Add "base" types for py envs.

Author: ericsnowcurrently

src/client/pythonEnvironments/base/index.ts

@@ -0,0 +1,130 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+import { Architecture } from '../../common/utils/platform';
+import { Version, VersionInfo } from '../../common/utils/version';
+
+/**
+ * IDs for the various supported Python environments.
+ */
+export enum PythonEnvKind {
+    Unknown = 'unknown',
+    // "global"
+    System = 'global-system',
+    MacDefault = 'global-mac-default',
+    WindowsStore = 'global-windows-store',
+    Pyenv = 'global-pyenv',
+    CondaBase = 'global-conda-base',
+    Custom = 'global-custom',
+    OtherGlobal = 'global-other',
+    // "virtual"
+    Venv = 'virt-venv',
+    VirtualEnv = 'virt-virtualenv',
+    Pipenv = 'virt-pipenv',
+    Conda = 'virt-conda',
+    OtherVirtual = 'virt-other'
+}
+
+/**
+ * Information about a Python binary/executable.
+ */
+export type PythonExecutableInfo = {
+    filename: string;
+    sysPrefix: string;
+};
+
+/**
+ * A (system-global) unique ID for a single Python environment.
+ */
+export type PythonEnvID = string;
+
+/**
+ * The most fundamental information about a Python environment.
+ *
+ * You should expect these objects to be complete (no empty props).
+ * Note that either `name` or `location` must be non-empty, though
+ * the other *can* be empty.
+ *
+ * @prop id - the env's unique ID
+ * @prop kind - the env's kind
+ * @prop executable - info about the env's Python binary
+ * @prop name - the env's distro-specific name, if any
+ * @prop location - the env's location (on disk), if relevant
+ */
+export type PythonEnvBaseInfo = {
+    id: PythonEnvID;
+    kind: PythonEnvKind;
+    executable: PythonExecutableInfo;
+    // One of (name, location) must be non-empty.
+    name: string;
+    location: string;
+    // Other possible fields:
+    // * managed: boolean (if the env is "managed")
+    // * parent: PythonEnvBaseInfo (the env from which this one was created)
+    // * binDir: string (where env-installed executables are found)
+};
+
+/**
+ * Release information for a Python version.
+ */
+export type PythonVersionRelease = {
+    level: 'alpha' | 'beta' | 'candidate' | 'final';
+    serial: number;
+};
+
+/**
+ * Version information for a Python build/installation.
+ *
+ * @prop sysVersion - the raw text from `sys.version`
+ */
+export type PythonVersion = VersionInfo & {
+    release: PythonVersionRelease;
+    sysVersion?: string;
+};
+
+/**
+ * Information for a Python build/installation.
+ */
+export type PythonBuildInfo = {
+    version: PythonVersion; // incl. raw, AKA sys.version
+    arch: Architecture;
+};
+
+/**
+ * Meta information about a Python distribution.
+ *
+ * @prop org - the name of the distro's creator/publisher
+ * @prop defaultDisplayName - the text to use when showing the distro to users
+ */
+export type PythonDistroMetaInfo = {
+    org: string;
+    defaultDisplayName?: string;
+};
+
+/**
+ * Information about an installed Python distribution.
+ *
+ * @prop version - the installed *distro* version (not the Python version)
+ * @prop binDir - where to look for the distro's executables (i.e. tools)
+ */
+export type PythonDistroInfo = PythonDistroMetaInfo & {
+    version?: Version;
+    binDir?: string;
+};
+
+type _PythonEnvInfo = PythonEnvBaseInfo & PythonBuildInfo;
+
+/**
+ * All the available information about a Python environment.
+ *
+ * Note that not all the information will necessarily be filled in.
+ * Locators are only required to fill in the "base" info, though
+ * they will usually be able to provide the version as well.
+ *
+ * @prop distro - the installed Python distro that this env is using or belongs to
+ * @prop defaultDisplayName - the text to use when showing the env to users
+ */
+export type PythonEnvInfo = _PythonEnvInfo & {
+    distro: PythonDistroInfo;
+    defaultDisplayName?: string;
+};