This patch is needed in order to build Guix on a Btrfs file system. From da922703282b0d3b8837a99a9c7fdd32f1d20d49 Mon Sep 17 00:00:00 2001 From: Mark H Weaver Date: Tue, 9 Jan 2018 20:16:14 -0500 Subject: [PATCH] Remove nonportable check for files containing only zeroes. This check benefitted only one unlikely case (large files containing only zeroes, on systems that do not support SEEK_HOLE) and was based on an assumption about file system behavior that is not mandated by POSIX and no longer holds in practice, namely that for sufficiently large files, (st_blocks == 0) implies that the file contains only zeroes. Examples of file systems that violate this assumption include Linux's /proc file system and Btrfs. * src/sparse.c (sparse_scan_file_wholesparse): Remove this function. (sparse_scan_file_seek): Remove the initial check for files containing only zeroes. --- src/sparse.c | 24 ------------------------ 1 file changed, 24 deletions(-) diff --git a/src/sparse.c b/src/sparse.c index d41c0ea..3de6560 100644 --- a/src/sparse.c +++ b/src/sparse.c @@ -261,26 +261,6 @@ sparse_scan_file_raw (struct tar_sparse_file *file) return tar_sparse_scan (file, scan_end, NULL); } -static bool -sparse_scan_file_wholesparse (struct tar_sparse_file *file) -{ - struct tar_stat_info *st = file->stat_info; - struct sp_array sp = {0, 0}; - - /* Note that this function is called only for truly sparse files of size >= 1 - block size (checked via ST_IS_SPARSE before). See the thread - http://www.mail-archive.com/bug-tar@gnu.org/msg04209.html for more info */ - if (ST_NBLOCKS (st->stat) == 0) - { - st->archive_file_size = 0; - sp.offset = st->stat.st_size; - sparse_add_map (st, &sp); - return true; - } - - return false; -} - #ifdef SEEK_HOLE /* Try to engage SEEK_HOLE/SEEK_DATA feature. */ static bool @@ -343,10 +323,6 @@ sparse_scan_file_seek (struct tar_sparse_file *file) static bool sparse_scan_file (struct tar_sparse_file *file) { - /* always check for completely sparse files */ - if (sparse_scan_file_wholesparse (file)) - return true; - switch (hole_detection) { case HOLE_DETECTION_DEFAULT: -- 2.15.1 v class='content'>
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2024-07-18git: Remove untracked files from cached checkouts....Cached checkouts could end up with stale untracked files, for example because the checkout was interrupted. As a result, when this happens for the Guix checkout, users would not get substitutes for ‘guix pull’. * guix/git.scm (delete-untracked-files): New procedure. (switch-to-ref): Use it. * tests/git.scm ("update-cached-checkout, untracked files removed"): New test. Co-authored-by: Ricardo Wurmus <rekado@elephly.net> Change-Id: Iccbe644ade396ad27a037db7e0ef1c2a68ef91ce Ludovic Courtès
2023-09-26tests: Assume ‘git’ is always available....* tests/channels.scm (gpg+git-available?): Check for ‘gpg-command’ only. Remove all ‘test-skip’ statements. * tests/derivations.scm: Likewise. * tests/git-authenticate.scm: Likewise. * tests/git.scm: Likewise. * tests/import-git.scm: Likewise. Ludovic Courtès
2022-10-17git: 'update-cached-checkout' returns the commit ID when given a tag....Previously, starting with commit efa578ecaece67366b4b0e2266de7c2faaa4ae54, 'update-cached-checkout' would return the OID of the annotated tag the tag points to. With this change it returns the OID of the commit object in all cases. * guix/git.scm (resolve-reference): In the 'tag' case, call 'tag-target-id' and 'tag-lookup' when OID designates an annotated tag. * tests/git.scm ("update-cached-checkout, tag"): New test. Ludovic Courtès