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github-bot/scripts/attempt-backport.js at master · dyna-dot/github-bot · GitHub
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attempt-backport.js
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'use strict'
const
{
spawn
}
=
require
(
'child_process'
)
const
debug
=
require
(
'debug'
)
(
'attempt-backport'
)
const
request
=
require
(
'request'
)
const
{
fetchExistingThenUpdatePr
,
removeLabelFromPR
,
getBotPrLabels
}
=
require
(
'../lib/node-repo'
)
const
enabledRepos
=
[
'node'
]
const
nodeVersions
=
[
{
version
:
7
}
,
{
version
:
6
,
lts
:
true
}
,
{
version
:
4
,
lts
:
true
}
]
const
queue
=
[
]
let
inProgress
=
false
module
.
exports
=
function
(
app
)
{
if
(
!
global
.
_node_repo_dir
)
return
app
.
on
(
'pull_request.opened'
,
handlePrUpdate
)
// Pull Request updates
app
.
on
(
'pull_request.synchronize'
,
handlePrUpdate
)
// to trigger polling manually
app
.
get
(
'/attempt-backport/pr/:owner/:repo/:id'
,
(
req
,
res
)
=>
{
const
owner
=
req
.
params
.
owner
const
repo
=
req
.
params
.
repo
const
prId
=
parseInt
(
req
.
params
.
id
,
10
)
const
options
=
{
owner
,
repo
,
prId
,
logger
:
req
.
log
}
if
(
~
enabledRepos
.
indexOf
(
repo
)
)
{
for
(
const
node
of
nodeVersions
)
{
queueAttemptBackport
(
options
,
node
.
version
,
!
!
node
.
lts
)
}
}
if
(
!
inProgress
)
processNextBackport
(
)
res
.
end
(
)
}
)
}
function
handlePrUpdate
(
event
,
owner
,
repo
)
{
if
(
!
~
enabledRepos
.
indexOf
(
repo
)
)
return
if
(
event
.
pull_request
.
base
.
ref
!==
'master'
)
return
const
prId
=
event
.
number
const
options
=
{
owner
,
repo
,
prId
,
logger
:
event
.
logger
}
debug
(
`/
${
owner
}
/
${
repo
}
/pull/
${
prId
}
sync`
)
for
(
const
node
of
nodeVersions
)
{
queueAttemptBackport
(
options
,
node
.
version
,
!
!
node
.
lts
)
}
if
(
!
inProgress
)
processNextBackport
(
)
}
function
processNextBackport
(
)
{
const
item
=
queue
.
shift
(
)
if
(
!
item
)
return
if
(
typeof
item
!==
'function'
)
{
debug
(
`item was not a function! - queue size:
${
queue
.
length
}
`
)
return
}
else
if
(
inProgress
)
{
debug
(
`was still in progress! - queue size:
${
queue
.
length
}
`
)
return
}
item
(
)
}
function
queueAttemptBackport
(
options
,
version
,
isLTS
)
{
queue
.
push
(
function
(
)
{
options
.
logger
.
debug
(
`processing a new backport to v
${
version
}
`
)
attemptBackport
(
options
,
version
,
isLTS
,
processNextBackport
)
}
)
}
function
attemptBackport
(
options
,
version
,
isLTS
,
cb
)
{
// Start
gitAmAbort
(
)
function
wrapCP
(
cmd
,
args
,
opts
,
callback
)
{
let
exited
=
false
if
(
arguments
.
length
===
3
)
{
callback
=
opts
opts
=
{
}
}
opts
.
cwd
=
global
.
_node_repo_dir
const
cp
=
spawn
(
cmd
,
args
,
opts
)
const
argsString
=
[
cmd
,
...
args
]
.
join
(
' '
)
cp
.
on
(
'error'
,
function
(
err
)
{
debug
(
`child_process err:
${
err
}
`
)
if
(
!
exited
)
onError
(
)
}
)
cp
.
on
(
'exit'
,
function
(
code
)
{
exited
=
true
if
(
!
cb
)
{
debug
(
`error before exit, code:
${
code
}
, on '
${
argsString
}
'`
)
return
}
else
if
(
code
>
0
)
{
debug
(
`exit code > 0:
${
code
}
, on '
${
argsString
}
'`
)
onError
(
)
return
}
callback
(
)
}
)
// Useful when debugging.
cp
.
stdout
.
on
(
'data'
,
(
data
)
=>
{
options
.
logger
.
debug
(
data
.
toString
(
)
)
}
)
cp
.
stderr
.
on
(
'data'
,
(
data
)
=>
{
options
.
logger
.
debug
(
data
.
toString
(
)
)
}
)
return
cp
}
function
onError
(
)
{
if
(
!
cb
)
return
const
_cb
=
cb
setImmediate
(
(
)
=>
{
options
.
logger
.
debug
(
`backport to
${
version
}
failed`
)
if
(
!
isLTS
)
{
options
.
logger
.
debug
(
`Should have added (but temporary disabled): dont-land-on-v
${
version
}
.x`
)
}
else
{
getBotPrLabels
(
options
,
(
err
,
ourLabels
)
=>
{
if
(
err
)
{
options
.
logger
.
error
(
err
,
'Error fetching existing bot labels'
)
return
}
const
label
=
`lts-watch-v
${
version
}
.x`
if
(
!
ourLabels
.
includes
(
label
)
)
return
removeLabelFromPR
(
options
,
label
)
}
)
}
setImmediate
(
(
)
=>
{
inProgress
=
false
_cb
(
)
}
)
}
)
cb
=
null
}
function
gitAmAbort
(
)
{
// TODO(Fishrock123): this should probably just merge into wrapCP
let
exited
=
false
options
.
logger
.
debug
(
'aborting any previous backport attempt...'
)
const
cp
=
spawn
(
'git'
,
[
'am'
,
'--abort'
]
,
{
cwd
:
global
.
_node_repo_dir
}
)
const
argsString
=
'git am --abort'
cp
.
on
(
'error'
,
function
(
err
)
{
debug
(
`child_process err:
${
err
}
`
)
if
(
!
exited
)
onError
(
)
}
)
cp
.
on
(
'exit'
,
function
(
code
)
{
exited
=
true
if
(
!
cb
)
{
debug
(
`error before exit, code:
${
code
}
, on '
${
argsString
}
'`
)
return
}
gitRemoteUpdate
(
)
}
)
}
function
gitRemoteUpdate
(
)
{
options
.
logger
.
debug
(
'updating git remotes...'
)
wrapCP
(
'git'
,
[
'remote'
,
'update'
,
'-p'
]
,
gitCheckout
)
}
function
gitCheckout
(
)
{
options
.
logger
.
debug
(
`checking out origin/v
${
version
}
.x-staging...`
)
wrapCP
(
'git'
,
[
'checkout'
,
`origin/v
${
version
}
.x-staging`
]
,
gitCleanFXD
)
}
function
gitCleanFXD
(
)
{
wrapCP
(
'git'
,
[
'clean'
,
'-fdx'
]
,
fetchDiff
)
}
function
fetchDiff
(
)
{
options
.
logger
.
debug
(
`fetching diff from pr
${
options
.
prId
}
...`
)
const
url
=
`https://patch-diff.githubusercontent.com/raw/
${
options
.
owner
}
/
${
options
.
repo
}
/pull/
${
options
.
prId
}
.patch`
const
req
=
request
(
url
)
req
.
on
(
'error'
,
function
(
err
)
{
debug
(
`request err:
${
err
}
`
)
return
onError
(
)
}
)
req
.
on
(
'response'
,
function
(
response
)
{
if
(
response
.
statusCode
!==
200
)
{
debug
(
`request non-200 status:
${
response
.
statusCode
}
`
)
return
onError
(
)
}
}
)
gitAttemptBackport
(
req
)
}
function
gitAttemptBackport
(
req
)
{
options
.
logger
.
debug
(
`attempting a backport to v
${
version
}
...`
)
const
cp
=
wrapCP
(
'git'
,
[
'am'
,
'-3'
]
,
{
stdio
:
'pipe'
}
,
function
done
(
)
{
// Success!
if
(
isLTS
)
{
fetchExistingThenUpdatePr
(
options
,
[
`lts-watch-v
${
version
}
.x`
]
)
}
else
{
getBotPrLabels
(
options
,
(
err
,
ourLabels
)
=>
{
if
(
err
)
{
options
.
logger
.
error
(
err
,
'Error fetching existing bot labels'
)
return
}
const
label
=
`dont-land-on-v
${
version
}
.x`
if
(
!
ourLabels
.
includes
(
label
)
)
return
removeLabelFromPR
(
options
,
label
)
}
)
}
setImmediate
(
(
)
=>
{
options
.
logger
.
debug
(
`backport to v
${
version
}
successful`
)
inProgress
=
false
cb
(
)
}
)
}
)
req
.
pipe
(
cp
.
stdin
)
}
}
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