diff options
Diffstat (limited to 'gnu/packages/file-systems.scm')
| -rw-r--r-- | gnu/packages/file-systems.scm | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/gnu/packages/file-systems.scm b/gnu/packages/file-systems.scm index 97519775c1..ad721017b5 100644 --- a/gnu/packages/file-systems.scm +++ b/gnu/packages/file-systems.scm @@ -773,6 +773,89 @@ All of this is accomplished without a centralized metadata server.") "This is a file system client based on the FTP File Transfer Protocol.") (license license:gpl2+))) +(define-public libeatmydata + (package + (name "libeatmydata") + (version "129") + (source + (origin + (method url-fetch) + (uri (string-append "https://www.flamingspork.com/projects/libeatmydata/" + "libeatmydata-" version ".tar.gz")) + (sha256 + (base32 "1qycv1cvy6fr3v5rxilnsqxllwyfbqlcairlh31x2dnjsx28jnqf")))) + (build-system gnu-build-system) + (arguments + ;; All tests pass---but only if the host kernel allows PTRACE_TRACEME. + `(#:tests? #f + #:configure-flags + (list "--disable-static") + #:phases + (modify-phases %standard-phases + (add-after 'unpack 'patch-file-names + (lambda* (#:key inputs #:allow-other-keys) + (substitute* (list "eatmydata.in" "eatmydata.sh.in") + (("basename|readlink|uname" command) + (string-append (assoc-ref inputs "coreutils") "/bin/" command))))) + (add-before 'patch-file-names 'tighten-symlink-mode + ;; When the ‘eatmydata’ helper detects that it's a symlink, it will + ;; transparently invoke the command of the same name. However, it's + ;; *always* a link in Guix profiles and doesn't handle that well. + ;; Patch it to treat its own $name specially. + (lambda _ + (substitute* "eatmydata.in" + (("-L \"\\$0\"" match) + (string-append match " ] && [ " + "\"x$(basename \"$0\")\" != \"x$name\""))))) + (add-after 'install 'install-debian-files + (lambda* (#:key inputs outputs #:allow-other-keys) + (let* ((debian (assoc-ref inputs "debian-files")) + (out (assoc-ref outputs "out")) + (share (string-append out "/share"))) + (invoke "tar" "xvf" debian) + (with-directory-excursion "debian" + (install-file "eatmydata.1" (string-append share "/man/man1")) + (install-file "eatmydata.bash-completion" + (string-append share "/bash-completion" + "/completions"))))))))) + (native-inputs + `(("debian-files" ; for the man page + ,(origin + (method url-fetch) + (uri (string-append "https://deb.debian.org/debian/pool/main/" + "libe/libeatmydata/libeatmydata_" version + "-1.debian.tar.xz")) + (sha256 + (base32 "0q6kx1bf870jj52a2vm5p5xlrr89g2zs8wyhlpn80pys9p28nikx")))) + ;; For the test suite. + ("strace" ,strace) + ("which" ,which))) + (inputs + `(("coreutils" ,coreutils))) + (home-page "https://www.flamingspork.com/projects/libeatmydata/") + (synopsis "Transparently ignore calls to synchronize data safely to disk") + (description + "Libeatmydata transparently disables most ways a program might force data +to be written to the file system, such as @code{fsync()} or @code{open(O_SYNC)}. + +Such synchronisation calls provide important data integrity guarantees but are +expensive to perform and can significantly slow down software that (over)uses +them. + +This price is worth paying if you care about the files being modified---which is +typically the case---or when manipulating important components of your system. +Please, @emph{do not} use something called ``eat my data'' in such cases! + +However, it does not make sense to accept this performance hit if the data is +unimportant and you can afford to lose all of it in the event of a crash, for +example when running a software test suite. Adding @code{}libeatmydata.so} to +the @env{LD_PRELOAD} environment of such tasks will override all C library data +synchronisation functions with custom @i{no-op} ones that do nothing and +immediately return success. + +A simple @command{eatmydata} script is included that does this for you.") + (license license:gpl3+))) + (define-public libnfs (package (name "libnfs") |