Timeline for choosing between $0 and BASH_SOURCE
Current License: CC BY-SA 4.0
25 events
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| May 24 at 23:23 | comment | added | mklement0 |
I appreciate the nice feedback, @hek2mgl. The reason that $BASH_SOURCE is mentioned nonetheless is that not everyone uses shellcheck.net (notwithstanding its usefulness), and those that don't won't care about the latter's warnings. The middle section is for those who want to dig deeper and understand the trade-offs.
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| May 24 at 23:02 | comment | added | hek2mgl |
Didn't you know that people will only read the first sentence? :) ... Joke aside, and to be clear: I think this answer is super helpful and well written, no doubt. I just think the more simply ... part in the first sentence is unnecessary. If you take shellcheck into account, it's not simpler and therefore I wouldn't mention it. Please take this only as a small side-note. Great answer!
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| May 24 at 11:25 | history | edited | mklement0 | CC BY-SA 4.0 |
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| May 24 at 11:25 | comment | added | mklement0 |
@hek2mgl, the entire middle section of this answer is dedicated to this discussion. ${BASH_SOURCE[0]} is enough to silence the warning.
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| May 24 at 11:06 | comment | added | hek2mgl |
Hi. shellcheck gives a warning when using ${BASH_SOURCE} without index: "C2128 (warning): Expanding an array without an index only gives the first element.". The warning could be silenced, but this would probably speak against the argument of simplicity as it requires more keystrokes to silence the warning than simply using ${BASH_SOURCE[0]}. Having this, and since shellcheck is a good thing which people should use, I would not recommend to use ${BASH_SOURCE}
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| Jan 23, 2023 at 22:35 | comment | added | mklement0 | Thanks, @MarkReed - I've updated the answer to fix the incorrect statement, but I didn't go into as much depth as your comment does, given that the original comment was just an aside. | |
| Jan 23, 2023 at 22:16 | history | edited | mklement0 | CC BY-SA 4.0 |
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| Jan 23, 2023 at 22:03 | comment | added | Mark Reed |
"(By contrast, zsh, ever the renegade, indeed does return the first element, irrespective of its index)." Actually, in zsh, an unsubscripted array parameter expansion becomes the whole array, not just the first item. Without shwordsplit set,$ary ~= "${ary[@]}", "$ary" ~= "${ary[*]}", and $=ary ~= ${ary[*]} or ${ary[@]} without the quotes.
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| Apr 23, 2021 at 22:49 | history | edited | mklement0 | CC BY-SA 4.0 |
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| Apr 23, 2021 at 22:24 | comment | added | mklement0 | @CharlieParker, please see the new bottom section I've added to the answer. | |
| Apr 23, 2021 at 22:24 | history | edited | mklement0 | CC BY-SA 4.0 |
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| Apr 10, 2021 at 1:20 | history | edited | mklement0 | CC BY-SA 4.0 |
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| Aug 2, 2019 at 2:00 | history | edited | mklement0 | CC BY-SA 4.0 |
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| May 15, 2019 at 4:34 | comment | added | mklement0 |
@AlexanderMills Yes, if you're using Bash, $BASH_SOURCE is the better choice.
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| May 15, 2019 at 3:03 | comment | added | Alexander Mills | so $BASH_SOURCE is more generic and works in more circumstances? | |
| S Nov 8, 2018 at 17:21 | history | suggested | dungdm93 | CC BY-SA 4.0 |
add more example to more clear
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| Nov 8, 2018 at 16:40 | review | Suggested edits | |||
| S Nov 8, 2018 at 17:21 | |||||
| Nov 2, 2017 at 9:52 | history | edited | mklement0 | CC BY-SA 3.0 |
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| Nov 2, 2017 at 9:40 | history | edited | mklement0 | CC BY-SA 3.0 |
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| May 23, 2017 at 12:02 | history | edited | URL Rewriter Bot |
replaced http://stackoverflow.com/ with https://stackoverflow.com/
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| Mar 2, 2017 at 13:14 | history | edited | mklement0 | CC BY-SA 3.0 |
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| Jan 26, 2016 at 3:33 | vote | accept | H2ONaCl | ||
| Jan 26, 2016 at 3:26 | history | edited | mklement0 | CC BY-SA 3.0 |
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| Jan 26, 2016 at 3:20 | history | edited | mklement0 | CC BY-SA 3.0 |
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| Jan 26, 2016 at 3:15 | history | answered | mklement0 | CC BY-SA 3.0 |