Bash-compare-versions - Revision history

Chubbard at 22:04, 25 April 2024

2024-04-25T22:04:19Z

← Older revision		Revision as of 15:04, 25 April 2024
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			<metadesc>Bash examples to compare versions</metadesc>
	This is a simplistic way to compare version numbers. This is useful for when commands change over time, and you do not know which or what kind of host will have which version of something.		This is a simplistic way to compare version numbers. This is useful for when commands change over time, and you do not know which or what kind of host will have which version of something.
	* [https://unix.stackexchange.com/questions/269273/bash-convert-a-string-version-number-to-an-integer\|Source page with some examples]		* [https://unix.stackexchange.com/questions/269273/bash-convert-a-string-version-number-to-an-integer\|Source page with some examples]

Chubbard at 16:09, 22 October 2021

2021-10-22T16:09:16Z

← Older revision		Revision as of 09:09, 22 October 2021
Line 30:		Line 30:
	<pre>		<pre>
	\| tr -d [:alpha:]		\| tr -d [:alpha:]
			</pre>

			It is important to note that this really IS a string compare and ordering, so watch out for the following:
			<pre>
			echo -e "2.22\n2.22.0" \| sort -V
			2.22
			2.22.0
	</pre>		</pre>

	[[Category:bash]]		[[Category:bash]]

Chubbard at 16:03, 22 October 2021

2021-10-22T16:03:27Z

← Older revision		Revision as of 09:03, 22 October 2021
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	fi		fi
	</pre>		</pre>

			If there is a v floating about in your returned string, simply append the following to remove all a-z and A-Z characters.
			<pre>
			\| tr -d [:alpha:]
			</pre>

	[[Category:bash]]		[[Category:bash]]

Chubbard at 15:59, 22 October 2021

2021-10-22T15:59:24Z

← Older revision		Revision as of 08:59, 22 October 2021
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	</pre>		</pre>

	Example:		Example: (show the git branch you are on)
	<pre>		<pre>
	if [[ $(printf '%s\n2.22\n' $(git --version \| sed -n '1s/.* //p') \| sort -V) != "2.22" ]]; then		if [[ $(printf '%s\n2.22\n' $(git --version \| sed -n '1s/.* //p') \| sort -V) != "2.22" ]]; then
	echo "Earlier version than cutoff"		echo "Earlier version than cutoff"
	~~someCommand~~		git rev-parse --abbrev-ref HEAD
	else		else
	echo "Later version of cutoff"		echo "Later version of cutoff"
	~~someCommand_with_different_args~~		git branch --show-current
	fi		fi
	</pre>		</pre>
	[[Category:bash]]		[[Category:bash]]

Chubbard: Created page with "This is a simplistic way to compare version numbers. This is useful for when commands change over time, and you do not know which or what kind of host will have which version..."

2021-10-22T15:58:00Z

Created page with "This is a simplistic way to compare version numbers. This is useful for when commands change over time, and you do not know which or what kind of host will have which version..."

New page

This is a simplistic way to compare version numbers. This is useful for when commands change over time, and you do not know which or what kind of host will have which version of something.
* [https://unix.stackexchange.com/questions/269273/bash-convert-a-string-version-number-to-an-integer|Source page with some examples]

<pre>
echo -e "2.22\n11.3.4" | sort -V
2.22
11.3.4
</pre>

<pre>
printf '%s\n2.15\n' $(ldd --version | sed -n '1s/.* //p') | sort -V | head -n 1
</pre>

<pre>
printf '%s\n2.22\n' $(git --version | sed -n '1s/.* //p') | sort -V
</pre>

Example:
<pre>
if [[ $(printf '%s\n2.22\n' $(git --version | sed -n '1s/.* //p') | sort -V) != "2.22" ]]; then
echo "Earlier version than cutoff"
someCommand
else
echo "Later version of cutoff"
someCommand_with_different_args
fi
</pre>
[[Category:bash]]