[gnome-builder] shellcmd: add $FILE from most recent page

[Christian Hergert <chergert src gnome org>]

commit 67ccf72eeb71b088bcf776f21ac8d1daa2a014bd
Author: Christian Hergert <chergert redhat com>
Date:   Wed Mar 10 08:51:54 2021 -0800

    shellcmd: add $FILE from most recent page
    
    This doesn't necessary play the most well when you have multiple pages
    open, but it will try to use the most recently focused page.
    
    Fixes #1418

 src/plugins/shellcmd/gbp-shellcmd-command.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
---
diff --git a/src/plugins/shellcmd/gbp-shellcmd-command.c b/src/plugins/shellcmd/gbp-shellcmd-command.c
index 48700471e..3475401e2 100644
--- a/src/plugins/shellcmd/gbp-shellcmd-command.c
+++ b/src/plugins/shellcmd/gbp-shellcmd-command.c
@@ -367,7 +367,11 @@ gbp_shellcmd_command_apply (GbpShellcmdCommand    *self,
   g_autoptr(IdeContext) context = NULL;
   g_autoptr(GFile) workdir = NULL;
   g_autoptr(GFile) cwd = NULL;
+  g_autoptr(GFile) current_file = NULL;
   const gchar *builddir = NULL;
+  IdeWorkbench *workbench;
+  IdeWorkspace *workspace;
+  IdePage *page;
 
   g_assert (GBP_IS_SHELLCMD_COMMAND (self));
   g_assert (IDE_IS_SUBPROCESS_LAUNCHER (launcher));
@@ -376,6 +380,12 @@ gbp_shellcmd_command_apply (GbpShellcmdCommand    *self,
   context = ide_object_ref_context (IDE_OBJECT (self));
   workdir = ide_context_ref_workdir (context);
 
+  workbench = ide_workbench_from_context (context);
+  workspace = ide_workbench_get_current_workspace (workbench);
+  if ((page = ide_workspace_get_most_recent_page (workspace)) &&
+      IDE_IS_EDITOR_PAGE (page))
+    current_file = ide_page_get_file_or_directory (page);
+
   if (ide_context_has_project (context))
     {
       IdeBuildManager *build_manager = ide_build_manager_from_context (context);
@@ -403,6 +413,8 @@ gbp_shellcmd_command_apply (GbpShellcmdCommand    *self,
   ide_subprocess_launcher_setenv (launcher, "SRCDIR", g_file_peek_path (workdir), TRUE);
   if (builddir != NULL)
     ide_subprocess_launcher_setenv (launcher, "BUILDDIR", builddir, TRUE);
+  if (current_file != NULL)
+    ide_subprocess_launcher_setenv (launcher, "FILE", g_file_peek_path (current_file), TRUE);
 
   if (self->environment != NULL)
     {