nixos-config/modules/cli/shlvl.patch

From 9fd668e356c3b89601109d6f1f53e5843af00af4 Mon Sep 17 00:00:00 2001
From: Sean Buckley <sean.bck@gmail.com>
Date: Tue, 7 Dec 2021 16:18:40 -0500
Subject: [PATCH] add segment-shlvl

---
 main.go          |  1 +
 segment-shlvl.go | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100644 segment-shlvl.go

diff --git a/main.go b/main.go
index 02f4a4a..2bd111e 100644
--- a/main.go
+++ b/main.go
@@ -97,6 +97,7 @@ var modules = map[string]func(*powerline) []pwl.Segment{
 	"root":                segmentRoot,
 	"shell-var":           segmentShellVar,
 	"shenv":               segmentShEnv,
+	"shlvl":               segmentShlvl,
 	"ssh":                 segmentSSH,
 	"termtitle":           segmentTermTitle,
 	"terraform-workspace": segmentTerraformWorkspace,
diff --git a/segment-shlvl.go b/segment-shlvl.go
new file mode 100644
index 0000000..d8bba7d
--- /dev/null
+++ b/segment-shlvl.go
@@ -0,0 +1,23 @@
+package main
+
+import (
+	pwl "github.com/justjanne/powerline-go/powerline"
+	"os"
+	"strconv"
+)
+
+func segmentShlvl(p *powerline) []pwl.Segment {
+
+	level, _ := os.LookupEnv("SHLVL")
+	leveli, err := strconv.Atoi(level)
+
+	if err != nil || leveli < 1 {
+		return []pwl.Segment{}
+	}
+	return []pwl.Segment{{
+		Name:       "shlvl",
+		Content:    "\uE7A2 " + level,
+		Foreground: 231,
+		Background: 55,
+	}}
+}