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authorGravatar Yann E. MORIN <yann.morin.1998@free.fr>2018-05-11 17:50:58 +0200
committerGravatar Thomas Petazzoni <thomas.petazzoni@bootlin.com>2018-05-11 23:03:21 +0200
commit970cb26ec22e165c9b1fea27a85cfe5762096b19 (patch)
tree5eb08dd0cc90cd89eaa3edcae8e203d33d2c1a83 /docs
parentfc0d31caeedba084a5cd5ef3766a48c7a8193018 (diff)
downloadbuildroot-970cb26ec22e165c9b1fea27a85cfe5762096b19.tar.gz
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docs/manual: using a branch name as FOO_VERSION does not work
For various reasons, we've always suggested users to avoid using a branch as version string for their packages, because it does not work as a they would expect: - it is not reproducible, because the branch may change between two builds that are done at different times; - it does not even follow the branch, as Buildroot anyway generates a local tarball, which it will reuse on subsequent builds. Furthermore, since we fetch and not pull, any existing local branch is not updated. Yet, until recently, using a branch name would just work (with the above limitations): the git tree was cloned, the branch checked out, and the tarball created. But with the advent of the git caching, using a branch name does not work anymore. Indeed, we now do a git-fetch, and that does not create a local master branch. So we can't check out master, because it does not exist locally. And for other branches, as noticed above, the local branch does not get udpated to the remote one. Furthermore, the local branches are only created by chance, again as a side-effect of trying to fetch the "special refs". So, we can't say that we reliably support the use of a branch name. Update the manual to state that using a branch does not work. Remove the 'stable' example, as it looked like the name of a stable branch; instead, replace it with a version string that ressemble a tag. Fix the layout of the manual by making the version examples an actual bulleted list. Note: the above is only entirely true for git. For Mercurial, CVS and subversion, the status may be mixed, but nonetheless, using branches is still a bad idea, if at least because it is not reproducible, and because Buildroot does not even follow the branch. So, we do not differentiate between the various SCMs, and just flatly state that using a branch name is not supported. Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Thomas De Schampheleire <patrickdepinguin@gmail.com> Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Cc: Maxime Hadjinlian <maxime.hadjinlian@gmail.com> Cc: Peter Korsgaard <peter@korsgaard.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Diffstat (limited to 'docs')
-rw-r--r--docs/manual/adding-packages-generic.txt12
1 files changed, 6 insertions, 6 deletions
diff --git a/docs/manual/adding-packages-generic.txt b/docs/manual/adding-packages-generic.txt
index 7e1f246752..cc91e894bd 100644
--- a/docs/manual/adding-packages-generic.txt
+++ b/docs/manual/adding-packages-generic.txt
@@ -199,12 +199,12 @@ information is (assuming the package name is +libfoo+) :
* +LIBFOO_VERSION+, mandatory, must contain the version of the
package. Note that if +HOST_LIBFOO_VERSION+ doesn't exist, it is
assumed to be the same as +LIBFOO_VERSION+. It can also be a
- revision number, branch or tag for packages that are fetched
- directly from their revision control system. +
- Examples: +
- +LIBFOO_VERSION = 0.1.2+ +
- +LIBFOO_VERSION = cb9d6aa9429e838f0e54faa3d455bcbab5eef057+ +
- +LIBFOO_VERSION = stable+
+ revision number or a tag for packages that are fetched directly
+ from their version control system. Do not use a branch name as
+ version; it does not work. Examples:
+ ** a version for a release tarball: +LIBFOO_VERSION = 0.1.2+
+ ** a sha1 for a git tree: +LIBFOO_VERSION = cb9d6aa9429e838f0e54faa3d455bcbab5eef057+
+ ** a tag for a git tree +LIBFOO_VERSION = v0.1.2+
* +LIBFOO_SOURCE+ may contain the name of the tarball of the package,
which Buildroot will use to download the tarball from