From b121ac47c6c578ae9e2e3e073222e73859603edc Mon Sep 17 00:00:00 2001
From: Enrico Forestieri <forenr@lyx.org>
Date: Mon, 19 Apr 2010 23:53:23 +0000
Subject: [PATCH] Introduce a switch for overwriting files during a batch
 export. Using "-f all", or simply "-f", all files are silently overwritten.
 Using "-f main", only the main file is overwritten.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@34224 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/Buffer.cpp |  5 ++++-
 src/LyX.cpp    | 28 ++++++++++++++++++++++++++++
 src/LyX.h      |  7 +++++++
 3 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/src/Buffer.cpp b/src/Buffer.cpp
index b0688cb318..1d52a823b5 100644
--- a/src/Buffer.cpp
+++ b/src/Buffer.cpp
@@ -3377,7 +3377,8 @@ bool Buffer::doExport(string const & format, bool put_in_tempdir,
 	vector<ExportedFile> const files =
 		runparams.exportdata->externalFiles(format);
 	string const dest = onlyPath(result_file);
-	CopyStatus status = SUCCESS;
+	CopyStatus status = !use_gui && force_overwrite == ALL_FILES ? FORCE
+								     : SUCCESS;
 	
 	vector<ExportedFile>::const_iterator it = files.begin();
 	vector<ExportedFile>::const_iterator const en = files.end();
@@ -3392,6 +3393,8 @@ bool Buffer::doExport(string const & format, bool put_in_tempdir,
 		message(_("Document export cancelled."));
 	} else if (tmp_result_file.exists()) {
 		// Finally copy the main file
+		if (!use_gui && force_overwrite != NO_FILES)
+			status = FORCE;
 		status = copyFile(format, tmp_result_file,
 			FileName(result_file), result_file,
 			status == FORCE);
diff --git a/src/LyX.cpp b/src/LyX.cpp
index 7fa0916417..15ef92eff0 100644
--- a/src/LyX.cpp
+++ b/src/LyX.cpp
@@ -88,6 +88,13 @@ namespace os = support::os;
 
 bool use_gui = true;
 
+
+// Tell what files can be silently overwritten during batch export.
+// Possible values are: NO_FILES, MAIN_FILE, ALL_FILES.
+
+overwrite_files force_overwrite = NO_FILES;
+
+
 namespace {
 
 // Filled with the command line arguments "foo" of "-sysdir foo" or
@@ -1000,6 +1007,11 @@ int parse_help(string const &, string const &, string &)
 		  "\t-i [--import] fmt file.xxx\n"
 		  "                  where fmt is the import format of choice\n"
 		  "                  and file.xxx is the file to be imported.\n"
+		  "\t-f [--force-overwrite] what\n"
+		  "                  where what is either `all' or `main'.\n"
+		  "                  Using `all', all files are overwritten during\n"
+		  "                  a batch export, otherwise only the main file will be.\n"
+		  "                  Anything else is equivalent to `all', but is not consumed.\n"
 		  "\t-batch          execute commands without launching GUI and exit.\n"
 		  "\t-version        summarize version and build info\n"
 			       "Check the LyX man page for more details.")) << endl;
@@ -1102,6 +1114,20 @@ int parse_batch(string const &, string const &, string &)
 }
 
 
+int parse_force(string const & arg, string const &, string &) 
+{
+	if (arg == "all") {
+		force_overwrite = ALL_FILES;
+		return 1;
+	} else if (arg == "main") {
+		force_overwrite = MAIN_FILE;
+		return 1;
+	}
+	force_overwrite = ALL_FILES;
+	return 0;
+}
+
+
 } // namespace anon
 
 
@@ -1124,6 +1150,8 @@ void LyX::easyParse(int & argc, char * argv[])
 	cmdmap["--import"] = parse_import;
 	cmdmap["-geometry"] = parse_geometry;
 	cmdmap["-batch"] = parse_batch;
+	cmdmap["-f"] = parse_force;
+	cmdmap["--force-overwrite"] = parse_force;
 
 	for (int i = 1; i < argc; ++i) {
 		map<string, cmd_helper>::const_iterator it
diff --git a/src/LyX.h b/src/LyX.h
index 238fe38de0..dd98a370a5 100644
--- a/src/LyX.h
+++ b/src/LyX.h
@@ -34,7 +34,14 @@ class ServerSocket;
 class Session;
 class SpellChecker;
 
+enum overwrite_files {
+	NO_FILES,
+	MAIN_FILE,
+	ALL_FILES
+};
+
 extern bool use_gui;
+extern overwrite_files force_overwrite;
 
 namespace frontend {
 class Application;
-- 
2.39.2