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| author |   Sam James <sam@gentoo.org> | 2021-03-12 21:06:45 +0000 |
|---|---|---|
| committer |   Ulrich Müller <ulm@gentoo.org> | 2021-03-21 06:47:41 +0100 |
| commit | 04d0b38c276a5eb47c7d9485a97dfd73ab5cbff4 (patch) | |
| tree | 31da9620de9a78510ef172261b10f3c67699d2ca /tools-reference | |
| parent | devbook-guide: Clearer section structure (diff) | |
| download | devmanual-04d0b38c276a5eb47c7d9485a97dfd73ab5cbff4.tar.gz devmanual-04d0b38c276a5eb47c7d9485a97dfd73ab5cbff4.tar.bz2 devmanual-04d0b38c276a5eb47c7d9485a97dfd73ab5cbff4.zip | |
tools-reference/bash: elaborate on why bash tests are preferred
Signed-off-by: Sam James <sam@gentoo.org>
Signed-off-by: Ulrich Müller <ulm@gentoo.org>
Diffstat (limited to 'tools-reference')
| -rw-r--r-- | tools-reference/bash/text.xml | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/tools-reference/bash/text.xml b/tools-reference/bash/text.xml index 56608c4..821d385 100644 --- a/tools-reference/bash/text.xml +++ b/tools-reference/bash/text.xml @@ -120,6 +120,14 @@ all new code. </important> <p> +POSIX compliance is not a concern for ebuilds, as their interpreter is +guaranteed to be GNU Bash. POSIX style tests have different semantics and +using the common forms of tests adheres to the principle of least surprise. +Most developers will be used to Bash test semantics and behaviour and deviating +from this in ebuilds may be confusing. +</p> + +<p> This is because <c>[[ ]]</c> is a bash syntax construct, whereas <c>[ ]</c> is a program which happens to be implemented as an internal <d/> as such, cleaner syntax is possible with the former. For a simple illustration, consider: |