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| -rw-r--r-- | doc/guix-cookbook.texi | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/doc/guix-cookbook.texi b/doc/guix-cookbook.texi index 31c4cd4121..efafbd9d93 100644 --- a/doc/guix-cookbook.texi +++ b/doc/guix-cookbook.texi @@ -852,6 +852,24 @@ version when packaging programs for a specific commit, following the Guix contributor guidelines (@pxref{Version Numbers,,, guix, GNU Guix Reference Manual}). +How does one obtain the @code{sha256} hash that's in there, you ask? By +invoking @command{guix hash} on a checkout of the desired commit, along +the lines: + +@example +git clone https://github.com/libgit2/libgit2/ +cd libgit2 +git checkout v0.26.6 +guix hash -rx . +@end example + +@command{guix hash -rx} computes a SHA256 hash over the whole directory, +excluding the @file{.git} sub-directory (@pxref{Invoking guix hash,,, +guix, GNU Guix Reference Manual}). + +In the future, @command{guix download} will hopefully be able to do +these steps for you, just like it does for regular downloads. + @subsubsection Snippets Snippets are quoted (i.e. non-evaluated) Scheme code that are a means of patching |