From a9dd73fb16529259bd247de77667e3920b8c62d1 Mon Sep 17 00:00:00 2001
From: Benno Schulenberg <bensberg@telfort.nl>
Date: Fri, 9 Aug 2019 14:55:06 +0200
Subject: [PATCH] new feature: allow specifying a search string to "jump to" at
 startup

The string to "jump to" is specified with +/ for a forward search
(from the top of the file), or with +? for a backward search (from
the bottom of the file).

This fulfills https://savannah.gnu.org/bugs/?54535.
Requested-by: Derek Wolfe <dwwolfe1@gmail.com>

With-help-from: Brand Huntsman <alpha@qzx.com>
---
 src/nano.c  | 24 ++++++++++++++++++++++++
 src/proto.h |  2 ++
 2 files changed, 26 insertions(+)

diff --git a/src/nano.c b/src/nano.c
index cb16a37b..7b3863fa 100644
--- a/src/nano.c
+++ b/src/nano.c
@@ -2581,9 +2581,19 @@ int main(int argc, char **argv)
 	/* Read the files mentioned on the command line into new buffers. */
 	while (optind < argc && (!openfile || read_them_all)) {
 		ssize_t givenline = 0, givencol = 0;
+		char *searchstring = NULL;
 
 		/* If there's a +LINE[,COLUMN] argument here, eat it up. */
 		if (optind < argc - 1 && argv[optind][0] == '+') {
+			if (argv[optind][1] == '/' || argv[optind][1] == '?') {
+				if (argv[optind][2]) {
+					searchstring = mallocstrcpy(NULL, &argv[optind][2]);
+					if (argv[optind][1] == '?')
+						SET(BACKWARDS_SEARCH);
+				} else
+					statusline(ALERT, _("Empty search string"));
+				optind++;
+			} else
 			if (!parse_line_column(&argv[optind++][1], &givenline, &givencol))
 				statusline(ALERT, _("Invalid line or column number"));
 		}
@@ -2600,6 +2610,20 @@ int main(int argc, char **argv)
 		/* If a position was given on the command line, go there. */
 		if (givenline != 0 || givencol != 0)
 			do_gotolinecolumn(givenline, givencol, FALSE, FALSE);
+		else if (searchstring != NULL) {
+			if (ISSET(USE_REGEXP))
+				regexp_init(searchstring);
+			if (!findnextstr(searchstring, FALSE, JUSTFIND, NULL, TRUE,
+											openfile->filetop, 0))
+				not_found_msg(searchstring);
+			else
+				wipe_statusbar();
+			if (ISSET(USE_REGEXP))
+				tidy_up_after_search();
+			free(last_search);
+			last_search = searchstring;
+			searchstring = NULL;
+		}
 #ifdef ENABLE_HISTORIES
 		else if (ISSET(POSITIONLOG) && openfile->filename[0] != '\0') {
 			ssize_t savedline, savedcol;
diff --git a/src/proto.h b/src/proto.h
index 39af51f4..aa9cd31f 100644
--- a/src/proto.h
+++ b/src/proto.h
@@ -479,6 +479,8 @@ void do_rcfiles(void);
 #endif /* ENABLE_NANORC */
 
 /* Most functions in search.c. */
+bool regexp_init(const char *regexp);
+void tidy_up_after_search(void);
 int findnextstr(const char *needle, bool whole_word_only, int modus,
 		size_t *match_len, bool skipone, const linestruct *begin, size_t begin_x);
 void do_search(void);