From c37147a07f9830cc6c6084142cbdae53741a2913 Mon Sep 17 00:00:00 2001
From: Mürsel Türk
Date: Wed, 14 Sep 2022 23:12:36 +0200
Subject: Add support for alpine linux

---
 inspect.py            |  6 +++++-
 tools/inspect_apps.py | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 60 insertions(+), 1 deletion(-)

diff --git a/inspect.py b/inspect.py
index 8b41fbf..aba1731 100755
--- a/inspect.py
+++ b/inspect.py
@@ -7,6 +7,7 @@ import sys
 
 from tools import libvslvm, lklfuse, nbdfuse, subfiles, unmount, rmdir
 from tools.inspect_apps import (
+    list_applications_apk,
     list_applications_dpkg,
     list_applications_pacman,
     list_applications_rpm,
@@ -18,6 +19,7 @@ from tools.pyparted import list_partitions
 fmt = "{asctime}, {name}:{lineno}:{funcName}(), {levelname}, {message}"
 logging.basicConfig(level=logging.DEBUG, format=fmt, style="{")
 
+APK = re.compile(r"^(Alpine).*$")
 DEB = re.compile(r"^(Debian|Ubuntu|Linux\sMint|LMDE).*$")
 PACMAN = re.compile(r"^(Arch|Manjaro).*$")
 RPM = re.compile(r"^(CentOS|AlmaLinux|Scientific|Rocky|Oracle|openSUSE|Fedora).*$") # noqa
@@ -66,7 +68,9 @@ def main(vmdk_path):
 
     os_name = os_info.get("name", "")
     for fspath, _ in fs_mps:
-        if DEB.match(os_name):
+        if APK.match(os_name):
+            apps = list_applications_apk(fspath)
+        elif DEB.match(os_name):
             apps = list_applications_dpkg(fspath)
         elif PACMAN.match(os_name):
             apps = list_applications_pacman(fspath)
diff --git a/tools/inspect_apps.py b/tools/inspect_apps.py
index 7031a0a..613649b 100644
--- a/tools/inspect_apps.py
+++ b/tools/inspect_apps.py
@@ -6,6 +6,7 @@ import tempfile
 from . import log, subdirs
 
 __all__ = [
+    "list_applications_apk",
     "list_applications_dpkg",
     "list_applications_pacman",
     "list_applications_rpm",
@@ -33,6 +34,60 @@ except ModuleNotFoundError:
     raise
 
 
+@log
+def list_applications_apk(path):
+    """Find all packages installed on the linux distribution Alpine Linux.
+
+    See also:
+    https://wiki.alpinelinux.org/wiki/Alpine_Package_Keeper
+
+    Args:
+        path (str): Path to the mounted filesystem.
+
+    Returns:
+        List of packages. For example:
+        [{'name': 'musl', 'version': '1.2.3-r0'}, ...]
+    """
+    apk_db = None
+
+    location = "lib/apk/db/installed"
+
+    db = os.path.join(path, location)
+    if os.path.exists(db):
+        apk_db = db
+
+    if apk_db is None:
+        for dir in subdirs(path):
+            new_path = os.path.join(path, dir)
+            db = os.path.join(new_path, location)
+            if os.path.exists(db):
+                apk_db = db
+                break
+
+    if apk_db is None:
+        L.debug("apk database not found")
+        return []
+
+    pkgs = []
+    with open(apk_db) as f:
+        name = version = ""
+        for line in f:
+            line = line.strip()
+            if not line:
+                if name and version:
+                    pkgs.append({
+                        "name": name,
+                        "version": version
+                    })
+                name = version = ""
+            elif line.startswith("P:"):
+                name = line[2:]
+            elif line.startswith("V:"):
+                version = line[2:]
+
+    return pkgs
+
+
 @log
 def list_applications_dpkg(path):
     """Find all packages installed on a debian-based linux distribution.
-- 
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