vis: move file name and word completion logic to a shell script

The shell script should be reviewed for quoting issues, currently
it allows command injections as in:

 $ vis-complete "'; rm -f some-file; echo "

However it is intended for interactive usage and from within vis
it is only ever called with a valid completion prefix.

The file name completion logic now supports nested directories.

Close #347

4 files changed, 42 insertions, 4 deletions

diff --git a/Makefile b/Makefile
index 9b241c8..ee85e9a 100644
--- a/Makefile
+++ b/Makefile
@@ -87,6 +87,8 @@ install: vis vis-menu
 	@chmod 755 ${DESTDIR}${PREFIX}/bin/vis-open
 	@cp -f vis-clipboard ${DESTDIR}${PREFIX}/bin
 	@chmod 755 ${DESTDIR}${PREFIX}/bin/vis-clipboard
+	@cp -f vis-complete ${DESTDIR}${PREFIX}/bin
+	@chmod 755 ${DESTDIR}${PREFIX}/bin/vis-complete
 	@test ${CONFIG_LUA} -eq 0 || { \
 		echo installing support files to ${DESTDIR}${SHAREPREFIX}/vis; \
 		mkdir -p ${DESTDIR}${SHAREPREFIX}/vis; \
diff --git a/main.c b/main.c
index 485478e..b0b932d 100644
--- a/main.c
+++ b/main.c
@@ -2131,8 +2131,7 @@ static const char *complete_word(Vis *vis, const char *keys, const Arg *arg) {
 	Buffer cmd;
 	buffer_init(&cmd);
 	char *prefix = get_completion_prefix(vis);
-	if (prefix && buffer_printf(&cmd, "tr -cs '[:alnum:]_' '\n' | grep '^%s.' | sort -u | "
-	    VIS_MENU " -b | sed 's/^%s//' | tr -d '\n'", prefix, prefix)) {
+	if (prefix && buffer_printf(&cmd, VIS_COMPLETE " --word '%s'", prefix)) {
 		Filerange all = text_range_new(0, text_size(txt));
 		insert_dialog_selection(vis, &all, (const char*[]){ buffer_content0(&cmd), NULL });
 	}
@@ -2145,8 +2144,7 @@ static const char *complete_filename(Vis *vis, const char *keys, const Arg *arg)
 	Buffer cmd;
 	buffer_init(&cmd);
 	char *prefix = get_completion_prefix(vis);
-	if (prefix && buffer_printf(&cmd, "ls -1 | grep '^%s.' | sort | "
-	    VIS_MENU " -b | sed 's/^%s//' | tr -d '\n'", prefix, prefix)) {
+	if (prefix && buffer_printf(&cmd, VIS_COMPLETE " --file '%s'", prefix)) {
 		Filerange empty = text_range_new(0, 0);
 		insert_dialog_selection(vis, &empty, (const char*[]){ buffer_content0(&cmd), NULL });
 	}
diff --git a/vis-complete b/vis-complete
new file mode 100755
index 0000000..29dc457
--- /dev/null
+++ b/vis-complete
@@ -0,0 +1,35 @@
+#!/bin/sh
+set -e
+
+PATTERN=""
+COMPLETE_WORD=0
+
+while [ $# -gt 0 ]; do
+	case "$1" in
+	-h|--help)
+		echo "usage: $(basename "$0") [-h] [--file|--word] [pattern]"
+		exit 0;
+		;;
+	--file)
+		shift
+		;;
+	--word)
+		COMPLETE_WORD=1
+		shift
+		;;
+	*)
+		PATTERN="$1"
+		break
+		;;
+	esac
+done
+
+if [ $COMPLETE_WORD = 1 ]; then
+	CMD=$(printf "tr -cs '[:alnum:]_' '\n' | grep '^%s.' | sort -u" "$PATTERN")
+else
+	CMD=$(printf "find . ! -path '*/\.*' -a -path './%s*' | cut -b 3- | sort" "$PATTERN")
+fi
+
+CMD=$(printf "$CMD | vis-menu -b | sed 's/^%s//' | tr -d '\n'" "$PATTERN")
+
+exec /bin/sh -c "$CMD"
diff --git a/vis.h b/vis.h
index 91f9868..a9ffb90 100644
--- a/vis.h
+++ b/vis.h
@@ -23,6 +23,9 @@ typedef struct Win Win;
 #ifndef VIS_CLIPBOARD
 #define VIS_CLIPBOARD "vis-clipboard"
 #endif
+#ifndef VIS_COMPLETE
+#define VIS_COMPLETE "vis-complete"
+#endif
 
 typedef struct {
 	void (*vis_init)(Vis*);