From 22dce48d3ec27d0db8f6a069744d44454382bcc4 Mon Sep 17 00:00:00 2001
From: "Jose M. Guisado" <jguisado@soleta.eu>
Date: Tue, 25 Apr 2023 13:29:05 +0200
Subject: utils: add get_filesystem_type function

Retrieve filesystem type from a partition using get_filesystem_type.
Encapsulates a subprocess call to blkid.
---
 src/utils/fs.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/utils/fs.py b/src/utils/fs.py
index 7b0e1c3..a7058a7 100644
--- a/src/utils/fs.py
+++ b/src/utils/fs.py
@@ -165,3 +165,15 @@ def mkfs_fat32(partdev, label=None):
         subprocess.run(cmd,
                        stdout=logfile,
                        stderr=STDOUT)
+
+
+def get_filesystem_type(partdev):
+    """
+    Get filesystem type from a partition device path.
+    Raises RuntimeError when blkid exits with non-zero return code.
+    """
+    cmd = shlex.split(f'blkid -o value -s TYPE {partdev}')
+    proc = subprocess.run(cmd, stdout=PIPE, encoding='utf-8')
+    if proc.returncode != 0:
+        raise RuntimeError(f'Error getting filesystem from {partdev}')
+    return proc.stdout.strip()
-- 
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