From ec9d22a3062fa7a4acda70a50059df848474676e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc=20Andr=C3=A9=20Tanner?= <mat@brain-dump.org>
Date: Fri, 11 Nov 2016 14:53:20 +0100
Subject: vis: add `:set shell` option

---
 README.md  |  4 ++++
 sam.c      |  6 ++++++
 vis-cmds.c | 11 +++++++++++
 3 files changed, 21 insertions(+)

diff --git a/README.md b/README.md
index 1c7a694..58533af 100644
--- a/README.md
+++ b/README.md
@@ -404,6 +404,10 @@ Operators can be forced to work line wise by specifying `V`.
     :wq           write changes then close window
     :w            write current buffer content to file
 
+     shell      path            default $SHELL, /etc/passwd, /bin/sh
+
+       set shell to use for external commands (e.g. <, >, |)
+
      tabwidth   [1-8]           default 8
 
        set display width of a tab and number of spaces to use if
diff --git a/sam.c b/sam.c
index 2459fa5..926b056 100644
--- a/sam.c
+++ b/sam.c
@@ -197,6 +197,7 @@ typedef struct {
 } OptionDef;
 
 enum {
+	OPTION_SHELL,
 	OPTION_AUTOINDENT,
 	OPTION_EXPANDTAB,
 	OPTION_TABWIDTH,
@@ -213,6 +214,11 @@ enum {
 };
 
 static const OptionDef options[] = {
+	[OPTION_SHELL] = {
+		{ "shell" },
+		OPTION_TYPE_STRING, OPTION_FLAG_NONE,
+		"Shell to use for external commands (default: $SHELL, /etc/passwd, /bin/sh)",
+	},
 	[OPTION_AUTOINDENT] = {
 		{ "autoindent", "ai" },
 		OPTION_TYPE_BOOL, OPTION_FLAG_NONE,
diff --git a/vis-cmds.c b/vis-cmds.c
index 16debea..e6ddeb0 100644
--- a/vis-cmds.c
+++ b/vis-cmds.c
@@ -150,6 +150,17 @@ static bool cmd_set(Vis *vis, Win *win, Command *cmd, const char *argv[], Cursor
 
 	size_t opt_index = opt - options;
 	switch (opt_index) {
+	case OPTION_SHELL:
+	{
+		char *shell = strdup(arg.s);
+		if (!shell) {
+			vis_info_show(vis, "Failed to change shell");
+			return false;
+		}
+		free(vis->shell);
+		vis->shell = shell;
+		break;
+	}
 	case OPTION_EXPANDTAB:
 		vis->expandtab = arg.b;
 		break;
-- 
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