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| author | Daniel Schaefer <git@danielschaefer.me> | 2019-05-03 14:30:29 +0200 |
|---|---|---|
| committer | Daniel Schaefer <git@danielschaefer.me> | 2019-05-03 17:23:36 +0200 |
| commit | 3f192ac80ca421888c668896b63485486e1397ae (patch) | |
| tree | 128bbf3ee807b44498ac3cd256973a2bb455127a /doc/manual/expressions | |
| parent | f9a2ea44867cd1dbb408bca4df0ced806137b7f7 (diff) | |
Add builtins.hashFile
For text files it is possible to do it like so:
`builtins.hashString "sha256" (builtins.readFile /tmp/a)`
but that doesn't work for binary files.
With builtins.hashFile any kind of file can be conveniently hashed.
Diffstat (limited to 'doc/manual/expressions')
| -rw-r--r-- | doc/manual/expressions/builtins.xml | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/doc/manual/expressions/builtins.xml b/doc/manual/expressions/builtins.xml index 0fb5261b3..a87639a07 100644 --- a/doc/manual/expressions/builtins.xml +++ b/doc/manual/expressions/builtins.xml @@ -705,6 +705,19 @@ builtins.genList (x: x * x) 5 </varlistentry> + <varlistentry xml:id='builtin-hashFile'> + <term><function>builtins.hashFile</function> + <replaceable>type</replaceable> <replaceable>p</replaceable></term> + + <listitem><para>Return a base-16 representation of the + cryptographic hash of the file at path <replaceable>p</replaceable>. The + hash algorithm specified by <replaceable>type</replaceable> must + be one of <literal>"md5"</literal>, <literal>"sha1"</literal>, + <literal>"sha256"</literal> or <literal>"sha512"</literal>.</para></listitem> + + </varlistentry> + + <varlistentry xml:id='builtin-head'> <term><function>builtins.head</function> <replaceable>list</replaceable></term> |