Silva

---

Manual

The instanciation : matcher = Silva(pattern [, kind])

The instanciation of a matcher is done by the call of Silva with a pattern and an optional parameter which selects the kind of pattern, its default value is 'template', the following values are handled :

• 'identity' wraps the Lua string equality (==)
• 'lua' wraps the Lua regex (string.match)
• 'pcre' wraps the PCRE regex from Lrexlib-PCRE or Lrexlib-PCRE2
• 'shell' wraps the POSIX fnmatch() function (available via FFI or lunix or LuaPosix or implemented in plain Lua)
• 'template' wraps an URI Template (RFC 6570 - level 3) regex engine

Each kind of pattern is implemented as a plugin, so this list is easily extensible.

The match : matcher(str)

when str matches, it returns a table containing capture values or the whole string str, otherwise it returns nil.

Examples

with 'identity'

local Silva = require 'Silva'

local matcher = Silva('/index.html', 'identity')
print(matcher('/index.html'))  --> /index.html

with 'lua'

local Silva = require 'Silva'

local matcher = Silva('/%w+%.html', 'lua')
print(matcher('/lua.html'))  --> /lua.html

with 'lua' and capture

local Silva = require 'Silva'

local matcher = Silva('/foo/(%w+)', 'lua')
local capture = matcher('/foo/bar')
print(capture[1]) --> bar

with 'pcre'

local Silva = require 'Silva'

local matcher = Silva('/\\w+\\.html', 'pcre')
print(matcher('/lua.html'))  --> /lua.html

with 'pcre' and capture

local Silva = require 'Silva'

local matcher = Silva('/foo/(\\w+)', 'pcre')
local capture = matcher('/foo/bar')
print(capture[1]) --> bar

with 'template'

local Silva = require 'Silva'

local matcher = Silva('/foo/{var}', 'template')
local capture = matcher('/foo/bar')
print(capture.var) --> bar

local matcher = Silva('/foo/{path}{?query,number}')
local capture = matcher('/foo/bar?number=42&query=baz')
print(capture.path, capture.number, capture.query) --> bar   42    baz

with 'shell'

local Silva = require 'Silva'

local matcher = Silva('/?*.html', 'shell')
print(matcher('/shell.html'))  --> /shell.html

local matcher = Silva('/[Ff]oo[1-9][0-9]', 'shell')
print(matcher('/foo42'))  --> /foo42

glob / shell

local function glob (dirname, patt)
    return coroutine.wrap(function ()
        local sme = require'Silva'(patt, 'shell')
        for fname in require'lfs'.dir(dirname) do
            if sme(fname) then
                coroutine.yield(fname)
            end
        end
    end)
end

for k in glob('test', '*.lua') do
    print(k)
end

for k in glob('src/Silva', '*.lua') do
    print(k)
end