[libvirt PATCH 2/3] scripts: Add $DESTDIR support to meson-install-web.py

[Andrea Bolognani]

meson already supports $DESTDIR natively, but in this case
we're using a custom script and so we have to do some extra
work ourselves.

Signed-off-by: Andrea Bolognani <abologna at redhat.com>
---
 scripts/meson-install-web.py | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/scripts/meson-install-web.py b/scripts/meson-install-web.py
index fdf407ba33..e7456fa750 100755
--- a/scripts/meson-install-web.py
+++ b/scripts/meson-install-web.py
@@ -6,10 +6,23 @@ import sys
 
 from pathlib import Path
 
+destdir = os.getenv('DESTDIR')
+if destdir:
+    destdir = Path(destdir)
+    if not destdir.is_absolute():
+        print('$DESTDIR must be an absolute path')
+        sys.exit(1)
+
 for desc in sys.argv[1:]:
     inst = desc.split(':')
     src = Path(inst[0])
     dst = Path(inst[1])
 
+    if destdir:
+        # Turn dst into a relative path by dropping its first component
+        # and append it to destdir to obtain the absolute destination
+        # path that respects the value $DESTDIR found in the environment
+        dst = Path(destdir, *dst.parts[1:])
+
     dst.mkdir(parents=True, exist_ok=True)
     shutil.copy(src, dst)
-- 
2.35.3