Merge pull request #977 from splinterofchaos/fish

vim-patch:7.4.276

src/nvim/ex_cmds.c

@@ -1307,52 +1307,58 @@ do_shell (
   apply_autocmds(EVENT_SHELLCMDPOST, NULL, NULL, FALSE, curbuf);
 }
 
-/*
- * Create a shell command from a command string, input redirection file and
- * output redirection file.
- * Returns an allocated string with the shell command.
- */
-char_u *
-make_filter_cmd (
-    char_u *cmd,               /* command */
-    char_u *itmp,              /* NULL or name of input file */
-    char_u *otmp              /* NULL or name of output file */
-)
+/// Create a shell command from a command string, input redirection file and
+/// output redirection file.
+///
+/// @param cmd  Command to execute.
+/// @param itmp NULL or the input file.
+/// @param otmp NULL or the output file.
+/// @returns an allocated string with the shell command.
+char_u *make_filter_cmd(char_u *cmd, char_u *itmp, char_u *otmp)
 {
-  size_t len = STRLEN(cmd) + 3;                        /* "()" + NUL */
+  bool is_fish_shell =
+#if defined(UNIX)
+    STRNCMP(invocation_path_tail(p_sh, NULL), "fish", 4) == 0;
+#else
+    false;
+#endif
+
+  size_t len = STRLEN(cmd) + 1;  // At least enough space for cmd + NULL.
+  
+  len += is_fish_shell ?  sizeof("begin; ""; end") - 1
+                       :  sizeof("("")") - 1;
+
   if (itmp != NULL)
-    len += STRLEN(itmp) + 9;                    /* " { < " + " } " */
+    len += STRLEN(itmp) + sizeof(" { "" < "" } ") - 1;
   if (otmp != NULL)
-    len += STRLEN(otmp) + STRLEN(p_srr) + 2;     /* "  " */
+    len += STRLEN(otmp) + STRLEN(p_srr) + 2;  // two extra spaces ("  "),
   char_u *buf = xmalloc(len);
 
 #if defined(UNIX)
-  /*
-   * Put braces around the command (for concatenated commands) when
-   * redirecting input and/or output.
-   */
-  if (itmp != NULL || otmp != NULL)
-    vim_snprintf((char *)buf, len, "(%s)", (char *)cmd);
-  else
+  // Put delimiters around the command (for concatenated commands) when
+  // redirecting input and/or output.
+  if (itmp != NULL || otmp != NULL) {
+    char *fmt = is_fish_shell ? "begin; %s; end"
+                              :       "(%s)";
+    vim_snprintf((char *)buf, len, fmt, (char *)cmd);
+  } else {
     STRCPY(buf, cmd);
+  }
+
   if (itmp != NULL) {
     STRCAT(buf, " < ");
     STRCAT(buf, itmp);
   }
 #else
-  /*
-   * for shells that don't understand braces around commands, at least allow
-   * the use of commands in a pipe.
-   */
+  // For shells that don't understand braces around commands, at least allow
+  // the use of commands in a pipe.
   STRCPY(buf, cmd);
   if (itmp != NULL) {
     char_u  *p;
 
-    /*
-     * If there is a pipe, we have to put the '<' in front of it.
-     * Don't do this when 'shellquote' is not empty, otherwise the
-     * redirection would be inside the quotes.
-     */
+    // If there is a pipe, we have to put the '<' in front of it.
+    // Don't do this when 'shellquote' is not empty, otherwise the
+    // redirection would be inside the quotes.
     if (*p_shq == NUL) {
       p = vim_strchr(buf, '|');
       if (p != NULL)
@@ -1363,7 +1369,7 @@ make_filter_cmd (
     if (*p_shq == NUL) {
       p = vim_strchr(cmd, '|');
       if (p != NULL) {
-        STRCAT(buf, " ");           /* insert a space before the '|' for DOS */
+        STRCAT(buf, " ");  // Insert a space before the '|' for DOS
         STRCAT(buf, p);
       }
     }

src/nvim/option.c

@@ -2359,7 +2359,6 @@ void set_init_3(void)
    * This is done after other initializations, where 'shell' might have been
    * set, but only if they have not been set before.
    */
-  char_u  *p;
   int idx_srr;
   int do_srr;
   int idx_sp;
@@ -2376,28 +2375,10 @@ void set_init_3(void)
   else
     do_sp = !(options[idx_sp].flags & P_WAS_SET);
 
-  /*
-   * Isolate the name of the shell:
-   * - Skip beyond any path.  E.g., "/usr/bin/csh -f" -> "csh -f".
-   * - Remove any argument.  E.g., "csh -f" -> "csh".
-   * But don't allow a space in the path, so that this works:
-   *   "/usr/bin/csh --rcfile ~/.cshrc"
-   * But don't do that for Windows, it's common to have a space in the path.
-   */
-  p = skiptowhite(p_sh);
-  if (*p == NUL) {
-    /* No white space, use the tail. */
-    p = vim_strsave(path_tail(p_sh));
-  } else {
-    char_u  *p1, *p2;
+  size_t len = 0;
+  char_u *p = (char_u *)invocation_path_tail(p_sh, &len);
+  p = vim_strnsave(p, len);
 
-    /* Find the last path separator before the space. */
-    p1 = p_sh;
-    for (p2 = p_sh; p2 < p; mb_ptr_adv(p2))
-      if (vim_ispathsep(*p2))
-        p1 = p2 + 1;
-    p = vim_strnsave(p1, (int)(p - p1));
-  }
   {
     /*
      * Default for p_sp is "| tee", for p_srr is ">".
@@ -2421,6 +2402,7 @@ void set_init_3(void)
                       || fnamecmp(p, "zsh") == 0
                       || fnamecmp(p, "zsh-beta") == 0
                       || fnamecmp(p, "bash") == 0
+                      || fnamecmp(p, "fish") == 0
                       ) {
       if (do_sp) {
         p_sp = (char_u *)"2>&1| tee";

src/nvim/path.c

@@ -131,6 +131,35 @@ char_u *path_tail_with_sep(char_u *fname)
   return tail;
 }
 
+/// Finds the path tail (or executable) in an invocation.
+///
+/// @param[in]  invocation A program invocation in the form:
+///                        "path/to/exe [args]".
+/// @param[out] len Stores the length of the executable name.
+///
+/// @post if `len` is not null, stores the length of the executable name.
+///
+/// @return The position of the last path separator + 1.
+const char_u *invocation_path_tail(const char_u *invocation, size_t *len)
+    FUNC_ATTR_NONNULL_RET FUNC_ATTR_NONNULL_ARG(1)
+{
+  const char_u *tail = get_past_head((char_u *) invocation);
+  const char_u *p = tail;
+  while (*p != NUL && *p != ' ') {
+    bool was_sep = vim_ispathsep_nocolon(*p);
+    mb_ptr_adv(p);
+    if (was_sep) {
+      tail = p;  // Now tail points one past the separator.
+    }
+  }
+
+  if (len != NULL) {
+    *len = (size_t)(p - tail);
+  }
+
+  return tail;
+}
+
 /// Get the next path component of a path name.
 ///
 /// @param fname A file path. (Must be != NULL.)

src/nvim/version.c

@@ -319,7 +319,7 @@ static int included_patches[] = {
   //279,
   //278,
   277,
-  //276,
+  276,
   275,
   274,
   //273 NA

test/unit/path_spec.moon

@@ -114,6 +114,65 @@ describe 'path function', ->
     it 'returns the whole file name if there is no separator', ->
       eq 'file.txt', path_tail_with_sep 'file.txt'
 
+  describe 'invocation_path_tail', ->
+    -- Returns the path tail and length (out param) of the tail.
+    -- Does not convert the tail from C-pointer to lua string for use with
+    -- strcmp.
+    invocation_path_tail = (invk) ->
+      plen = ffi.new 'size_t[?]', 1
+      ptail = path.invocation_path_tail (to_cstr invk), plen
+      neq NULL, ptail
+
+      -- it does not change the output if len==NULL
+      tail2 = path.invocation_path_tail (to_cstr invk), NULL
+      neq NULL, tail2
+      eq (ffi.string ptail), (ffi.string tail2)
+
+      ptail, plen[0]
+
+    -- This test mimics the intended use in C.
+    compare = (base, pinvk, len) ->
+      eq 0, (ffi.C.strncmp (to_cstr base), pinvk, len)
+
+    it 'returns the executable name of an invocation given a relative invocation', ->
+      invk, len = invocation_path_tail 'directory/exe a b c'
+      compare "exe a b c", invk, len
+      eq 3, len
+
+    it 'returns the executable name of an invocation given an absolute invocation', ->
+      if ffi.os == 'Windows'
+        invk, len = invocation_path_tail 'C:\\Users\\anyone\\Program Files\\z a b'
+        compare 'z a b', invk, len
+        eq 1, len
+      else
+        invk, len = invocation_path_tail '/usr/bin/z a b'
+        compare 'z a b', invk, len
+        eq 1, len
+
+    it 'does not count arguments to the executable as part of its path', ->
+      invk, len = invocation_path_tail 'exe a/b\\c'
+      compare "exe a/b\\c", invk, len
+      eq 3, len
+
+    it 'only accepts whitespace as a terminator for the executable name', ->
+      invk, len = invocation_path_tail 'exe-a+b_c[]()|#!@$%^&*'
+      eq 'exe-a+b_c[]()|#!@$%^&*', (ffi.string invk)
+
+    it 'is equivalent to path_tail when args do not contain a path separator', ->
+      ptail = path.path_tail to_cstr "a/b/c x y z"
+      neq NULL, ptail
+      tail = ffi.string ptail
+
+      invk, len = invocation_path_tail "a/b/c x y z"
+      eq tail, ffi.string invk
+
+    it 'is not equivalent to path_tail when args contain a path separator', ->
+      ptail = path.path_tail to_cstr "a/b/c x y/z"
+      neq NULL, ptail
+
+      invk, len = invocation_path_tail "a/b/c x y/z"
+      neq (ffi.string ptail), (ffi.string invk)
+
   describe 'path_next_component', ->
     path_next_component = (file) ->
       res = path.path_next_component (to_cstr file)