Add post-run-command notify implementation for linux

README.md

@@ -159,9 +159,12 @@ package may be used to parse the JSON file output.
 
 First install the example notification command with `go get gotest.tools/gotestsum/contrib/notify`.
 The command will be downloaded to `$GOPATH/bin` as `notify`. Note that this
-example `notify` command only works on macOS with
+example `notify` command only works on Linux with `notify-send` and on macOS with
 [terminal-notifer](https://github.com/julienXX/terminal-notifier) installed.
 
+On Linux, you need to have some "test-pass" and "test-fail" icons installed in your icon theme.
+Some sample icons can be found in `contrib/notify`, and can be installed with `make install`.
+
 ```
 gotestsum --post-run-command notify
 ```

contrib/notify/.gitignore

@@ -0,0 +1 @@
+notify

contrib/notify/Makefile

@@ -0,0 +1,13 @@
+GO = go
+INSTALL = install
+
+ICONS = icons/test-pass.svg icons/test-fail.svg
+ICONDIR = $(HOME)/.icons  # or /usr/share/icons
+
+build:
+	$(GO) build
+
+install: $(ICONS)
+	$(GO) install
+	$(INSTALL) -d $(ICONDIR)
+	$(INSTALL) $^ $(ICONDIR)

contrib/notify/icons/README.html

@@ -0,0 +1 @@
+<a href="https://www.vecteezy.com/free-vector/pass-fail">Pass Fail Vectors by Vecteezy</a>

contrib/notify/notify_linux.go

@@ -0,0 +1,60 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"strconv"
+)
+
+func main() {
+	total := envInt("TOTAL")
+	skipped := envInt("SKIPPED")
+	failed := envInt("FAILED")
+	errors := envInt("ERRORS")
+
+	icon := "test-pass"
+	title := "Passed"
+	switch {
+	case errors > 0:
+		icon = "dialog-warning"
+		title = "Errored"
+	case failed > 0:
+		icon = "test-fail"
+		title = "Failed"
+	case skipped > 0:
+		title = "Passed with skipped"
+	}
+
+	subtitle := fmt.Sprintf("%d Tests Run", total)
+	if errors > 0 {
+		subtitle += fmt.Sprintf(", %d Errored", errors)
+	}
+	if failed > 0 {
+		subtitle += fmt.Sprintf(", %d Failed", failed)
+	}
+	if skipped > 0 {
+		subtitle += fmt.Sprintf(", %d Skipped", skipped)
+	}
+
+	args := []string{
+		"--icon", icon,
+		title,
+		subtitle,
+	}
+	log.Printf("notify-send %#v", args)
+	err := exec.Command("notify-send", args...).Run()
+	if err != nil {
+		log.Fatalf("Failed to exec: %v", err)
+	}
+}
+
+func envInt(name string) int {
+	val := os.Getenv("TESTS_" + name)
+	n, err := strconv.Atoi(val)
+	if err != nil {
+		return 0
+	}
+	return n
+}