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I am trying to do a search and replace on a large database file where some of the urls are escaped and some not, e.g.:
http://www.example.com
http:\\/\\/www.example.com
I thought I could use a simple character class in a regex like this:
%s~http\(:[/\\]+www.example.com\)~https\1~g
But won't work no matter how I escape it. Can I use character classes in vim search and replace? If not, how can I match the url so that any amount of backslashes and forward slashes are matched?
In your search pattern of the :s part you are looking for www. which is not part of your source. So it won't match. Better would be to make that part optionally:
%s~http\(:[/\\]\+\(www.\)\?example.com\)~https\1~g
or even better:
%s~http:[/\\]\+\(\(www.\)\?example.com\)~https://\1~g
which will also normalize the slashes following the protocol part of your URI.
\s or \d in a character class. In Vim regex this [\d] means either a backslash or a d but does not stand for the character class [0-9]
Jul 24, 2017 at 19:54
Figured this out myself using alternation and \z for pattern matching:
%s,\zshttp\ze:\(/\|\\\)\+www.example.com,https,g
Hope this helps someone.
[/\\]and+.+just means a literal plus sign,\+is used for repetition of the preceding atom.