Search and replace multiple line items within a range?

Question

The following search command will make a range and search/replace within it. Specifically, it looks for 'first' in the text, then stops when it finds 'second' across multiple lines. Then, within that range of selected things, it will replace foo with bar. What I'm not sure how to do is to replace all occurrences of foo on each line with bar. I've tried using /%s/ instead of /s/ What am I missing?

:/first/;/second/s/foo/bar

Answer 1

UPDATE

So I have found simpler solution:

:/first/,/second/g/bar/s/foo/bar/g

1. /first/,/second/ take a range between first and second
2. g/bar/ filter out lines that do not have bar (keep lines that has bars)
3. s/foo/bar/g substitute all foos with bars within filtered lines.

Old solution

It is kind of tricky and probably would be much easier if :g command could be used recursively with the ranges. But it can't.

You can try the following:

:/first/,/second/s/\(bar.*\zsfoo\ze\)\|\(\zsfoo\ze .*bar\)/bar/g

1. range from first to second
2. substitute foos only if the line has bar before foo or after foo

I have tested it with the following:

foo bar foo bar bar

first
foo bar foo bar bar
hello foo foo world
hello foo hlkj sdklfj bar fooworld
foo bar foo bar bar
foo bar foo bar bar
second

foo bar foo bar bar
foo bar foo bar bar
foo bar foo bar bar

After the substitution:

foo bar foo bar bar

first
bar bar bar bar bar
hello foo foo world
hello bar hlkj sdklfj bar barworld
bar bar bar bar bar
bar bar bar bar bar
second

foo bar foo bar bar
foo bar foo bar bar
foo bar foo bar bar

Answer 2

As @ChristianBrabandt mentioned in a comment, you need to use the g flag to the :substitute command:

:/first/;/second/s/foo/bar/g

See :h :s_flags for details on this and other flags you can use with :s commands.