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tinyify
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index.js
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'use strict'
const
packFlat
=
require
(
'browser-pack-flat/plugin'
)
const
collapser
=
require
(
'bundle-collapser/plugin'
)
const
packFlatStream
=
require
(
'browser-pack-flat'
)
const
commonShake
=
require
(
'common-shakeify'
)
const
unassertify
=
require
(
'unassertify'
)
const
minifyStream
=
require
(
'minify-stream'
)
const
envify
=
require
(
'@browserify/envify/custom'
)
const
uglifyify
=
require
(
'@browserify/uglifyify'
)
function
getUglify
(
)
{
// For older Node.js versions, fall back to an earlier `terser` version.
let
uglify
=
null
try
{
Function
(
'var a = async () => {}'
)
// eslint-disable-line no-new-func
}
catch
(
_err
)
{
uglify
=
require
(
'terser'
)
}
return
uglify
}
function
makeUglifyOptions
(
debug
)
{
const
uglifyOpts
=
{
uglify
:
getUglify
(
)
,
output
:
{
ascii_only
:
true
}
,
mangle
:
{
safari10
:
true
}
}
if
(
!
debug
)
{
uglifyOpts
.
sourceMap
=
false
}
return
uglifyOpts
}
module
.
exports
=
function
(
b
,
opts
)
{
if
(
typeof
b
!==
'object'
)
{
throw
new
Error
(
'tinyify: must be used as a plugin, not a transform'
)
}
opts
=
Object
.
assign
(
{
flat
:
true
,
env
:
{
}
}
,
opts
)
const
env
=
Object
.
assign
(
{
NODE_ENV
:
'production'
}
,
process
.
env
,
opts
.
env
)
// Remove `assert()` calls.
b
.
transform
(
unassertify
,
{
global
:
true
}
)
// Replace `process.env.NODE_ENV` with "production".
b
.
transform
(
envify
(
env
)
,
{
global
:
true
}
)
// Remove dead code.
b
.
transform
(
uglifyify
,
{
uglify
:
getUglify
(
)
,
global
:
true
,
toplevel
:
true
,
// No need to mangle here, will do that at the end.
mangle
:
false
,
output
:
{
ascii_only
:
true
}
}
)
if
(
!
b
.
_options
.
fullPaths
)
{
if
(
opts
.
flat
)
{
// Output a flat bundle, without function wrappers for each module.
b
.
plugin
(
packFlat
)
}
else
{
// Replace file paths in require() calls with module IDs.
b
.
plugin
(
collapser
)
}
}
// Remove unused exports from modules.
b
.
plugin
(
commonShake
)
// Minify the final output.
const
uglifyOpts
=
makeUglifyOptions
(
b
.
_options
.
debug
)
b
.
pipeline
.
get
(
'pack'
)
.
push
(
minifyStream
(
uglifyOpts
)
)
}
module
.
exports
.
applyToPipeline
=
function
applyToPipeline
(
pipeline
,
opts
)
{
opts
=
Object
.
assign
(
{
flat
:
true
,
debug
:
false
,
basedir
:
process
.
cwd
(
)
}
,
opts
)
if
(
opts
.
flat
)
{
pipeline
.
get
(
'pack'
)
.
splice
(
0
,
1
,
packFlatStream
(
{
raw
:
true
,
debug
:
opts
.
debug
,
basedir
:
opts
.
basedir
}
)
)
}
// Minify the final output.
const
uglifyOpts
=
makeUglifyOptions
(
opts
.
debug
)
pipeline
.
get
(
'pack'
)
.
push
(
minifyStream
(
uglifyOpts
)
)
}
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