$workingBranch != ""} {
+            add_working_branch
+            git checkout $workingBranch
+        }
         .buttons.commitFrame.commit configure -state normal
         .buttons.commitFrame.amend configure -state normal
         .buttons.update configure -text buttonUpdateText
         .buttons.patch configure -state normal
+        if {$push_access && !$translator} {
+            .buttons.push configure -state normal
+        }
         .buttons.panic configure -state normal
         toggle_rebase
     } else {
         write_to_output "Updating LilyPond...\n"
         git fetch origin
         if {$rebase} {
-            git rebase origin/$originHead
+            git rebase origin/$originHead $originHead
+            git rebase origin/$originHead $workingBranch
         } else {
             git merge origin/$originHead
         }
@@ -267,6 +299,33 @@ proc make_patch_from_origin {rebase} {
     . config -cursor ""
 }
 
+
+proc push_patch_to_staging {} {
+    global workingBranch
+    global pushHead
+    global git_log
+    global push_canceled
+    global log_text
+    global originHead
+
+    git rebase $originHead $workingBranch
+    set staging_sha [exec git rev-parse ]
+    set head_sha [exec git rev-parse $workingBranch]
+    set log_error [catch {exec git --no-pager log {--pretty=format:%h : %an -- %s} --graph $originHead..$workingBranch} log_text]
+    if {$log_error == 0 && $log_text == ""} {
+        tk_messageBox -type ok -message "No changes in repository.  Nothing to push."
+    } else {
+        get_git_log
+        tkwait visibility .gitLogWindow
+        tkwait window .gitLogWindow
+        if {$push_canceled == 0} {
+            git rebase origin/$pushHead $workingBranch~0
+            git push origin HEAD:$pushHead
+            git checkout $workingBranch
+        }
+    }
+}
+
 proc abort_changes {} {
     global abort_dir
     global originHead
@@ -335,6 +394,59 @@ proc commitMessageCancel {} {
     destroy .commitMessage
 }
 
+proc pushContinue {} {
+  global push_canceled
+  set push_canceled = 0
+  destroy .gitLogWindow
+}
+
+proc pushCancel {} {
+    global push_canceled
+    set push_canceled 1
+    destroy .gitLogWindow
+}
+
+
+# git log output window
+proc get_git_log {} {
+    global log_text
+    toplevel .gitLogWindow
+    frame  .gitLogWindow.messageFrame
+
+
+    text   .gitLogWindow.messageFrame.message_body \
+       -xscrollcommand [list .gitLogWindow.messageFrame.horizontal set] \
+       -yscrollcommand [list .gitLogWindow.messageFrame.vertical set] \
+         -width 60  -height 10 -relief solid -border 2 -wrap none
+    scrollbar .gitLogWindow.messageFrame.horizontal -orient h -command [list .gitLogWindow.messageFrame.message_body xview]
+    scrollbar .gitLogWindow.messageFrame.vertical -orient v -command [list .gitLogWindow.messageFrame.message_body yview]
+
+    frame .gitLogWindow.messageFrame.leftFrame
+    label .gitLogWindow.messageFrame.leftFrame.label \
+        -text "Log of commits in push:"
+    button .gitLogWindow.messageFrame.leftFrame.ok \
+        -text Continue -default active -command pushContinue
+    button .gitLogWindow.messageFrame.leftFrame.cancel -text Cancel -default active \
+        -command pushCancel
+    wm withdraw .gitLogWindow
+    wm title .gitLogWindow "Commits to be pushed"
+
+    pack .gitLogWindow.messageFrame.leftFrame.label
+    pack .gitLogWindow.messageFrame.leftFrame.ok
+    pack .gitLogWindow.messageFrame.leftFrame.cancel
+
+    pack .gitLogWindow.messageFrame.leftFrame -side left
+
+    pack .gitLogWindow.messageFrame.horizontal -side bottom -fill x
+    pack .gitLogWindow.messageFrame.vertical -side right -fill y
+    pack .gitLogWindow.messageFrame.message_body -expand true -anchor nw -fill both
+    pack .gitLogWindow.messageFrame
+
+    wm transient .gitLogWindow .
+    wm deiconify .gitLogWindow
+    .gitLogWindow.messageFrame.message_body insert insert $log_text
+}
+
 
 # Commit message input window
 proc get_commit_message {} {
@@ -396,6 +508,10 @@ button .buttons.update -text $updateButtonText \
     -command update_lilypond_with_rebase
 button .buttons.patch -text "3. Make patch set" \
     -command patch_from_origin
+if {$push_access && !$translator} {
+    button .buttons.push -text "4. Push patch to staging" \
+    -command push_patch_to_staging
+}
 toggle_rebase
 button .buttons.panic -text "Abort changes -- Reset to origin" \
     -command abort_changes -fg Blue -bg Red
@@ -406,6 +522,9 @@ if {![file exists $lily_dir]} {
     .buttons.commitFrame.commit configure -state disabled
     .buttons.commitFrame.amend configure -state disabled
     .buttons.patch configure -state disabled
+    if {$push_access} {
+        .buttons.push configure -state disabled
+    }
     .buttons.panic configure -state disabled
 }
 
@@ -414,6 +533,9 @@ if {![file exists $lily_dir]} {
 pack .buttons.update -side left
 pack .buttons.commitFrame -side left
 pack .buttons.patch -side left
+if {$push_access} {
+    pack .buttons.push -side left
+}
 pack .buttons.spacer -side left
 pack .buttons.panic -side right
 
@@ -436,5 +558,19 @@ pack .output.text -expand true -anchor nw -fill both
 pack .buttons
 pack .output
 
-#grid .buttons -row 2 -column 1
-#grid .output -row 3 -column 1 -sticky "w"
+# set working branch and push branch
+set workingBranch [get_environment_var LILYPOND_BRANCH $defaultBranch]
+
+puts "\nworkingBranch $workingBranch\n"
+
+if {[file exists $lily_dir]} {
+    cd $lily_dir
+    set branchList  [exec git branch]
+    if { $workingBranch != ""} {
+        if {![regexp $workingBranch $branchList]} {
+            add_working_branch
+        }
+        git checkout $workingBranch
+    }
+}
+