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Refactor lint_source to work with earlier versions of Bash

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Negative subscripts to indexed arrays are not supported before 4.2.  However,
since substring expansion works on arrays, we can specify an offset of -1 to
be taken relative to one greater than the maximum index of the specified
array (see Parameter Expansion section of the bash man page).  This works with
both Bash 4.1 and 4.2, and 4.1 is already the oldest supported by pacman.

Signed-off-by: Aaron Campbell <aaron@monkey.org>
Signed-off-by: Allan McRae <allan@archlinux.org>
This commit is contained in:
Aaron Campbell 2015-11-04 15:43:12 -04:00 committed by Allan McRae
parent 8fa02036c3
commit bf0e8e6b43
1 changed files with 1 additions and 1 deletions
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2
scripts/libmakepkg/lint_pkgbuild/source.sh.in
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@ -32,7 +32,7 @@ lint_pkgbuild_functions+=('lint_source')
lint_source() {
local idx=("${!source[@]}")
if (( ${#source[*]} > 0 && (idx[-1] + 1) != ${#source[*]} )); then
if (( ${#source[*]} > 0 && (${idx[@]: -1} + 1) != ${#source[*]} )); then
error "$(gettext "Sparse arrays are not allowed for source")"
return 1
fi