Merge pull request #4247 from watiko/vim-7.4.903

vim-patch:7.4.{831,832,845,903}

src/nvim/os/env.c

@@ -262,8 +262,25 @@ void expand_env_esc(char_u *srcp, char_u *dst, int dstlen, bool esc, bool one,
     startstr_len = (int)STRLEN(startstr);
 
   src = skipwhite(srcp);
-  --dstlen;  // leave one char space for "\,"
+  dstlen--;  // leave one char space for "\,"
   while (*src && dstlen > 0) {
+    // Skip over `=expr`.
+    if (src[0] == '`' && src[1] == '=') {
+      var = src;
+      src += 2;
+      (void)skip_expr(&src);
+      if (*src == '`') {
+        src++;
+      }
+      size_t len = (size_t)(src - var);
+      if (len > (size_t)dstlen) {
+        len = (size_t)dstlen;
+      }
+      memcpy((char *)dst, (char *)var, len);
+      dst += len;
+      dstlen -= (int)len;
+      continue;
+    }
     copy_char = true;
     if ((*src == '$') || (*src == '~' && at_start)) {
       mustfree = false;

src/nvim/path.c

@@ -556,8 +556,9 @@ static size_t do_path_expand(garray_T *gap, const char_u *path,
       return 0;
   }
 
-  /* make room for file name */
+  // Make room for file name.  When doing encoding conversion the actual
-  buf = xmalloc(STRLEN(path) + BASENAMELEN + 5);
+  // length may be quite a bit longer, thus use the maximum possible length.
+  buf = xmalloc(MAXPATHL);
 
   /*
    * Find the first part in the path name that contains a wildcard.
@@ -1158,12 +1159,17 @@ int gen_expand_wildcards(int num_pat, char_u **pat, int *num_file,
     add_pat = -1;
     p = pat[i];
 
-    if (vim_backtick(p))
+    if (vim_backtick(p)) {
       add_pat = expand_backtick(&ga, p, flags);
-    else {
+      if (add_pat == -1) {
-      /*
+        recursive = false;
-       * First expand environment variables, "~/" and "~user/".
+        FreeWild(ga.ga_len, (char_u **)ga.ga_data);
-       */
+        *num_file = 0;
+        *file = NULL;
+        return FAIL;
+      }
+    } else {
+      // First expand environment variables, "~/" and "~user/".
       if (has_env_var(p) || *p == '~') {
         p = expand_env_save_opt(p, true);
         if (p == NULL)
@@ -1246,13 +1252,10 @@ static int vim_backtick(char_u *p)
   return *p == '`' && *(p + 1) != NUL && *(p + STRLEN(p) - 1) == '`';
 }
 
-/*
+// Expand an item in `backticks` by executing it as a command.
- * Expand an item in `backticks` by executing it as a command.
+// Currently only works when pat[] starts and ends with a `.
- * Currently only works when pat[] starts and ends with a `.
+// Returns number of file names found, -1 if an error is encountered.
- * Returns number of file names found.
+static int expand_backtick(
- */
-static int 
-expand_backtick (
     garray_T *gap,
     char_u *pat,
     int flags              /* EW_* flags */
@@ -1273,8 +1276,9 @@ expand_backtick (
     buffer = get_cmd_output(cmd, NULL,
         (flags & EW_SILENT) ? kShellOptSilent : 0, NULL);
   xfree(cmd);
-  if (buffer == NULL)
+  if (buffer == NULL) {
-    return 0;
+    return -1;
+  }
 
   cmd = buffer;
   while (*cmd != NUL) {

src/nvim/version.c

@@ -387,7 +387,7 @@ static int included_patches[] = {
   // 906 NA
   // 905,
   // 904,
-  // 903,
+  903,
   // 902 NA
   // 901,
   // 900 NA
@@ -445,7 +445,7 @@ static int included_patches[] = {
   848,
   847,
   // 846 NA
-  // 845,
+  845,
   844,
   843,
   // 842 NA
@@ -458,8 +458,8 @@ static int included_patches[] = {
   835,
   834,
   833,
-  // 832,
+  832,
-  // 831,
+  831,
   830,
   // 829 NA
   828,