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react/scripts/flow/createFlowConfigs.js at main · react/react · GitHub
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createFlowConfigs.js
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flow
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createFlowConfigs.js
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/**
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
'use strict'
;
const
chalk
=
require
(
'chalk'
)
;
const
fs
=
require
(
'fs'
)
;
const
path
=
require
(
'path'
)
;
const
mkdirp
=
require
(
'mkdirp'
)
;
const
inlinedHostConfigs
=
require
(
'../shared/inlinedHostConfigs'
)
;
const
flowVersion
=
require
(
'../../package.json'
)
.
devDependencies
[
'flow-bin'
]
;
const
configTemplate
=
fs
.
readFileSync
(
__dirname
+
'/config/flowconfig'
)
.
toString
(
)
;
// stores all forks discovered during config generation
const
allForks
=
new
Set
(
)
;
// maps forked file to the base path containing it and it's forks (it's parent)
const
forkedFiles
=
new
Map
(
)
;
function
findForks
(
file
)
{
const
basePath
=
path
.
join
(
file
,
'..'
)
;
const
forksPath
=
path
.
join
(
basePath
,
'forks'
)
;
const
forks
=
fs
.
readdirSync
(
path
.
join
(
'packages'
,
forksPath
)
)
;
forks
.
forEach
(
f
=>
allForks
.
add
(
'forks/'
+
f
)
)
;
forkedFiles
.
set
(
file
,
basePath
)
;
return
basePath
;
}
function
addFork
(
forks
,
renderer
,
file
)
{
let
basePath
=
forkedFiles
.
get
(
file
)
;
if
(
!
basePath
)
{
basePath
=
findForks
(
file
)
;
}
const
baseFilename
=
file
.
slice
(
basePath
.
length
+
1
)
;
const
parts
=
renderer
.
split
(
'-'
)
;
while
(
parts
.
length
)
{
const
candidate
=
`forks/
${
baseFilename
}
.
${
parts
.
join
(
'-'
)
}
.js`
;
if
(
allForks
.
has
(
candidate
)
)
{
forks
.
set
(
candidate
,
`
${
baseFilename
}
$$`
)
;
return
;
}
parts
.
pop
(
)
;
}
throw
new
Error
(
`Cannot find fork for
${
file
}
for renderer
${
renderer
}
`
)
;
}
function
writeConfig
(
renderer
,
rendererInfo
,
isServerSupported
,
isFlightSupported
,
)
{
const
folder
=
__dirname
+
'/'
+
renderer
;
mkdirp
.
sync
(
folder
)
;
isFlightSupported
=
isFlightSupported
===
true
||
(
isServerSupported
&&
isFlightSupported
!==
false
)
;
const
serverRenderer
=
isServerSupported
?
renderer
:
'custom'
;
const
flightRenderer
=
isFlightSupported
?
renderer
:
'custom'
;
const
ignoredPaths
=
[
]
;
inlinedHostConfigs
.
forEach
(
otherRenderer
=>
{
if
(
otherRenderer
===
rendererInfo
)
{
return
;
}
otherRenderer
.
paths
.
forEach
(
otherPath
=>
{
if
(
rendererInfo
.
paths
.
indexOf
(
otherPath
)
!==
-
1
)
{
return
;
}
ignoredPaths
.
push
(
`.*/packages/
${
otherPath
}
`
)
;
}
)
;
}
)
;
const
forks
=
new
Map
(
)
;
addFork
(
forks
,
renderer
,
'react-reconciler/src/ReactFiberConfig'
)
;
addFork
(
forks
,
serverRenderer
,
'react-server/src/ReactServerStreamConfig'
)
;
addFork
(
forks
,
serverRenderer
,
'react-server/src/ReactFizzConfig'
)
;
addFork
(
forks
,
flightRenderer
,
'react-server/src/ReactFlightServerConfig'
)
;
addFork
(
forks
,
flightRenderer
,
'react-client/src/ReactFlightClientConfig'
)
;
forks
.
set
(
'react-devtools-shared/src/config/DevToolsFeatureFlags.default'
,
'react-devtools-feature-flags'
,
)
;
allForks
.
forEach
(
fork
=>
{
if
(
!
forks
.
has
(
fork
)
)
{
ignoredPaths
.
push
(
`.*/packages/.*/
${
fork
}
`
)
;
}
}
)
;
let
moduleMappings
=
''
;
forks
.
forEach
(
(
source
,
target
)
=>
{
moduleMappings
+=
`module.name_mapper='
${
source
.
slice
(
source
.
lastIndexOf
(
'/'
)
+
1
,
)
}
' -> '
${
target
}
'\n`
;
}
)
;
const
config
=
configTemplate
.
replace
(
'%REACT_RENDERER_FLOW_OPTIONS%'
,
moduleMappings
.
trim
(
)
)
.
replace
(
'%REACT_RENDERER_FLOW_IGNORES%'
,
ignoredPaths
.
join
(
'\n'
)
)
.
replace
(
'%FLOW_VERSION%'
,
flowVersion
)
;
const
disclaimer
=
`
# ---------------------------------------------------------------#
# NOTE: this file is generated. #
# If you want to edit it, open ./scripts/flow/config/flowconfig. #
# Then run Yarn for changes to take effect. #
# ---------------------------------------------------------------#
`
.
trim
(
)
;
const
configFile
=
folder
+
'/.flowconfig'
;
let
oldConfig
;
try
{
oldConfig
=
fs
.
readFileSync
(
configFile
)
.
toString
(
)
;
}
catch
(
err
)
{
oldConfig
=
null
;
}
const
newConfig
=
`
${
disclaimer
}
${
config
}
${
disclaimer
}
`
.
trim
(
)
;
if
(
newConfig
!==
oldConfig
)
{
fs
.
writeFileSync
(
configFile
,
newConfig
)
;
console
.
log
(
chalk
.
dim
(
'Wrote a Flow config to '
+
configFile
)
)
;
}
}
// Write multiple configs in different folders
// so that we can run those checks in parallel if we want.
inlinedHostConfigs
.
forEach
(
rendererInfo
=>
{
if
(
rendererInfo
.
isFlowTyped
)
{
writeConfig
(
rendererInfo
.
shortName
,
rendererInfo
,
rendererInfo
.
isServerSupported
,
rendererInfo
.
isFlightSupported
,
)
;
}
}
)
;
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