X-Git-Url: https://code.delx.au/gnu-emacs-elpa/blobdiff_plain/3b4b50405034b4fd06d1500a5ba76ce10eaa60e9..e5ce35751236d77c15904e0f8f0f816ba8b517f8:/README

diff --git a/README b/README
index 9cf7ad709..a68804006 100644
--- a/README
+++ b/README
@@ -92,17 +92,33 @@ merge -s subtree" from the upstream branch.
 
 In the `external' case, the copy of the code is not kept here but in the
 `externals/<pkg>' branch in the `elpa' repository.
+
 You can check out all the external packages into the `packages' directory
 with the command:
 
    make externals
 
+You can check out a specific external PACKAGE into the `packages'
+directory with these commands:
+
+   cd packages
+   git clone --reference .. --single-branch --branch externals/PACKAGE $(git config remote.origin.url) PACKAGE
+
+If you already have a packages/PACKAGE directory with a previous
+checkout, you can update it like this:
+
+   cd packages/PACKAGE
+   git pull
+
 ** Public incubation
 
 If you want to develop a package publicly prior to its first release (to
 benefit from others' feedback, primarily), but not in an external repo,
-you can push to an "ephemeral" branch -- subject to rebase and eventual
-removal upon finishing merge -- for the duration of the incubation.
+you have 2 choices:
+- you can simply put "Version: 0" to indicate that this should not be
+  released yet.
+- or you can push to an "ephemeral" branch -- subject to rebase and eventual
+  removal upon finishing merge -- for the duration of the incubation.
 
 * DEPLOYMENT
 
@@ -122,6 +138,7 @@ packages/ directory.  You can then add that directory, e.g. with:
    git clone .../elpa
    mkdir build
    cd build
+   (cd ../elpa; git log --format=%H | tail -n 1) >.changelog-witness
    ln -s ../elpa/admin
    ln -s ../elpa/GNUmakefile
    admin/update-archive.sh