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Re: Issue with creating an archive with reproducible content
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From: |
Jan-Benedict Glaw |
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Subject: |
Re: Issue with creating an archive with reproducible content |
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Date: |
Sat, 27 Apr 2024 21:48:26 +0200 |
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User-agent: |
Mutt/1.10.1 (2018-07-13) |
On Sat, 2024-04-27 21:23:37 +0200, Jan-Benedict Glaw <jbglaw@lug-owl.de> wrote:
[...]
> tar --sort=name
> \
> --mtime="@${SOURCE_DATE_EPOCH:-$(date +%s)}"
> \
> --owner=0
> \
> --group=0
> \
> --numeric-owner
> \
> --format=pax
> \
>
> --pax-option=exthdr.name=%d/PaxHeaders/%f,delete=atime,delete=ctime,delete=devmajor,delete=devminor
> \
> -cf - "${basename_dir}"
> | \
> gzip -n9 > "${artifacts_dir}/${tarball_filename}"
[...]
> Do you have any suggestion for me to get rid of the
> devmajor/devminor content in the headers? Or should my approach in
> theory work and it's a small bug that it doesn't remove the "0000000"?
For reference, here's (one relevant chunk of) a diff between two such
tarballs; done with `diff -u20`, we see a full header:
---
netbsd-bebox-powerpc-rel-39f3caee78385d617464aabdd9e8cf74ff266692-47.tar.xxd
2024-04-27 21:42:22.364199708 +0200
+++
nnetbsd-bebox-powerpc-rel-39f3caee78385d617464aabdd9e8cf74ff266692-36.tar.xxd
2024-04-27 21:42:37.382995102 +0200
@@ -1,106 +1,106 @@
00000000: 7265 6c65 6173 652d 6265 626f 782d 706f release-bebox-po
00000010: 7765 7270 632f 0000 0000 0000 0000 0000 werpc/..........
00000020: 0000 0000 0000 0000 0000 0000 0000 0000 ................
00000030: 0000 0000 0000 0000 0000 0000 0000 0000 ................
00000040: 0000 0000 0000 0000 0000 0000 0000 0000 ................
00000050: 0000 0000 0000 0000 0000 0000 0000 0000 ................
00000060: 0000 0000 3030 3030 3735 3500 3030 3030 ....0000755.0000
00000070: 3030 3000 3030 3030 3030 3000 3030 3030 000.0000000.0000
00000080: 3030 3030 3030 3000 3134 3631 3136 3632 0000000.14611662
-00000090: 3130 3400 3031 3231 3737 0020 3500 0000 104.012177. 5...
+00000090: 3130 3400 3031 3334 3337 0020 3500 0000 104.013437. 5...
000000a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
000000b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
000000c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
000000d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
000000e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
000000f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
00000100: 0075 7374 6172 0030 3000 0000 0000 0000 .ustar.00.......
00000110: 0000 0000 0000 0000 0000 0000 0000 0000 ................
00000120: 0000 0000 0000 0000 0000 0000 0000 0000 ................
00000130: 0000 0000 0000 0000 0000 0000 0000 0000 ................
-00000140: 0000 0000 0000 0000 0000 0000 0000 0000 ................
-00000150: 0000 0000 0000 0000 0000 0000 0000 0000 ................
+00000140: 0000 0000 0000 0000 0030 3030 3030 3030 .........0000000
+00000150: 0030 3030 3030 3030 0000 0000 0000 0000 .0000000........
00000160: 0000 0000 0000 0000 0000 0000 0000 0000 ................
00000170: 0000 0000 0000 0000 0000 0000 0000 0000 ................
00000180: 0000 0000 0000 0000 0000 0000 0000 0000 ................
00000190: 0000 0000 0000 0000 0000 0000 0000 0000 ................
000001a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
000001b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
000001c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
000001d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
000001e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
000001f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
[...]
Here, you can see the devmajor/devminor difference, as well as a
difference in the checksum (which, I guess, is just a result of the
devmajor/devminor change.)
Thanks,
Jan-Benedict
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