third_party/patches/linenoise/linenoise.c.patch

--- linenoise.c.new	2015-04-13 02:38:43.000000000 -0500
+++ linenoise.c	2017-02-21 09:47:42.000000000 -0600
@@ -1,7 +1,5 @@
-/* linenoise.c -- VERSION 1.0
- *
- * Guerrilla line editing library against the idea that a line editing lib
- * needs to be 20,000 lines of C code.
+/* linenoise.c -- guerrilla line editing library against the idea that a
+ * line editing lib needs to be 20,000 lines of C code.
  *
  * You can find the latest source code at:
  *
@@ -120,6 +118,7 @@
 
 #define LINENOISE_DEFAULT_HISTORY_MAX_LEN 100
 #define LINENOISE_MAX_LINE 4096
+#define LINENOISE_TRIM_NEWLINE 0
 static char *unsupported_term[] = {"dumb","cons25","emacs",NULL};
 static linenoiseCompletionCallback *completionCallback = NULL;
 
@@ -774,6 +773,10 @@
             history_len--;
             free(history[history_len]);
             if (mlmode) linenoiseEditMoveEnd(&l);
+#if !LINENOISE_TRIM_NEWLINE
+            l.buf[l.len++] = '\n';
+            l.buf[l.len] = '\0';
+#endif
             return (int)l.len;
         case CTRL_C:     /* ctrl-c */
             errno = EAGAIN;
@@ -940,10 +943,12 @@
         /* Not a tty: read from file / pipe. */
         if (fgets(buf, buflen, stdin) == NULL) return -1;
         count = strlen(buf);
+#if LINENOISE_TRIM_NEWLINE
         if (count && buf[count-1] == '\n') {
             count--;
             buf[count] = '\0';
         }
+#endif
     } else {
         /* Interactive editing. */
         if (enableRawMode(STDIN_FILENO) == -1) return -1;
@@ -970,10 +975,12 @@
         fflush(stdout);
         if (fgets(buf,LINENOISE_MAX_LINE,stdin) == NULL) return NULL;
         len = strlen(buf);
+#if LINENOISE_TRIM_NEWLINE
         while(len && (buf[len-1] == '\n' || buf[len-1] == '\r')) {
             len--;
             buf[len] = '\0';
         }
+#endif
         return strdup(buf);
     } else {
         count = linenoiseRaw(buf,LINENOISE_MAX_LINE,prompt);
@@ -1021,12 +1028,29 @@
         memset(history,0,(sizeof(char*)*history_max_len));
     }
 
+#if LINENOISE_TRIM_NEWLINE
     /* Don't add duplicated lines. */
     if (history_len && !strcmp(history[history_len-1], line)) return 0;
 
-    /* Add an heap allocated copy of the line in the history.
-     * If we reached the max length, remove the older line. */
     linecopy = strdup(line);
+#else
+    /* Remove trailing newlines so that editing from history doesn't get all wonky. */
+    size_t line_len = strlen(line);
+    while ((line_len > 0) && (line[line_len - 1] == '\n')) {
+      --line_len;
+    }
+    linecopy = (char*) malloc(line_len + 1);
+    memcpy(linecopy, line, line_len);
+    linecopy[line_len] = '\0';
+
+    /* Don't add duplicated lines. */
+    if (history_len && !strcmp(history[history_len-1], linecopy)) {
+        free(linecopy);
+        return 0;
+    }
+#endif
+
+    /* If we reached the max length, remove the older line. */
     if (!linecopy) return 0;
     if (history_len == history_max_len) {
         free(history[0]);