Test setup script

.github/workflows/ci.yml

@@ -24,20 +24,9 @@ jobs:
         sudo apt-get install -y linux-image-$(uname -r) linux-modules-extra-$(uname -r)
     - name: Setup user groups
       run: |
-        echo KERNEL==\"uinput\", SUBSYSTEM==\"misc\" GROUP=\"docker\", MODE=\"0666\" | sudo tee /etc/udev/rules.d/99-$USER.rules
-        echo KERNEL==\"event[0-9]*\", SUBSYSTEM==\"input\" GROUP=\"docker\", MODE=\"0666\" | sudo tee -a /etc/udev/rules.d/99-$USER.rules
-        echo SUBSYSTEM==\"video4linux\" GROUP=\"docker\", MODE=\"0666\" | sudo tee -a /etc/udev/rules.d/99-$USER.rules
-        echo KERNEL==\"gpiochip[0-9]*\", SUBSYSTEM==\"gpio\", GROUP=\"docker\", MODE=\"0666\" | sudo tee -a /etc/udev/rules.d/99-$USER.rules
-        sudo udevadm control --reload-rules
-        sudo udevadm trigger
-        sudo modprobe -a uinput
-        sudo modprobe vivid n_devs=1 node_types=0xe1d3d vid_cap_nr=190 vid_out_nr=191 meta_cap_nr=192 meta_out_nr=193
-        sudo modprobe gpio-sim
-        sudo modprobe gpio-aggregator
-        sudo python scripts/setup-gpio-sim.py
+        sudo python scripts/test_setup.py
         ls -lsa /dev/video* /dev/uinput /dev/gpio* /dev/inp*
 
-
     - name: Set up Python ${{ matrix.python-version }}
       id: setuppy
       uses: actions/setup-python@v5

scripts/test_setup.py

@@ -0,0 +1,133 @@
+from pathlib import Path
+from subprocess import run
+from sys import argv
+
+user_group = None if len(argv) < 2 else argv[1]
+input_group = user_group or "input"
+video_group = user_group or "video"
+
+RULES = f"""\
+KERNEL=="uinput", SUBSYSTEM=="misc" GROUP="{input_group}", MODE="0666"
+KERNEL=="event[0-9]*", SUBSYSTEM=="input" GROUP="{input_group}", MODE="0666"
+
+KERNEL=="uleds", GROUP="input", MODE="0664"
+SUBSYSTEM=="leds", ACTION=="add", RUN+="/bin/chmod -R g=u,o=u /sys%p"
+SUBSYSTEM=="leds", ACTION=="change", ENV{{TRIGGER}}!="none", RUN+="/bin/chmod -R g=u,o=u /sys%p"
+
+SUBSYSTEM=="video4linux" GROUP="{video_group}", MODE="0666"
+
+KERNEL=="gpiochip[0-9]*", SUBSYSTEM=="gpio", GROUP="{input_group}", MODE="0666"
+"""
+
+MODULES = {
+    "uinput": "",
+    "uleds": "",
+    "gpio-sim": "",
+    "vivid": "n_devs=1 node_types=0xe1d3d vid_cap_nr=190 vid_out_nr=191 meta_cap_nr=192 meta_out_nr=193",
+    "snd_seq_midi": "",
+}
+
+
+def loaded_modules():
+    return {line.split()[0] for line in Path("/proc/modules").read_text().splitlines()}
+
+
+LOADED_MODULES = loaded_modules()
+
+
+def handle_rules():
+    print("Checking rules")
+    rules = Path("/etc/udev/rules.d/99-linuxpy.rules")
+    if rules.exists() and RULES in rules.read_text():
+        print(" Already prepared")
+    else:
+        print(f"  Writing rules {rules}")
+        rules.write_text(RULES)
+        print("  Reloading rules")
+        run("udevadm control --reload-rules".split())
+        run("udevadm trigger".split())
+
+
+def handle_module(mod_name):
+    print(f"Handling {mod_name}")
+    if mod_name in LOADED_MODULES:
+        print(f"  Unloading {mod_name}")
+        run(f"modprobe -r {mod_name}".split())
+    args = MODULES[mod_name]
+    print(f"  Loading {mod_name}")
+    run(f"modprobe {mod_name} {args}".split())
+
+
+def handle_gpio_sim():
+    print("Preparing GPIO sim")
+    mounts = Path("/proc/mounts")
+    for dtype, mpath, fstype, *_ in mounts.read_text().splitlines():
+        if dtype == "configfs" and fstype == "configfs":
+            CONFIGFS_PATH = Path(mpath)
+    else:
+        CONFIGFS_PATH = Path("/sys/kernel/config/gpio-sim")
+
+    def Line(name, direction=None):
+        result = {"name": name}
+        if direction:
+            result["hog"] = {"name": f"{name}-hog", "direction": direction}
+        return result
+
+    cfg = {
+        "name": "chip99",
+        "banks": [
+            {
+                "lines": [
+                    Line("L-I0"),
+                    Line("L-I1"),
+                    Line("L-I2", "input"),
+                    Line("L-O0", "output-high"),
+                    Line("L-O1", "output-low"),
+                    Line("L-O2"),
+                ]
+            },
+        ],
+    }
+
+    def mkdir(path):
+        print(f"  Creating {path}")
+        path.mkdir()
+
+    path = CONFIGFS_PATH / cfg["name"]
+    live = path / "live"
+
+    # clean up first
+    if path.exists():
+        live.write_text("0")
+        for directory, _, _ in path.walk(top_down=False):
+            directory.rmdir()
+
+    mkdir(path)
+    for bank_id, bank in enumerate(cfg["banks"]):
+        lines = bank["lines"]
+
+        bpath = path / f"gpio-bank{bank_id}"
+        mkdir(bpath)
+        blabel = bank.get("name", f"gpio-sim-bank{bank_id}")
+
+        (bpath / "num_lines").write_text("16")
+        (bpath / "label").write_text(blabel)
+        for line_id, line in enumerate(lines):
+            lpath = bpath / f"line{line_id}"
+            mkdir(lpath)
+            (lpath / "name").write_text(line.get("name", f"L-{line_id}"))
+            if hog := line.get("hog"):
+                hpath = lpath / "hog"
+                mkdir(hpath)
+                (hpath / "name").write_text(hog["name"])
+                (hpath / "direction").write_text(hog["direction"])
+
+    live.write_text("1")
+
+
+handle_rules()
+
+for mod_name in MODULES:
+    handle_module(mod_name)
+
+handle_gpio_sim()