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authorLudovic Courtès <ludo@gnu.org>2016-07-13 23:51:17 +0200
committerLudovic Courtès <ludo@gnu.org>2016-07-13 23:51:17 +0200
commitdb97a03a892c662f316c9fd6a497b4b2a18626b3 (patch)
tree3291cd3f9703cb6f3ea7f2247bec9aed102482c0
parent2d94702ff4133606cda1e51a2c8378a8e79afb9d (diff)
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doc: Explain 'guix hash -r' for Git checkouts.
* doc/guix.texi (origin Reference): Add xref to "guix download" and "guix hash". (Invoking guix hash): Provide an example to compute the hash of a Git checkout. Co-authored-by: Troy Sankey <sankeytms@gmail.com>
-rw-r--r--doc/guix.texi16
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diff --git a/doc/guix.texi b/doc/guix.texi
index 67ece1d23f..4b55473c93 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -2669,6 +2669,7 @@ Examples include:
download a file from the HTTP, HTTPS, or FTP URL specified in the
@code{uri} field;
+@vindex git-fetch
@item @var{git-fetch} from @code{(guix git-download)}
clone the Git version control repository, and check out the revision
specified in the @code{uri} field as a @code{git-reference} object; a
@@ -2686,6 +2687,10 @@ A bytevector containing the SHA-256 hash of the source. Typically the
@code{base32} form is used here to generate the bytevector from a
base-32 string.
+You can obtain this information using @code{guix download}
+(@pxref{Invoking guix download}) or @code{guix hash} (@pxref{Invoking
+guix hash}).
+
@item @code{file-name} (default: @code{#f})
The file name under which the source code should be saved. When this is
@code{#f}, a sensible default value will be used in most cases. In case
@@ -4569,6 +4574,17 @@ hash (@pxref{Invoking guix archive}).
@c FIXME: Replace xref above with xref to an ``Archive'' section when
@c it exists.
+@vindex git-fetch
+As an example, here is how you would compute the hash of a Git checkout,
+which is useful when using the @code{git-fetch} method (@pxref{origin
+Reference}):
+
+@example
+$ git clone http://example.org/foo.git
+$ cd foo
+$ rm -rf .git
+$ guix hash -r .
+@end example
@end table
@node Invoking guix import