build: make dependencies for server optional

README.md

@@ -156,7 +156,7 @@ If you plan to code or train models, clone 🐸TTS and install it locally.
 
 ```bash
 git clone https://github.com/coqui-ai/TTS
-pip install -e .[all,dev,notebooks]  # Select the relevant extras
+pip install -e .[all,dev,notebooks,server]  # Select the relevant extras
 ```
 
 If you are on Ubuntu (Debian), you can also run following commands for installation.

TTS/server/README.md

@@ -1,5 +1,8 @@
 # :frog: TTS demo server
-Before you use the server, make sure you [install](https://github.com/coqui-ai/TTS/tree/dev#install-tts)) :frog: TTS properly. Then, you can follow the steps below.
+Before you use the server, make sure you
+[install](https://github.com/coqui-ai/TTS/tree/dev#install-tts)) :frog: TTS
+properly and install the additional dependencies with `pip install
+TTS[server]`. Then, you can follow the steps below.
 
 **Note:** If you install :frog:TTS using ```pip```, you can also use the ```tts-server``` end point on the terminal.
 

TTS/server/server.py

@@ -9,7 +9,10 @@ from threading import Lock
 from typing import Union
 from urllib.parse import parse_qs
 
-from flask import Flask, render_template, render_template_string, request, send_file
+try:
+    from flask import Flask, render_template, render_template_string, request, send_file
+except ImportError as e:
+    raise ImportError("Server requires requires flask, use `pip install TTS[server]`.") from e
 
 from TTS.config import load_config
 from TTS.utils.manage import ModelManager

docs/source/inference.md

@@ -84,8 +84,10 @@ tts --model_name "voice_conversion/<language>/<dataset>/<model_name>"
  <!-- <img src="https://raw.githubusercontent.com/coqui-ai/TTS/main/images/demo_server.gif" height="56"/> -->
 ![server.gif](https://github.com/coqui-ai/TTS/raw/main/images/demo_server.gif)
 
-You can boot up a demo 🐸TTS server to run an inference with your models. Note that the server is not optimized for performance
-but gives you an easy way to interact with the models.
+You can boot up a demo 🐸TTS server to run an inference with your models (make
+sure to install the additional dependencies with `pip install TTS[server]`).
+Note that the server is not optimized for performance but gives you an easy way
+to interact with the models.
 
 The demo server provides pretty much the same interface as the CLI command.
 

docs/source/installation.md

@@ -1,6 +1,6 @@
 # Installation
 
-🐸TTS supports python >=3.7 <3.11.0 and tested on Ubuntu 18.10, 19.10, 20.10.
+🐸TTS supports python >=3.9 <3.12.0 and tested on Ubuntu 18.10, 19.10, 20.10.
 
 ## Using `pip`
 
@@ -30,4 +30,4 @@ make install
 ```
 
 ## On Windows
-If you are on Windows, 👑@GuyPaddock wrote installation instructions [here](https://stackoverflow.com/questions/66726331/
+If you are on Windows, 👑@GuyPaddock wrote installation instructions [here](https://stackoverflow.com/questions/66726331/

docs/source/tutorial_for_nervous_beginners.md

@@ -112,8 +112,9 @@ $ tts --list_models  # list the available models.
 ![cli.gif](https://github.com/coqui-ai/TTS/raw/main/images/tts_cli.gif)
 
 
-You can call `tts-server` to start a local demo server that you can open it on
-your favorite web browser and 🗣️.
+You can call `tts-server` to start a local demo server that you can open on
+your favorite web browser and 🗣️ (make sure to install the additional
+dependencies with `pip install TTS[server]`).
 
 ```bash
 $ tts-server -h # see the help

requirements.txt

@@ -13,8 +13,6 @@ pyyaml>=6.0
 fsspec[http]>=2023.6.0 # <= 2023.9.1 makes aux tests fail
 packaging>=23.1
 mutagen==1.47.0
-# deps for examples
-flask>=2.0.1
 # deps for inference
 pysbd>=0.3.4
 # deps for notebooks

setup.py

@@ -66,7 +66,8 @@ with open(os.path.join(cwd, "requirements.dev.txt"), "r") as f:
     requirements_dev = f.readlines()
 with open(os.path.join(cwd, "requirements.ja.txt"), "r") as f:
     requirements_ja = f.readlines()
-requirements_all = requirements_dev + requirements_notebooks + requirements_ja
+requirements_server = ["flask>=2.0.1"]
+requirements_all = requirements_dev + requirements_notebooks + requirements_ja + requirements_server
 
 with open("README.md", "r", encoding="utf-8") as readme_file:
     README = readme_file.read()
@@ -115,6 +116,7 @@ setup(
         "all": requirements_all,
         "dev": requirements_dev,
         "notebooks": requirements_notebooks,
+        "server": requirements_server,
         "ja": requirements_ja,
     },
     python_requires=">=3.9.0, <3.12",