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Temesvári Csanád 2023-07-05 13:44:59 +02:00
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<#
.Synopsis
Activate a Python virtual environment for the current PowerShell session.
.Description
Pushes the python executable for a virtual environment to the front of the
$Env:PATH environment variable and sets the prompt to signify that you are
in a Python virtual environment. Makes use of the command line switches as
well as the `pyvenv.cfg` file values present in the virtual environment.
.Parameter VenvDir
Path to the directory that contains the virtual environment to activate. The
default value for this is the parent of the directory that the Activate.ps1
script is located within.
.Parameter Prompt
The prompt prefix to display when this virtual environment is activated. By
default, this prompt is the name of the virtual environment folder (VenvDir)
surrounded by parentheses and followed by a single space (ie. '(.venv) ').
.Example
Activate.ps1
Activates the Python virtual environment that contains the Activate.ps1 script.
.Example
Activate.ps1 -Verbose
Activates the Python virtual environment that contains the Activate.ps1 script,
and shows extra information about the activation as it executes.
.Example
Activate.ps1 -VenvDir C:\Users\MyUser\Common\.venv
Activates the Python virtual environment located in the specified location.
.Example
Activate.ps1 -Prompt "MyPython"
Activates the Python virtual environment that contains the Activate.ps1 script,
and prefixes the current prompt with the specified string (surrounded in
parentheses) while the virtual environment is active.
.Notes
On Windows, it may be required to enable this Activate.ps1 script by setting the
execution policy for the user. You can do this by issuing the following PowerShell
command:
PS C:\> Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
For more information on Execution Policies:
https://go.microsoft.com/fwlink/?LinkID=135170
#>
Param(
[Parameter(Mandatory = $false)]
[String]
$VenvDir,
[Parameter(Mandatory = $false)]
[String]
$Prompt
)
<# Function declarations --------------------------------------------------- #>
<#
.Synopsis
Remove all shell session elements added by the Activate script, including the
addition of the virtual environment's Python executable from the beginning of
the PATH variable.
.Parameter NonDestructive
If present, do not remove this function from the global namespace for the
session.
#>
function global:deactivate ([switch]$NonDestructive) {
# Revert to original values
# The prior prompt:
if (Test-Path -Path Function:_OLD_VIRTUAL_PROMPT) {
Copy-Item -Path Function:_OLD_VIRTUAL_PROMPT -Destination Function:prompt
Remove-Item -Path Function:_OLD_VIRTUAL_PROMPT
}
# The prior PYTHONHOME:
if (Test-Path -Path Env:_OLD_VIRTUAL_PYTHONHOME) {
Copy-Item -Path Env:_OLD_VIRTUAL_PYTHONHOME -Destination Env:PYTHONHOME
Remove-Item -Path Env:_OLD_VIRTUAL_PYTHONHOME
}
# The prior PATH:
if (Test-Path -Path Env:_OLD_VIRTUAL_PATH) {
Copy-Item -Path Env:_OLD_VIRTUAL_PATH -Destination Env:PATH
Remove-Item -Path Env:_OLD_VIRTUAL_PATH
}
# Just remove the VIRTUAL_ENV altogether:
if (Test-Path -Path Env:VIRTUAL_ENV) {
Remove-Item -Path env:VIRTUAL_ENV
}
# Just remove the _PYTHON_VENV_PROMPT_PREFIX altogether:
if (Get-Variable -Name "_PYTHON_VENV_PROMPT_PREFIX" -ErrorAction SilentlyContinue) {
Remove-Variable -Name _PYTHON_VENV_PROMPT_PREFIX -Scope Global -Force
}
# Leave deactivate function in the global namespace if requested:
if (-not $NonDestructive) {
Remove-Item -Path function:deactivate
}
}
<#
.Description
Get-PyVenvConfig parses the values from the pyvenv.cfg file located in the
given folder, and returns them in a map.
For each line in the pyvenv.cfg file, if that line can be parsed into exactly
two strings separated by `=` (with any amount of whitespace surrounding the =)
then it is considered a `key = value` line. The left hand string is the key,
the right hand is the value.
If the value starts with a `'` or a `"` then the first and last character is
stripped from the value before being captured.
.Parameter ConfigDir
Path to the directory that contains the `pyvenv.cfg` file.
#>
function Get-PyVenvConfig(
[String]
$ConfigDir
) {
Write-Verbose "Given ConfigDir=$ConfigDir, obtain values in pyvenv.cfg"
# Ensure the file exists, and issue a warning if it doesn't (but still allow the function to continue).
$pyvenvConfigPath = Join-Path -Resolve -Path $ConfigDir -ChildPath 'pyvenv.cfg' -ErrorAction Continue
# An empty map will be returned if no config file is found.
$pyvenvConfig = @{ }
if ($pyvenvConfigPath) {
Write-Verbose "File exists, parse `key = value` lines"
$pyvenvConfigContent = Get-Content -Path $pyvenvConfigPath
$pyvenvConfigContent | ForEach-Object {
$keyval = $PSItem -split "\s*=\s*", 2
if ($keyval[0] -and $keyval[1]) {
$val = $keyval[1]
# Remove extraneous quotations around a string value.
if ("'""".Contains($val.Substring(0, 1))) {
$val = $val.Substring(1, $val.Length - 2)
}
$pyvenvConfig[$keyval[0]] = $val
Write-Verbose "Adding Key: '$($keyval[0])'='$val'"
}
}
}
return $pyvenvConfig
}
<# Begin Activate script --------------------------------------------------- #>
# Determine the containing directory of this script
$VenvExecPath = Split-Path -Parent $MyInvocation.MyCommand.Definition
$VenvExecDir = Get-Item -Path $VenvExecPath
Write-Verbose "Activation script is located in path: '$VenvExecPath'"
Write-Verbose "VenvExecDir Fullname: '$($VenvExecDir.FullName)"
Write-Verbose "VenvExecDir Name: '$($VenvExecDir.Name)"
# Set values required in priority: CmdLine, ConfigFile, Default
# First, get the location of the virtual environment, it might not be
# VenvExecDir if specified on the command line.
if ($VenvDir) {
Write-Verbose "VenvDir given as parameter, using '$VenvDir' to determine values"
}
else {
Write-Verbose "VenvDir not given as a parameter, using parent directory name as VenvDir."
$VenvDir = $VenvExecDir.Parent.FullName.TrimEnd("\\/")
Write-Verbose "VenvDir=$VenvDir"
}
# Next, read the `pyvenv.cfg` file to determine any required value such
# as `prompt`.
$pyvenvCfg = Get-PyVenvConfig -ConfigDir $VenvDir
# Next, set the prompt from the command line, or the config file, or
# just use the name of the virtual environment folder.
if ($Prompt) {
Write-Verbose "Prompt specified as argument, using '$Prompt'"
}
else {
Write-Verbose "Prompt not specified as argument to script, checking pyvenv.cfg value"
if ($pyvenvCfg -and $pyvenvCfg['prompt']) {
Write-Verbose " Setting based on value in pyvenv.cfg='$($pyvenvCfg['prompt'])'"
$Prompt = $pyvenvCfg['prompt'];
}
else {
Write-Verbose " Setting prompt based on parent's directory's name. (Is the directory name passed to venv module when creating the virutal environment)"
Write-Verbose " Got leaf-name of $VenvDir='$(Split-Path -Path $venvDir -Leaf)'"
$Prompt = Split-Path -Path $venvDir -Leaf
}
}
Write-Verbose "Prompt = '$Prompt'"
Write-Verbose "VenvDir='$VenvDir'"
# Deactivate any currently active virtual environment, but leave the
# deactivate function in place.
deactivate -nondestructive
# Now set the environment variable VIRTUAL_ENV, used by many tools to determine
# that there is an activated venv.
$env:VIRTUAL_ENV = $VenvDir
if (-not $Env:VIRTUAL_ENV_DISABLE_PROMPT) {
Write-Verbose "Setting prompt to '$Prompt'"
# Set the prompt to include the env name
# Make sure _OLD_VIRTUAL_PROMPT is global
function global:_OLD_VIRTUAL_PROMPT { "" }
Copy-Item -Path function:prompt -Destination function:_OLD_VIRTUAL_PROMPT
New-Variable -Name _PYTHON_VENV_PROMPT_PREFIX -Description "Python virtual environment prompt prefix" -Scope Global -Option ReadOnly -Visibility Public -Value $Prompt
function global:prompt {
Write-Host -NoNewline -ForegroundColor Green "($_PYTHON_VENV_PROMPT_PREFIX) "
_OLD_VIRTUAL_PROMPT
}
}
# Clear PYTHONHOME
if (Test-Path -Path Env:PYTHONHOME) {
Copy-Item -Path Env:PYTHONHOME -Destination Env:_OLD_VIRTUAL_PYTHONHOME
Remove-Item -Path Env:PYTHONHOME
}
# Add the venv to the PATH
Copy-Item -Path Env:PATH -Destination Env:_OLD_VIRTUAL_PATH
$Env:PATH = "$VenvExecDir$([System.IO.Path]::PathSeparator)$Env:PATH"
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# SIG # End signature block

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# This file must be used with "source bin/activate" *from bash*
# you cannot run it directly
deactivate () {
# reset old environment variables
if [ -n "${_OLD_VIRTUAL_PATH:-}" ] ; then
PATH="${_OLD_VIRTUAL_PATH:-}"
export PATH
unset _OLD_VIRTUAL_PATH
fi
if [ -n "${_OLD_VIRTUAL_PYTHONHOME:-}" ] ; then
PYTHONHOME="${_OLD_VIRTUAL_PYTHONHOME:-}"
export PYTHONHOME
unset _OLD_VIRTUAL_PYTHONHOME
fi
# This should detect bash and zsh, which have a hash command that must
# be called to get it to forget past commands. Without forgetting
# past commands the $PATH changes we made may not be respected
if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
hash -r
fi
if [ -n "${_OLD_VIRTUAL_PS1:-}" ] ; then
PS1="${_OLD_VIRTUAL_PS1:-}"
export PS1
unset _OLD_VIRTUAL_PS1
fi
unset VIRTUAL_ENV
if [ ! "${1:-}" = "nondestructive" ] ; then
# Self destruct!
unset -f deactivate
fi
}
# unset irrelevant variables
deactivate nondestructive
VIRTUAL_ENV="C:\Users\Admin\Desktop\github\fastapi\fastapi"
export VIRTUAL_ENV
_OLD_VIRTUAL_PATH="$PATH"
PATH="$VIRTUAL_ENV/Scripts:$PATH"
export PATH
# unset PYTHONHOME if set
# this will fail if PYTHONHOME is set to the empty string (which is bad anyway)
# could use `if (set -u; : $PYTHONHOME) ;` in bash
if [ -n "${PYTHONHOME:-}" ] ; then
_OLD_VIRTUAL_PYTHONHOME="${PYTHONHOME:-}"
unset PYTHONHOME
fi
if [ -z "${VIRTUAL_ENV_DISABLE_PROMPT:-}" ] ; then
_OLD_VIRTUAL_PS1="${PS1:-}"
if [ "x(fastapi) " != x ] ; then
PS1="(fastapi) ${PS1:-}"
else
if [ "`basename \"$VIRTUAL_ENV\"`" = "__" ] ; then
# special case for Aspen magic directories
# see https://aspen.io/
PS1="[`basename \`dirname \"$VIRTUAL_ENV\"\``] $PS1"
else
PS1="(`basename \"$VIRTUAL_ENV\"`)$PS1"
fi
fi
export PS1
fi
# This should detect bash and zsh, which have a hash command that must
# be called to get it to forget past commands. Without forgetting
# past commands the $PATH changes we made may not be respected
if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
hash -r
fi

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@echo off
rem This file is UTF-8 encoded, so we need to update the current code page while executing it
for /f "tokens=2 delims=:." %%a in ('"%SystemRoot%\System32\chcp.com"') do (
set _OLD_CODEPAGE=%%a
)
if defined _OLD_CODEPAGE (
"%SystemRoot%\System32\chcp.com" 65001 > nul
)
set VIRTUAL_ENV=C:\Users\Admin\Desktop\github\fastapi\fastapi
if not defined PROMPT set PROMPT=$P$G
if defined _OLD_VIRTUAL_PROMPT set PROMPT=%_OLD_VIRTUAL_PROMPT%
if defined _OLD_VIRTUAL_PYTHONHOME set PYTHONHOME=%_OLD_VIRTUAL_PYTHONHOME%
set _OLD_VIRTUAL_PROMPT=%PROMPT%
set PROMPT=(fastapi) %PROMPT%
if defined PYTHONHOME set _OLD_VIRTUAL_PYTHONHOME=%PYTHONHOME%
set PYTHONHOME=
if defined _OLD_VIRTUAL_PATH set PATH=%_OLD_VIRTUAL_PATH%
if not defined _OLD_VIRTUAL_PATH set _OLD_VIRTUAL_PATH=%PATH%
set PATH=%VIRTUAL_ENV%\Scripts;%PATH%
:END
if defined _OLD_CODEPAGE (
"%SystemRoot%\System32\chcp.com" %_OLD_CODEPAGE% > nul
set _OLD_CODEPAGE=
)

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@ -1,21 +0,0 @@
@echo off
if defined _OLD_VIRTUAL_PROMPT (
set "PROMPT=%_OLD_VIRTUAL_PROMPT%"
)
set _OLD_VIRTUAL_PROMPT=
if defined _OLD_VIRTUAL_PYTHONHOME (
set "PYTHONHOME=%_OLD_VIRTUAL_PYTHONHOME%"
set _OLD_VIRTUAL_PYTHONHOME=
)
if defined _OLD_VIRTUAL_PATH (
set "PATH=%_OLD_VIRTUAL_PATH%"
)
set _OLD_VIRTUAL_PATH=
set VIRTUAL_ENV=
:END

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@ -1,291 +0,0 @@
#!c:\users\admin\desktop\github\fastapi\fastapi\scripts\python.exe
import datetime
import os
import sys
from getpass import getpass
from optparse import OptionParser
from peewee import *
from peewee import __version__ as peewee_version
from peewee import print_
from playhouse.cockroachdb import CockroachDatabase
from playhouse.reflection import *
HEADER = """from peewee import *%s
database = %s('%s'%s)
"""
BASE_MODEL = """\
class BaseModel(Model):
class Meta:
database = database
"""
UNKNOWN_FIELD = """\
class UnknownField(object):
def __init__(self, *_, **__): pass
"""
DATABASE_ALIASES = {
CockroachDatabase: ["cockroach", "cockroachdb", "crdb"],
MySQLDatabase: ["mysql", "mysqldb"],
PostgresqlDatabase: ["postgres", "postgresql"],
SqliteDatabase: ["sqlite", "sqlite3"],
}
DATABASE_MAP = {
value: key for key in DATABASE_ALIASES for value in DATABASE_ALIASES[key]
}
def make_introspector(database_type, database_name, **kwargs):
if database_type not in DATABASE_MAP:
err(
"Unrecognized database, must be one of: %s" % ", ".join(DATABASE_MAP.keys())
)
sys.exit(1)
schema = kwargs.pop("schema", None)
DatabaseClass = DATABASE_MAP[database_type]
db = DatabaseClass(database_name, **kwargs)
return Introspector.from_database(db, schema=schema)
def print_models(
introspector,
tables=None,
preserve_order=False,
include_views=False,
ignore_unknown=False,
snake_case=True,
):
database = introspector.introspect(
table_names=tables, include_views=include_views, snake_case=snake_case
)
db_kwargs = introspector.get_database_kwargs()
header = HEADER % (
introspector.get_additional_imports(),
introspector.get_database_class().__name__,
introspector.get_database_name(),
", **%s" % repr(db_kwargs) if db_kwargs else "",
)
print_(header)
if not ignore_unknown:
print_(UNKNOWN_FIELD)
print_(BASE_MODEL)
def _print_table(table, seen, accum=None):
accum = accum or []
foreign_keys = database.foreign_keys[table]
for foreign_key in foreign_keys:
dest = foreign_key.dest_table
# In the event the destination table has already been pushed
# for printing, then we have a reference cycle.
if dest in accum and table not in accum:
print_("# Possible reference cycle: %s" % dest)
# If this is not a self-referential foreign key, and we have
# not already processed the destination table, do so now.
if dest not in seen and dest not in accum:
seen.add(dest)
if dest != table:
_print_table(dest, seen, accum + [table])
print_("class %s(BaseModel):" % database.model_names[table])
columns = database.columns[table].items()
if not preserve_order:
columns = sorted(columns)
primary_keys = database.primary_keys[table]
for name, column in columns:
skip = all(
[
name in primary_keys,
name == "id",
len(primary_keys) == 1,
column.field_class in introspector.pk_classes,
]
)
if skip:
continue
if column.primary_key and len(primary_keys) > 1:
# If we have a CompositeKey, then we do not want to explicitly
# mark the columns as being primary keys.
column.primary_key = False
is_unknown = column.field_class is UnknownField
if is_unknown and ignore_unknown:
disp = "%s - %s" % (column.name, column.raw_column_type or "?")
print_(" # %s" % disp)
else:
print_(" %s" % column.get_field())
print_("")
print_(" class Meta:")
print_(" table_name = '%s'" % table)
multi_column_indexes = database.multi_column_indexes(table)
if multi_column_indexes:
print_(" indexes = (")
for fields, unique in sorted(multi_column_indexes):
print_(
" ((%s), %s),"
% (
", ".join("'%s'" % field for field in fields),
unique,
)
)
print_(" )")
if introspector.schema:
print_(" schema = '%s'" % introspector.schema)
if len(primary_keys) > 1:
pk_field_names = sorted(
[field.name for col, field in columns if col in primary_keys]
)
pk_list = ", ".join("'%s'" % pk for pk in pk_field_names)
print_(" primary_key = CompositeKey(%s)" % pk_list)
elif not primary_keys:
print_(" primary_key = False")
print_("")
seen.add(table)
seen = set()
for table in sorted(database.model_names.keys()):
if table not in seen:
if not tables or table in tables:
_print_table(table, seen)
def print_header(cmd_line, introspector):
timestamp = datetime.datetime.now()
print_("# Code generated by:")
print_("# python -m pwiz %s" % cmd_line)
print_("# Date: %s" % timestamp.strftime("%B %d, %Y %I:%M%p"))
print_("# Database: %s" % introspector.get_database_name())
print_("# Peewee version: %s" % peewee_version)
print_("")
def err(msg):
sys.stderr.write("\033[91m%s\033[0m\n" % msg)
sys.stderr.flush()
def get_option_parser():
parser = OptionParser(usage="usage: %prog [options] database_name")
ao = parser.add_option
ao("-H", "--host", dest="host")
ao("-p", "--port", dest="port", type="int")
ao("-u", "--user", dest="user")
ao("-P", "--password", dest="password", action="store_true")
engines = sorted(DATABASE_MAP)
ao(
"-e",
"--engine",
dest="engine",
choices=engines,
help=(
"Database type, e.g. sqlite, mysql, postgresql or cockroachdb. "
'Default is "postgresql".'
),
)
ao("-s", "--schema", dest="schema")
ao(
"-t",
"--tables",
dest="tables",
help=(
"Only generate the specified tables. Multiple table names should "
"be separated by commas."
),
)
ao(
"-v",
"--views",
dest="views",
action="store_true",
help="Generate model classes for VIEWs in addition to tables.",
)
ao(
"-i",
"--info",
dest="info",
action="store_true",
help=(
"Add database information and other metadata to top of the "
"generated file."
),
)
ao(
"-o",
"--preserve-order",
action="store_true",
dest="preserve_order",
help="Model definition column ordering matches source table.",
)
ao(
"-I",
"--ignore-unknown",
action="store_true",
dest="ignore_unknown",
help="Ignore fields whose type cannot be determined.",
)
ao(
"-L",
"--legacy-naming",
action="store_true",
dest="legacy_naming",
help="Use legacy table- and column-name generation.",
)
return parser
def get_connect_kwargs(options):
ops = ("host", "port", "user", "schema")
kwargs = {o: getattr(options, o) for o in ops if getattr(options, o)}
if options.password:
kwargs["password"] = getpass()
return kwargs
if __name__ == "__main__":
raw_argv = sys.argv
parser = get_option_parser()
options, args = parser.parse_args()
if len(args) < 1:
err('Missing required parameter "database"')
parser.print_help()
sys.exit(1)
connect = get_connect_kwargs(options)
database = args[-1]
tables = None
if options.tables:
tables = [table.strip() for table in options.tables.split(",") if table.strip()]
engine = options.engine
if engine is None:
engine = "sqlite" if os.path.exists(database) else "postgresql"
introspector = make_introspector(engine, database, **connect)
if options.info:
cmd_line = " ".join(raw_argv[1:])
print_header(cmd_line, introspector)
print_models(
introspector,
tables,
options.preserve_order,
options.views,
options.ignore_unknown,
not options.legacy_naming,
)

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