feat: added temperature command

.github/workflows/release.yaml

@@ -12,12 +12,12 @@ jobs:
             contents: write
         steps:
             - name: Checkout Repository
-              uses: actions/checkout@v2
+              uses: actions/checkout@v4
 
             - name: Set up Go
-              uses: actions/setup-go@v2
+              uses: actions/setup-go@v4
               with:
-                  go-version: 1.21
+                  go-version-file: './go.mod'
 
             - name: Build
               run: |

README.md

@@ -11,6 +11,7 @@ The protocol supports the following commands:
 - `network` — returns the network usage in bytes
 - `storage` — returns the storage usage in GB
 - `uptime` — returns the system uptime in seconds
+- `temperature` — returns the CPU temperature of Big and Little cores in Celsius
 
 [TODO: check if the command docs are correct]
 
@@ -74,3 +75,13 @@ $ time ( echo '<command>' | nc <node> 12345 )
 # stop and disable the systemd service on all nodes
 $ parallel --nonall --slf nodes.txt 'systemctl disable --now stats-server.service'
 ```
+
+## Credits
+
+- The shell code for the commands was originally made by [@BachoSeven](https://github.com/bachoseven)
+
+    <https://git.phc.dm.unipi.it/phc/cluster-dashboard/src/branch/main/backend/scripts>
+
+- Most of the code was initially made with the help of ChatGPT in this conversation
+
+    <https://chat.openai.com/share/40247aa0-76e9-4d9a-b0fa-356a5f51f208>

main.go

@@ -25,12 +25,54 @@ ExecStart=/usr/local/bin/stats-server serve
 WantedBy=default.target
 `)
 
+// cmdStrHelper removes indentation and newlines from a shell command string for
+// better readability.
+//
+// Precisely, it first trims the string, then splits it by newlines, then trims
+// each line, then joins them back with a space.
+func cmdStrHelper(command string) string {
+	lines := strings.Split(strings.TrimSpace(command), "\n")
+	for i, line := range lines {
+		lines[i] = strings.TrimSpace(line)
+	}
+
+	return strings.Join(lines, " ")
+}
+
+// commands is a map of commands that can be run on the server, originally made
+// by @BachoSeven
 var commands = map[string]string{
-	"cpu":     `top -bn1 | grep "Cpu(s)" | sed "s/.*, *\([0-9.]*\)%* id.*/\1/" | sed "s/^/100 - /" | bc`,
-	"memory":  `free -m | awk '/Mem/{print $3 " " $2}'`,
-	"network": `cat /sys/class/net/[e]*/statistics/{r,t}x_bytes`,
-	"storage": `df -Ph | grep mmcblk0p5 | awk '{print $2 " " $3}' | sed 's/G//g'`,
-	"uptime":  `cut -f1 -d. /proc/uptime`,
+	"cpu": cmdStrHelper(`
+		top -bn1
+		| grep "Cpu(s)"
+		| sed "s/.*, *\([0-9.]*\)%* id.*/\1/"
+		| sed "s/^/100 - /"
+		| bc
+	`),
+	"memory": cmdStrHelper(`
+		free -m
+		| awk '/Mem/{print $3 " " $2}'
+	`),
+	"network": cmdStrHelper(`
+		cat /sys/class/net/[e]*/statistics/{r,t}x_bytes
+	`),
+	"storage": cmdStrHelper(`
+		df -Ph
+		| grep mmcblk0p5
+		| awk '{print $2 " " $3}'
+		| sed 's/G//g'
+	`),
+	"uptime": cmdStrHelper(`
+		cut -f1 -d. /proc/uptime
+	`),
+	"temperature": cmdStrHelper(`
+		paste
+			<(cat /sys/class/thermal/thermal_zone*/type)
+			<(awk
+				'{printf "%.3f\n", $1/1000}'
+				/sys/class/thermal/thermal_zone*/temp
+			)
+	`),
 }
 
 func init() {