Software / code / prosody
Changeset
11748:88ba05494d17 0.11
makefile: fix prosody.version target
POSIX is quite explicit regarding the precedence of AND-OR lists [0]:
> The operators "&&" and "||" shall have equal precedence and shall be
> evaluated with left associativity. For example, both of the following
> commands write solely `bar` to standard output:
> false && echo foo || echo bar
> true || echo foo && echo bar
Given that, `prosody.version` target behaves as
((((((test -f prosody.release && cp ...) ||
test -f ...) &&
sed ...) ||
test -f ...) &&
hexdump ...) ||
echo unknown > $@)
In the case of release tarballs, `prosody.release` does exist, so the
first AND pair is executed. Given that it's successful, then the first
`test -f` in the OR pair is ignored, and instead the `sed` in the AND
pair is executed. `sed` success, as `.hg_archival.txt` exists, making
the second `test -f` in the OR pair ignored, and `hexdump` in the AND
pair is executed. Now, given that `.hg` doesn't exist, it fails, so the
last `echo` is run, overwriting `prosody.version` with `unknown`.
This can be worked around placing `()` around the AND pairs. Decided to use
conditionals instead, as I think they better communicate the intention
of the block.
[0]: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_09_03
| author | Lucas <lucas@sexy.is> |
|---|---|
| date | Sun, 15 Aug 2021 04:10:36 +0000 |
| parents | 11746:68faaf936f6d |
| children | 11750:a8760562a096 11751:a8c9a78c6a4b |
| files | makefile |
| diffstat | 1 files changed, 9 insertions(+), 9 deletions(-) [+] |
line wrap: on
line diff
--- a/makefile Tue Jul 06 08:18:28 2021 +0100 +++ b/makefile Sun Aug 15 04:10:36 2021 +0000 @@ -90,12 +90,12 @@ sed 's|certs/|$(INSTALLEDCONFIG)/certs/|' prosody.cfg.lua.dist > $@ prosody.version: - test -f prosody.release && \ - cp prosody.release $@ || \ - test -f .hg_archival.txt && \ - sed -n 's/^node: \(............\).*/\1/p' .hg_archival.txt > $@ || \ - test -f .hg/dirstate && \ - hexdump -n6 -e'6/1 "%02x"' .hg/dirstate > $@ || \ - echo unknown > $@ - - + if [ -f prosody.release ]; then \ + cp prosody.release $@; \ + elif [ -f .hg_archival.txt ]; then \ + sed -n 's/^node: \(............\).*/\1/p' .hg_archival.txt > $@; \ + elif [ -f .hg/dirstate ]; then \ + hexdump -n6 -e'6/1 "%02x"' .hg/dirstate > $@; \ + else \ + echo unknown > $@; \ + fi
