[waiting for #1359] feat(_comp_compgen): support -P prefix with adjusted cur
#1360
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* fix(firefox): do not split longopt argument * fix(make): work around localvar_inherit * fix(make): work around custom IFS * fix(strings): work around nounset * perf(_comp_delimited): add "$prefix" only when it is non-empty * refactor(cppcheck): use `_comp_delimited` * refactor(openssl): prefix "-" to the generated items
akinomyoga
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-P prefix with adjusted cur-P prefix with adjusted cur
The Bash builtin `compgen -P prefix ... -- "$cur"` prepends the prefix AFTER filtering completions using `$cur`. However, we usually want to filter completions with "$cur" starting with the prefix. To properly handle such a situation, one first needs to check if the current content of "$cur" is compatible. Then, one needs to modify $cur to remove the prefix part, generate completions, and prepends the prefix to the generated completions. This pattern is used frequently in the codebase, so it is good to handle it within `_comp_compgen`. This patch implements the option `-P` of `_comp_compgen`. When a non-empty string is specified to the `-P` option, it performs the necessary operations: the check and adjustment of $cur, the proper filtering by the prefix string, and prepending of the prefix string.
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