cli interactive/pipe mode

1 files changed, 27 insertions, 13 deletions

diff --git a/src/biruda.c b/src/biruda.c
index a2fbc08..3934d55 100644
--- a/src/biruda.c
+++ b/src/biruda.c
@@ -225,6 +225,8 @@ static char *commands[] = {
 
 static bool print_colors = false;
 
+static bool is_interactive = false;
+
 static void completion_func( const char *buf, linenoiseCompletions *lc )
 {
 	unsigned int i;
@@ -303,23 +305,31 @@ static int start_interactive( bool colors )
 {
 	char history_filename[1024];
 	
-	print_colors = colors;
-
-	char *home = getenv( "HOME" );
-	if( home != NULL ) {
-		snprintf( history_filename, sizeof( history_filename ), "%s/%s", home, HISTORY_FILE );
-		linenoiseHistoryLoad( history_filename );
-		linenoiseSetCompletionCallback( completion_func );
+	is_interactive = isatty( fileno( stdin ) );
+	print_colors = is_interactive ? colors : false;
+
+	if( is_interactive ) {
+		char *home = getenv( "HOME" );
+		if( home != NULL ) {
+			snprintf( history_filename, sizeof( history_filename ), "%s/%s", home, HISTORY_FILE );
+			linenoiseHistoryLoad( history_filename );
+			linenoiseSetCompletionCallback( completion_func );
+		}
 	}
 	
 	char *context = "biruda";
 	for( ;; ) {
 		char buf[4096];
 		char *line;
-		
-		snprintf( buf, sizeof( buf ), "%s> ", context );
-		if( ( line = linenoise( buf ) ) == NULL ) {
-			break;
+
+		if( is_interactive ) {
+			snprintf( buf, sizeof( buf ), "%s> ", context );
+			if( ( line = linenoise( buf ) ) == NULL ) {
+				break;
+			}
+		} else {
+			fgets( buf, sizeof( buf ), stdin );
+			line = buf;
 		}
 		
 		if( strlen( line ) > 1 ) {
@@ -328,10 +338,14 @@ static int start_interactive( bool colors )
 			}
 		}
 		
-		linenoiseHistoryAdd( line );
+		if( is_interactive ) {
+			linenoiseHistoryAdd( line );
+		}
 				
 		if( strncasecmp( line, "quit", 4 ) == 0 ) {
-			linenoiseHistorySave( history_filename );
+			if( is_interactive ) {
+				linenoiseHistorySave( history_filename );
+			}
 			return EXIT_SUCCESS;
 		} else if( strncasecmp( line, "help", 4 ) == 0 ) {
 			print_help( );