| 1 |
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| 2 | fs = require 'fs'
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| 3 | path = require 'path'
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| 4 | fs.exists ?= path.exists
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| 5 | each = require 'each'
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| 6 |
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| 7 | ###
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| 8 | Conditionnal properties
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| 9 | ###
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| 10 | module.exports =
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| 11 | ###
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| 12 |
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| 13 | `all(options, failed, succeed)` Run all conditions
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| 14 | ---------------------------------------------------
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| 15 |
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| 16 | `opts`
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| 17 | Command options
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| 18 |
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| 19 | `failed`
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| 20 | Failed callback, called when a condition failed
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| 21 |
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| 22 | `succeed`
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| 23 | Succeed callback, only called if all the condition succeed
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| 24 |
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| 25 | ###
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| 26 | all: (options, failed, succeed) ->
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| 27 | each([@if, @if_exists, @not_if_exists])
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| 28 | .on 'item', (condition, next) ->
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| 29 | condition(options, failed, next)
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| 30 | .on('error', failed)
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| 31 | .on('end', succeed)
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| 32 | ###
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| 33 | `if` Run action for a user defined condition
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| 34 | --------------------------------------------
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| 35 |
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| 36 | Work on the property `if` in `options`. When `if`
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| 37 | is a boolean, its value determine to the output. If it's
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| 38 | a callback, the function is called with the `options`,
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| 39 | `failed` and `succeed` arguments. If it'a an array, all its element
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| 40 | must positively resolve for the condition to pass.
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| 41 |
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| 42 | Updating the content of a file if we are the owner
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| 43 |
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| 44 | mecano.render
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| 45 | source:'./file'
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| 46 | if: (options, failed, succeed) ->
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| 47 | fs.stat options.source, (err, stat) ->
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| 48 | # File does not exists
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| 49 | return failed err if err
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| 50 | # Failed if we dont own the file
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| 51 | return failed() unless stat.uid is process.getuid()
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| 52 | # Succeed if we own the file
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| 53 | succeed()
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| 54 |
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| 55 | ###
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| 56 | if: (options, failed, succeed) ->
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| 57 | return succeed() unless options.if?
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| 58 | ok = true
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| 59 | each(options.if)
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| 60 | .on 'item', (si, next) ->
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| 61 | return next() unless ok
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| 62 | if typeof si is 'boolean'
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| 63 | ok = false unless si
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| 64 | next()
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| 65 | else if typeof si is 'function'
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| 66 | si options, ( -> ok = false; next arguments...), next
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| 67 | .on 'both', (err) ->
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| 68 | return failed err if err or not ok
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| 69 | succeed()
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| 70 | ###
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| 71 |
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| 72 | `if_exists` Run action if a file exists
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| 73 | ----------------------------------------
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| 74 |
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| 75 | Work on the property `if_exists` in `options`. The value may
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| 76 | be a file path or an array of file paths.
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| 77 |
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| 78 | The callback `succeed` is called if all the provided paths
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| 79 | exists otherwise the callback `failed` is called.
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| 80 |
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| 81 | ###
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| 82 | if_exists: (options, failed, succeed) ->
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| 83 | return succeed() unless options.if_exists?
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| 84 | each(options.if_exists)
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| 85 | .on 'item', (if_exists, next) ->
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| 86 | # await fs.exists if_exists, defer exists
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| 87 | # if exists then next() else failed()
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| 88 | fs.exists if_exists, (exists) ->
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| 89 | if exists then next() else failed()
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| 90 | .on 'end', succeed
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| 91 | ###
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| 92 |
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| 93 | `not_if_exists` Skip action if a file exists
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| 94 | ---------------------------------------------
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| 95 |
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| 96 | Work on the property `not_if_exists` in `options`. The value may
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| 97 | be a file path or an array of file paths.
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| 98 |
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| 99 | The callback `succeed` is called if none of the provided paths
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| 100 | exists otherwise the callback `failed` is called.
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| 101 |
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| 102 | ###
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| 103 | not_if_exists: (options, failed, succeed) ->
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| 104 | return succeed() unless options.not_if_exists?
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| 105 | each(options.not_if_exists)
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| 106 | .on 'item', (not_if_exists, next) ->
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| 107 | fs.exists not_if_exists, (exists) ->
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| 108 | if exists
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| 109 | then failed()
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| 110 | else next()
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| 111 | # await fs.exists not_if_exists, defer exists
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| 112 | # if exists then failed() else next()
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| 113 | .on 'end', succeed
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