One-liners: Difference between revisions

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==Compare two wikis for extensions and skins==

This one-liner invokes the API of two wikis asking for info on siteinfo, general, extensions and skins; in json format. Since that data is returned without any newlines, we use `jq` to pretty-print the json output. Then it's an easy `meld` or `diff` to compare them. The `--silent` option to `curl` just suppresses the connection and retrieval metadata; while the `-L` is customary to follow redirects <cite>The wiki farm detection has changed (@fixme) on this site making it slightly different from mediawiki.org. Still, the one-liner should work but is failing silently whereas a manually executed substitution of <code>~~meld <(curl --silent~~ -L "https://wiki.freephile.org/wiki/api.php?action=query&meta=siteinfo&siprop=general%7Cextensions%7Cskins&format=json" | jq '.') <(curl --silent -L "https://www.mediawiki.org/w/api.php?action=query&meta=siteinfo&siprop=general%7Cextensions%7Cskins&format=json" | jq '.')</code> ~~does launch meld with the proper content.</cite>~~.

This one-liner invokes the API of two wikis asking for info on siteinfo, general, extensions and skins; in json format. Since that data is returned without any newlines, we use <code>jq</code> to pretty-print the json output. Then it's an easy <code>meld</code> or <code>diff</code> to compare them. The <code>--silent</code> option to <code>curl</code> just suppresses the connection and retrieval metadata; while the <code>-L</code> is customary to follow redirects.

A='https://wiki.freephile.org/wiki' B='https://www.mediawiki.org/w' API='/api.php?action=query&meta=siteinfo&siprop=general%7Cextensions%7Cskins&format=json' meld <(curl --silent -L "${A}${API}" | jq '.') <(curl --silent -L "${B}${API}" | jq '.')</syntaxhighlight>

The wiki farm detection has changed (@fixme) on this site making it slightly different from mediawiki.org. Still, the one-liner should work but is failing silently whereas a manually executed substitution of <code>meld <(curl --silent -L "https://wiki.freephile.org/wiki/api.php?action=query&meta=siteinfo&siprop=general%7Cextensions%7Cskins&format=json" | jq '.') <(curl --silent -L "https://www.mediawiki.org/w/api.php?action=query&meta=siteinfo&siprop=general%7Cextensions%7Cskins&format=json" | jq '.')</code> does launch meld with the proper content.

Using more than a single line of code, you can do things with PHP's <code>yaml_parse</code> such as [https://github.com/freephile/meza/blob/37b9be51289b16868730cbc1070a188159323ee7/src/scripts/findDupesInLocalExtensions.php src/scripts/findDupesInLocalExtensions.php]

==Perl edit==

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</syntaxhighlight>

== Find with exclusions ==

Trying to fix [[permissions]], I wanted to see if there were any executable files in the 'data' directory. It turned out that every file in the elasticsearch and uploads directories were +x somehow. So, I wanted to exclude those dirs and see if there was anything else.

sudo find /opt/data-meza/ $ -name uploads -o -name elasticsearch $ -prune -o -type f -perm -ugo=x -ls

</syntaxhighlight>

@@ Line 30: / Line 30: @@
 ==Compare two wikis for extensions and skins==
-This one-liner invokes the API of two wikis asking for info on siteinfo, general, extensions and skins; in json format.  Since that data is returned without any newlines, we use `jq` to pretty-print the json output.  Then it's an easy `meld` or `diff` to compare them.  The `--silent` option to `curl` just suppresses the connection and retrieval metadata; while the `-L` is customary to follow redirects <cite>The wiki farm detection has changed (@fixme) on this site making it slightly different from mediawiki.org. Still, the one-liner should work but is failing silently whereas a manually executed substitution of <code>meld <(curl --silent -L "https://wiki.freephile.org/wiki/api.php?action=query&meta=siteinfo&siprop=general%7Cextensions%7Cskins&format=json" | jq '.') <(curl --silent -L "https://www.mediawiki.org/w/api.php?action=query&meta=siteinfo&siprop=general%7Cextensions%7Cskins&format=json" | jq '.')</code> does launch meld with the proper content.</cite>.
+This one-liner invokes the API of two wikis asking for info on siteinfo, general, extensions and skins; in json format.  Since that data is returned without any newlines, we use <code>jq</code> to pretty-print the json output.  Then it's an easy <code>meld</code> or <code>diff</code> to compare them.  The <code>--silent</code> option to <code>curl</code> just suppresses the connection and retrieval metadata; while the <code>-L</code> is customary to follow redirects.
 <syntaxhighlight lang="bash">
 A='https://wiki.freephile.org/wiki' B='https://www.mediawiki.org/w' API='/api.php?action=query&meta=siteinfo&siprop=general%7Cextensions%7Cskins&format=json' meld <(curl --silent -L "${A}${API}" | jq '.') <(curl --silent -L "${B}${API}" | jq '.')</syntaxhighlight>
+The wiki farm detection has changed (@fixme) on this site making it slightly different from mediawiki.org. Still, the one-liner should work but is failing silently whereas a manually executed substitution of <code>meld <(curl --silent -L "https://wiki.freephile.org/wiki/api.php?action=query&meta=siteinfo&siprop=general%7Cextensions%7Cskins&format=json" | jq '.') <(curl --silent -L "https://www.mediawiki.org/w/api.php?action=query&meta=siteinfo&siprop=general%7Cextensions%7Cskins&format=json" | jq '.')</code> does launch meld with the proper content.
+Using more than a single line of code, you can do things with PHP's <code>yaml_parse</code> such as [https://github.com/freephile/meza/blob/37b9be51289b16868730cbc1070a188159323ee7/src/scripts/findDupesInLocalExtensions.php src/scripts/findDupesInLocalExtensions.php]
 ==Perl edit==
@@ Line 94: / Line 99: @@
 </syntaxhighlight>
+== Find with exclusions ==
+Trying to fix [[permissions]], I wanted to see if there were any executable files in the 'data' directory. It turned out that every file in the elasticsearch and uploads directories were +x somehow. So, I wanted to exclude those dirs and see if there was anything else.
+<syntaxhighlight lang="bash">
+sudo find /opt/data-meza/ \( -name uploads -o -name elasticsearch \) -prune -o -type f -perm -ugo=x -ls
+</syntaxhighlight>
 {{References}}