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* fix: update disk badge icons for dmg * chore: try with code icons as badge * fix: patch badge icon outside of dmgbuild Refs https://github.com/dmgbuild/dmgbuild/issues/278 which doesn't work well on macOS 26. We avoid forking the project in this manner.
72 lines
1.9 KiB
Python
72 lines
1.9 KiB
Python
#!/usr/bin/env python3
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import subprocess
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import shutil
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import tempfile
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import plistlib
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import os
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def patch_dmg_icon(dmg_path, new_icon_path):
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"""Replace the volume icon in an existing DMG."""
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# 1. Convert to read-write format
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temp_rw = tempfile.NamedTemporaryFile(suffix=".dmg", delete=False)
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temp_rw.close()
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subprocess.run([
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"hdiutil", "convert", dmg_path,
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"-format", "UDRW", # Read-write
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"-o", temp_rw.name,
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"-ov" # Overwrite
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], check=True)
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# 2. Attach the writable DMG
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result = subprocess.run(
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["hdiutil", "attach", "-nobrowse", "-plist", temp_rw.name],
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capture_output=True, check=True
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)
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plist = plistlib.loads(result.stdout)
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mount_point = None
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device = None
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for entity in plist["system-entities"]:
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if "mount-point" in entity:
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mount_point = entity["mount-point"]
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device = entity["dev-entry"]
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break
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try:
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# 3. Copy custom icon
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icon_target = os.path.join(mount_point, ".VolumeIcon.icns")
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shutil.copyfile(new_icon_path, icon_target)
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# 4. Set the custom icon attribute on the volume
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subprocess.run(["/usr/bin/SetFile", "-a", "C", mount_point], check=True)
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# Sync before detach
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subprocess.run(["sync", "--file-system", mount_point], check=True)
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finally:
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# 5. Detach
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subprocess.run(["hdiutil", "detach", device], check=True)
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# 6. Convert back to compressed format (ULMO = lzma)
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subprocess.run([
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"hdiutil", "convert", temp_rw.name,
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"-format", "ULMO",
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"-o", dmg_path,
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"-ov"
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], check=True)
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# Cleanup temp file
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os.unlink(temp_rw.name)
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print(f"Successfully patched {dmg_path} with new icon")
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if __name__ == "__main__":
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import sys
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if len(sys.argv) != 3:
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print(f"Usage: {sys.argv[0]} <dmg_path> <icon.icns>")
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sys.exit(1)
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patch_dmg_icon(sys.argv[1], sys.argv[2])
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