build: allow to define additional configs

asu/build.py

@@ -150,6 +150,23 @@ def build(build_request: BuildRequest, job=None):
             },
         )
 
+    if build_request.configs:
+        log.debug("Found extra configs")
+        configs = ""
+        for config in build_request.configs:
+            configs += f"{config}\n"
+
+        (bin_dir / ".config_local").write_text(configs)
+
+        mounts.append(
+            {
+                "type": "bind",
+                "source": str(bin_dir / ".config_local"),
+                "target": "/builder/.config_local",
+                "read_only": True,
+            }
+        )
+
     log.debug("Mounts: %s", mounts)
 
     container = podman.containers.create(
@@ -243,6 +260,21 @@ def build(build_request: BuildRequest, job=None):
     packages_hash: str = get_packages_hash(manifest.keys())
     log.debug(f"Packages Hash: {packages_hash}")
 
+    if build_request.configs:
+        log.info("Appling local configs")
+        returncode, job.meta["stdout"], job.meta["stderr"] = run_cmd(
+            container,
+            [
+                "sh",
+                "-c",
+                (
+                    "for config in $(grep '#' .config_local | awk '{print $2}'); do sed -i 's/'$config'.*//' .config ; done; cat .config_local >> .config"
+                ),
+            ],
+        )
+        if returncode:
+            report_error(job, "Could not apply local configs")
+
     job.meta["build_cmd"] = [
         "make",
         "image",

asu/build_request.py

@@ -6,6 +6,9 @@
 STRING_PATTERN = r"^[\w.,-]*$"
 TARGET_PATTERN = r"^[\w]*/[\w]*$"
 PKG_VERSION_PATTERN = r"^[\w.,~-]*$"
+CONFIG_PATTERN = (
+    r"^(# CONFIG_[\w_.-]+ is not set|CONFIG_[\w_.-]+=([\w_.-]+$|\"[^\"][\w_.-]+\"))$"
+)
 
 
 class BuildRequest(BaseModel):
@@ -158,3 +161,21 @@ class BuildRequest(BaseModel):
             """.strip(),
         ),
     ] = None
+    configs: Annotated[
+        list[Annotated[str, Field(pattern=CONFIG_PATTERN)]],
+        Field(
+            examples=[
+                [
+                    "CONFIG_VERSION_DIST=MyRouterOS",
+                    "CONFIG_VERSION_NUMBER=1.6",
+                    "CONFIG_TARGET_ROOTFS_TARGZ=y",
+                    "CONFIG_TARGET_ROOTFS_JFFS2=y",
+                    "# CONFIG_TARGET_ROOTFS_SQUASHFS is not set",
+                ]
+            ],
+            description="""
+                List of configs, only the few ones not related to kernel/packages 
+                as they will not be recompiled.
+            """.strip(),
+        ),
+    ] = []

asu/config.py

@@ -82,6 +82,14 @@ class Settings(BaseSettings):
     server_stats: str = "/stats"
     log_level: str = "INFO"
     squid_cache: bool = False
+    configs_allowed: list = []
+    # configs_allowed: list = [
+    #     'CONFIG_VERSION_DIST',
+    #     'CONFIG_VERSION_NUMBER',
+    #     'CONFIG_TARGET_ROOTFS_TARGZ',
+    #     'CONFIG_TARGET_ROOTFS_JFFS2',
+    #     'CONFIG_TARGET_ROOTFS_SQUASHFS'
+    # ]
 
 
 settings = Settings()

asu/routers/api.py

@@ -17,6 +17,10 @@
     get_request_hash,
 )
 
+import re
+
+configs_extract = r"^# (CONFIG_[\w_.-]) is not set|(CONFIG_[\w_.-]+)"
+
 router = APIRouter()
 
 
@@ -71,6 +75,12 @@ def validate_request(build_request: BuildRequest) -> tuple[dict, int]:
     if build_request.distro not in get_distros():
         return validation_failure(f"Unsupported distro: {build_request.distro}")
 
+    if build_request.configs:
+        for config in build_request.configs:
+            config_key = re.search(configs_extract, config)
+            if config_key[0] not in settings.configs_allowed:
+                return validation_failure("Illegal config requested: {config_key[0]}")
+
     branch = get_branch(build_request.version)["name"]
 
     r = get_redis_client()

asu/util.py

@@ -97,6 +97,18 @@ def get_file_hash(path: str) -> str:
     return h.hexdigest()
 
 
+def get_configs_hash(configs: list) -> str:
+    """Return sha256sum of configs list
+    Duplicate configs are automatically removed and the list is sorted to be
+    reproducible
+    Args:
+        configs (list): list of configs
+    Returns:
+        str: hash of `req`
+    """
+    return get_str_hash(" ".join(sorted(list(set(configs)))))
+
+
 def get_manifest_hash(manifest: dict[str, str]) -> str:
     """Return sha256sum of package manifest
 
@@ -132,6 +144,7 @@ def get_request_hash(build_request: BuildRequest) -> str:
                 build_request.target,
                 build_request.profile.replace(",", "_"),
                 get_packages_hash(build_request.packages),
+                get_configs_hash(build_request.configs),
                 get_manifest_hash(build_request.packages_versions),
                 str(build_request.diff_packages),
                 "",  # build_request.filesystem