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setup-python/src/find-python.ts at v3.0.0 · dpdani/setup-python · GitHub
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import
*
as
os
from
'os'
;
import
*
as
path
from
'path'
;
import
{
IS_WINDOWS
,
IS_LINUX
}
from
'./utils'
;
import
*
as
semver
from
'semver'
;
import
*
as
installer
from
'./install-python'
;
import
*
as
core
from
'@actions/core'
;
import
*
as
tc
from
'@actions/tool-cache'
;
// Python has "scripts" or "bin" directories where command-line tools that come with packages are installed.
// This is where pip is, along with anything that pip installs.
// There is a seperate directory for `pip install --user`.
//
// For reference, these directories are as follows:
// macOS / Linux:
// <sys.prefix>/bin (by default /usr/local/bin, but not on hosted agents -- see the `else`)
// (--user) ~/.local/bin
// Windows:
// <Python installation dir>\Scripts
// (--user) %APPDATA%\Python\PythonXY\Scripts
// See https://docs.python.org/3/library/sysconfig.html
function
binDir
(
installDir
:
string
)
:
string
{
if
(
IS_WINDOWS
)
{
return
path
.
join
(
installDir
,
'Scripts'
)
;
}
else
{
return
path
.
join
(
installDir
,
'bin'
)
;
}
}
export
async
function
useCpythonVersion
(
version
:
string
,
architecture
:
string
)
:
Promise
<
InstalledVersion
>
{
const
desugaredVersionSpec
=
desugarDevVersion
(
version
)
;
const
semanticVersionSpec
=
pythonVersionToSemantic
(
desugaredVersionSpec
)
;
core
.
debug
(
`Semantic version spec of
${
version
}
is
${
semanticVersionSpec
}
`
)
;
let
installDir
:
string
|
null
=
tc
.
find
(
'Python'
,
semanticVersionSpec
,
architecture
)
;
if
(
!
installDir
)
{
core
.
info
(
`Version
${
semanticVersionSpec
}
was not found in the local cache`
)
;
const
foundRelease
=
await
installer
.
findReleaseFromManifest
(
semanticVersionSpec
,
architecture
)
;
if
(
foundRelease
&&
foundRelease
.
files
&&
foundRelease
.
files
.
length
>
0
)
{
core
.
info
(
`Version
${
semanticVersionSpec
}
is available for downloading`
)
;
await
installer
.
installCpythonFromRelease
(
foundRelease
)
;
installDir
=
tc
.
find
(
'Python'
,
semanticVersionSpec
,
architecture
)
;
}
}
if
(
!
installDir
)
{
throw
new
Error
(
[
`Version
${
version
}
with arch
${
architecture
}
not found`
,
`The list of all available versions can be found here:
${
installer
.
MANIFEST_URL
}
`
]
.
join
(
os
.
EOL
)
)
;
}
core
.
exportVariable
(
'pythonLocation'
,
installDir
)
;
if
(
IS_LINUX
)
{
const
libPath
=
process
.
env
.
LD_LIBRARY_PATH
?
`:
${
process
.
env
.
LD_LIBRARY_PATH
}
`
:
''
;
const
pyLibPath
=
path
.
join
(
installDir
,
'lib'
)
;
if
(
!
libPath
.
split
(
':'
)
.
includes
(
pyLibPath
)
)
{
core
.
exportVariable
(
'LD_LIBRARY_PATH'
,
pyLibPath
+
libPath
)
;
}
}
core
.
addPath
(
installDir
)
;
core
.
addPath
(
binDir
(
installDir
)
)
;
if
(
IS_WINDOWS
)
{
// Add --user directory
// `installDir` from tool cache should look like $RUNNER_TOOL_CACHE/Python/<semantic version>/x64/
// So if `findLocalTool` succeeded above, we must have a conformant `installDir`
const
version
=
path
.
basename
(
path
.
dirname
(
installDir
)
)
;
const
major
=
semver
.
major
(
version
)
;
const
minor
=
semver
.
minor
(
version
)
;
const
userScriptsDir
=
path
.
join
(
process
.
env
[
'APPDATA'
]
||
''
,
'Python'
,
`Python
${
major
}
${
minor
}
`
,
'Scripts'
)
;
core
.
addPath
(
userScriptsDir
)
;
}
// On Linux and macOS, pip will create the --user directory and add it to PATH as needed.
const
installed
=
versionFromPath
(
installDir
)
;
core
.
setOutput
(
'python-version'
,
installed
)
;
return
{
impl
:
'CPython'
,
version
:
installed
}
;
}
/** Convert versions like `3.8-dev` to a version like `>= 3.8.0-a0`. */
function
desugarDevVersion
(
versionSpec
:
string
)
{
if
(
versionSpec
.
endsWith
(
'-dev'
)
)
{
const
versionRoot
=
versionSpec
.
slice
(
0
,
-
'-dev'
.
length
)
;
return
`>=
${
versionRoot
}
.0-a0`
;
}
else
{
return
versionSpec
;
}
}
/** Extracts python version from install path from hosted tool cache as described in README.md */
function
versionFromPath
(
installDir
:
string
)
{
const
parts
=
installDir
.
split
(
path
.
sep
)
;
const
idx
=
parts
.
findIndex
(
part
=>
part
===
'PyPy'
||
part
===
'Python'
)
;
return
parts
[
idx
+
1
]
||
''
;
}
interface
InstalledVersion
{
impl
:
string
;
version
:
string
;
}
/**
* Python's prelease versions look like `3.7.0b2`.
* This is the one part of Python versioning that does not look like semantic versioning, which specifies `3.7.0-b2`.
* If the version spec contains prerelease versions, we need to convert them to the semantic version equivalent.
*/
export
function
pythonVersionToSemantic
(
versionSpec
:
string
)
{
const
prereleaseVersion
=
/
(
\d
+
\.
\d
+
\.
\d
+
)
(
(?:
a
|
b
|
r
c
)
\d
*
)
/
g
;
return
versionSpec
.
replace
(
prereleaseVersion
,
'$1-$2'
)
;
}
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