Update get-poetry.py

docs/docs/index.md

@@ -36,27 +36,37 @@ Open a new shell and type the following:
 poetry --version
 poetry --version
 ```
 ```
 
 
-If you see something like `Poetry 0.11.4` then you are ready to use Poetry.
+If you see something like `Poetry 0.12.0` then you are ready to use Poetry.
 If you decide Poetry isn't your thing, you can completely remove it from your system
 If you decide Poetry isn't your thing, you can completely remove it from your system
-by running the installer again with the `--uninstall` option.
+by running the installer again with the `--uninstall` option or by setting
+the `POETRY_UNINSTALL` environment variable before executing the installer.
+
+```bash
+python get-poetry.py --uninstall
+POETRY_UNINSTALL=1 python get-poetry.py
+```
 
 
 !!!note
 !!!note
 
 
     Alternatively, you can download the `get-poetry.py` file and execute it separately.
     Alternatively, you can download the `get-poetry.py` file and execute it separately.
 
 
-    If you want to install prerelease versions, you can do so by passing `--preview` to `get-poetry.py`:
+    If you want to install prerelease versions, you can do so by passing `--preview` to `get-poetry.py`
+    or by using the `POETRY_PREVIEW` environement variable:
 
 
     ```bash
     ```bash
     python get-poetry.py --preview
     python get-poetry.py --preview
+    POETRY_PREVIEW=1 python get-poetry.py
     ```
     ```
 
 
-    Similarly, if you want to install a specific version, you can use `--version`:
+    Similarly, if you want to install a specific version, you can use `--version` or the `POETRY_VERSION`
+    environment variable:
 
 
     ```bash
     ```bash
-    python get-poetry.py --version 0.7.0
+    python get-poetry.py --version 0.12.0
+    POETRY_VERSION=0.12.0 python get-poetry.py
     ```
     ```
 
 
-    Note that the installer does not support Poetry releases < 12.0.
+    Note that the installer does not support Poetry releases < 0.12.0.
 
 
 ### Alternative installation methods (not recommended)
 ### Alternative installation methods (not recommended)
 
 

get-poetry.py

@@ -153,6 +153,12 @@ def temporary_directory(*args, **kwargs):
         shutil.rmtree(name)
         shutil.rmtree(name)
 
 
 
 
+def string_to_bool(value):
+    value = value.lower()
+
+    return value in {"true", "1", "y", "yes"}
+
+
 def expanduser(path):
 def expanduser(path):
     """
     """
     Expand ~ and ~user constructions.
     Expand ~ and ~user constructions.
@@ -809,12 +815,12 @@ def main():
 
 
     installer = Installer(
     installer = Installer(
         version=args.version or os.getenv("POETRY_VERSION"),
         version=args.version or os.getenv("POETRY_VERSION"),
-        preview=args.preview or os.getenv("POETRY_PREVIEW"),
+        preview=args.preview or string_to_bool(os.getenv("POETRY_PREVIEW", "0")),
         force=args.force,
         force=args.force,
-        accept_all=args.accept_all,
+        accept_all=args.accept_all or string_to_bool(os.getenv("POETRY_ACCEPT", "0")),
     )
     )
 
 
-    if args.uninstall:
+    if args.uninstall or string_to_bool(os.getenv("POETRY_UNINSTALL", "0")):
         return installer.uninstall()
         return installer.uninstall()
 
 
     return installer.run()
     return installer.run()