dev/todo/install-bb-without-bb: No alts migration

1 files changed, 14 insertions, 12 deletions

diff --git a/dev/todo/install-bb-without-bb.mdwn b/dev/todo/install-bb-without-bb.mdwn
index 0dd5825..c0a8273 100644
--- a/dev/todo/install-bb-without-bb.mdwn
+++ b/dev/todo/install-bb-without-bb.mdwn
@@ -23,15 +23,15 @@ ProteanOS) **currently unable to upgrade `busybox`**, due to its own design.
 The Amazing Alternatives of `busybox`
 -------------------------------------
 
-Instead of [adding alternatives][alts] one at a time, [it would be nice][bb-ua]
-to manage all of `busybox`'s utility links using `update-alternatives`.
-Unfortunately, the [maintainer script][bb.pi] that runs `update-alternatives`
-(as well as the [`update-alternatives` script][u-a] itself) needs a few
-`busybox` utilities (`/bin/sh` for a start).  Thus, after an older version of
-`busybox` is deconfigured, a newer version can't be configured.  `busybox` also
-can't be configured when first unpacked by `prokit`.
-
-[alts]: http://git.proteanos.com/pkg/busybox.git/log/alternatives
+Instead of [adding alternatives][alts-log] one at a time, [it would be
+nice][bb-ua] to manage all of `busybox`'s utility links using
+`update-alternatives`.  Unfortunately, the [maintainer script][bb.pi] that runs
+`update-alternatives` (as well as the [`update-alternatives` script][u-a]
+itself) needs a few `busybox` utilities (`/bin/sh` for a start).  Thus, after an
+older version of `busybox` is deconfigured, a newer version can't be configured.
+`busybox` also can't be configured when first unpacked by `prokit`.
+
+[alts-log]: http://git.proteanos.com/pkg/busybox.git/log/alternatives
 [bb-ua]: http://git.proteanos.com/pkg/busybox.git/commit/?id=1558d05c62ed90f7d93a14533541c33896b7b733
 [bb.pi]: http://git.proteanos.com/pkg/busybox.git/tree/busybox.pkg/postinst
 [u-a]: https://git.openwrt.org/?p=project/opkg-lede.git;a=blob;f=utils/update-alternatives.in;hb=d4ba162
@@ -68,12 +68,14 @@ too old to have prepared for a safe upgrade.  More design work needed.**
 
 The `opkg` script of the `opkg-lede` package will need to read `busybox`'s list
 of alternatives links.  This is currently located at
-`/usr/share/busybox/alternatives`, though the file's format will change when
-`busybox` uses `update-alternatives` for everything.  **A migration strategy for
-`opkg-lede` will need to be designed.**
+`/usr/share/busybox/alternatives`.  [The file's format][alts] will change when
+`busybox` uses `update-alternatives` for everything: the last two columns (name
+and priority) will be dropped.  `opkg` however can simply read the first column,
+so it will maintain compatibility.
 
 **In summary**, `opkg-lede` can be fixed to be able to safely upgrade `busybox`
 soon, but more design work will be required for `busybox` to manage all of its
 utility links with `update-alternatives`.
 
 [opkg]: http://git.proteanos.com/pkg/opkg-lede.git/tree/opkg
+[alts]: http://git.proteanos.com/pkg/busybox.git/tree/alternatives?id=e37f03311d934a8f33a9ff31db47b18bbf0be555