--- a/src/ex_cmds.c 2016-09-21 15:16:13.032570431 -0700

+++ b/src/ex_cmds.c 2016-09-21 15:16:13.055466074 -0700

@@ -6276,6 +6276,8 @@

#ifdef FEAT_FOLDING

int old_KeyTyped = KeyTyped;

#endif

+ int nohelp = FALSE, nominhelp = FALSE;

+ char_u *mhf = NULL;

if (eap != NULL)

{

@@ -6327,6 +6329,23 @@

n = find_help_tags(arg, &num_matches, &matches,

eap != NULL && eap->forceit);

+ /*

+ * If we didn't find the help topic, check to see whether 'helpfile'

+ * (typically $VIMRUNTIME/doc/help.txt) exists. If not, then we'll send the

+ * user to the minimized help file delivered with the core vim package which

+ * explains why there's no help and how to get it.

+ */

+ if (num_matches == 0 && mch_access((char *)p_hf, F_OK) < 0) {

+ nohelp = TRUE;

+ mhf = alloc(MAXPATHL);

+ STRNCPY(mhf, p_hf, MAXPATHL - 1);

+ mhf[STRLEN(mhf) - 8] = '\0';

+ STRNCAT(mhf, "help_minimized.txt", MAXPATHL - STRLEN(mhf) - 1);

+

+ if (mch_access((char *)mhf, F_OK) < 0)

+ nominhelp = TRUE;

+ }

+

i = 0;

#ifdef FEAT_MULTI_LANG

if (n != FAIL && lang != NULL)

@@ -6339,7 +6358,7 @@

break;

}

#endif

- if (i >= num_matches || n == FAIL)

+ if (!nohelp && i >= num_matches || n == FAIL)

{

#ifdef FEAT_MULTI_LANG

if (lang != NULL)

@@ -6352,9 +6371,11 @@

return;

}

- /* The first match (in the requested language) is the best match. */

- tag = vim_strsave(matches[i]);

- FreeWild(num_matches, matches);

+ if (!nohelp) {

+ /* The first match (in the requested language) is the best match. */

+ tag = vim_strsave(matches[i]);

+ FreeWild(num_matches, matches);

+ }

#ifdef FEAT_GUI

need_mouse_correct = TRUE;

@@ -6386,12 +6407,14 @@

* There is no help window yet.

* Try to open the file specified by the "helpfile" option.

*/

- if ((helpfd = mch_fopen((char *)p_hf, READBIN)) == NULL)

- {

- smsg((char_u *)_("Sorry, help file \"%s\" not found"), p_hf);

- goto erret;

+ if (!nohelp || nominhelp) {

+ if ((helpfd = mch_fopen((char *)p_hf, READBIN)) == NULL)

+ {

+ smsg((char_u *)_("Sorry, help file \"%s\" not found"), p_hf);

+ goto erret;

+ }

+ fclose(helpfd);

}

- fclose(helpfd);

#ifdef FEAT_WINDOWS

/* Split off help window; put it at far top if no position

@@ -6420,7 +6443,7 @@

* Set the alternate file to the previously edited file.

*/

alt_fnum = curbuf->b_fnum;

- (void)do_ecmd(0, NULL, NULL, NULL, ECMD_LASTL,

+ (void)do_ecmd(0, mhf, NULL, NULL, ECMD_LASTL,

ECMD_HIDE + ECMD_SET_HELP,

#ifdef FEAT_WINDOWS

NULL /* buffer is still open, don't store info */

@@ -6443,7 +6466,7 @@

KeyTyped = old_KeyTyped;

#endif

- if (tag != NULL)

+ if (!nohelp && tag != NULL)

do_tag(tag, DT_HELP, 1, FALSE, TRUE);

/* Delete the empty buffer if we're not using it. Careful: autocommands

@@ -6461,7 +6484,8 @@

curwin->w_alt_fnum = alt_fnum;

erret:

- vim_free(tag);

+ if (!nohelp)

+ vim_free(tag);

}

/*