Hello, there!

pmb/parse/arch.py

@@ -0,0 +1,103 @@
+"""
+Copyright 2017 Oliver Smith
+
+This file is part of pmbootstrap.
+
+pmbootstrap is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+pmbootstrap is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with pmbootstrap.  If not, see <http://www.gnu.org/licenses/>.
+"""
+import platform
+import logging
+import fnmatch
+
+
+def alpine_native():
+    machine = platform.machine()
+    ret = ""
+
+    if machine == "x86_64":
+        ret = "x86_64"
+    else:
+        raise ValueError("Can not map platform.machine " + machine +
+                         " to the right Alpine Linux architecture")
+
+    logging.debug("(native) Alpine architecture: " + ret)
+    return ret
+
+
+def from_chroot_suffix(args, suffix):
+    if suffix == "native":
+        return args.arch_native
+    if suffix == "rootfs_" + args.device:
+        return args.deviceinfo["arch"]
+    if suffix.startswith("buildroot_"):
+        return suffix.split("_", 2)[1]
+
+    raise ValueError("Invalid chroot suffix: " + suffix +
+                     " (wrong device chosen in 'init' step?)")
+
+
+def alpine_to_debian(arch):
+    """
+    Convert the architecture to the string used in the binfmt info
+    (aka. the Debian architecture format).
+    """
+
+    mapping = {
+        "x86_64": "amd64",
+        "armhf": "arm",
+    }
+    for pattern, arch_debian in mapping.items():
+        if fnmatch.fnmatch(arch, pattern):
+            return arch_debian
+    raise ValueError("Can not map Alpine architecture " + arch +
+                     " to the right Debian architecture.")
+
+
+def alpine_to_kernel(arch):
+    """
+    Convert the architecture to the string used inside the kernel sources.
+    You can read the mapping from the linux-vanilla APKBUILD for example.
+    """
+    mapping = {
+        "aarch64*": "arm64",
+        "arm*": "arm",
+        "ppc*": "powerpc",
+        "s390*": "s390"
+    }
+    for pattern, arch_kernel in mapping.items():
+        if fnmatch.fnmatch(arch, pattern):
+            return arch_kernel
+    return arch
+
+
+def alpine_to_hostspec(arch):
+    """
+    See: abuild source code/functions.sh.in: arch_to_hostspec()
+    """
+    mapping = {
+        "aarch64": "aarch64-alpine-linux-musl",
+        "armhf": "armv6-alpine-linux-muslgnueabihf",
+        "armv7": "armv7-alpine-linux-musleabihf",
+        "ppc": "powerpc-alpine-linux-musl",
+        "ppc64": "powerpc64-alpine-linux-musl",
+        "ppc64le": "powerpc64le-alpine-linux-musl",
+        "s390x": "s390x-alpine-linux-musl",
+        "x86": "i586-alpine-linux-musl",
+        "x86_66": "x86_64-alpine-linux-musl",
+    }
+    if arch in mapping:
+        return mapping[arch]
+
+    raise ValueError("Can not map Alpine architecture " + arch +
+                     " to the right hostspec value")