LocalRunGuide.md · zhang.xionghui/Stirling-PDF

To run the application without Docker/Podman, you will need to manually install all dependencies and build the necessary components.

Note that some dependencies might not be available in the standard repositories of all Linux distributions, and may require additional steps to install.

The following guide assumes you have a basic understanding of using a command line interface in your operating system.

It should work on most Linux distributions and MacOS. For Windows, you might need to use Windows Subsystem for Linux (WSL) for certain steps.
The amount of dependencies is to actually reduce overall size, ie installing LibreOffice sub components rather than full LibreOffice package.

You could theoretically use a Distrobox/Toolbox, if your Distribution has old or not all Packages. But you might just as well use the Docker Container then.

### Step 1: Prerequisites

Install the following software, if not already installed:

- Java 17 or later (21 recommended)

- Gradle 7.0 or later (included within repo so not needed on server)

- Git

- Python 3.8 (with pip)

- Make

- GCC/G++

- Automake

- Autoconf

- libtool

- pkg-config

- zlib1g-dev

- libleptonica-dev

For Debian-based systems, you can use the following command:

```bash
sudo apt-get update
sudo apt-get install -y git  automake  autoconf  libtool  libleptonica-dev  pkg-config zlib1g-dev make g++ openjdk-21-jdk python3 python3-pip
```

For Fedora-based systems use this command:

```bash
sudo dnf install -y git automake autoconf libtool leptonica-devel pkg-config zlib-devel make gcc-c++ java-21-openjdk python3 python3-pip
```

For non-root users with Nix Package Manager, use the following command:
```bash
nix-channel --update
nix-env -iA nixpkgs.jdk21 nixpkgs.git nixpkgs.python38 nixpkgs.gnumake nixpkgs.libgcc nixpkgs.automake nixpkgs.autoconf nixpkgs.libtool nixpkgs.pkg-config nixpkgs.zlib nixpkgs.leptonica
```

### Step 2: Clone and Build jbig2enc (Only required for certain OCR functionality)

For Debian and Fedora, you can build it from source using the following commands:

```bash
mkdir ~/.git
cd ~/.git &&\
git clone https://github.com/agl/jbig2enc.git &&\
cd jbig2enc &&\
./autogen.sh &&\
./configure &&\
make &&\
sudo make install
```

For Nix, you will face `Leptonica not detected`. Bypass this by installing it directly using the following command:
```bash
nix-env -iA nixpkgs.jbig2enc
```

### Step 3: Install Additional Software
Next we need to install LibreOffice for conversions, ocrmypdf for OCR, and opencv for pattern recognition functionality.

Install the following software:

- libreoffice-core

- libreoffice-common

- libreoffice-writer

- libreoffice-calc

- libreoffice-impress

- python3-uno

- unoconv

- pngquant

- unpaper

- ocrmypdf

- opencv-python-headless

For Debian-based systems, you can use the following command:

```bash
sudo apt-get install -y libreoffice-writer libreoffice-calc libreoffice-impress unpaper ocrmypdf
pip3 install uno opencv-python-headless unoconv pngquant WeasyPrint --break-system-packages
```

For Fedora:

```bash
sudo dnf install -y libreoffice-writer libreoffice-calc libreoffice-impress unpaper ocrmypdf
pip3 install uno opencv-python-headless unoconv pngquant WeasyPrint
```

For Nix:

```bash
nix-env -iA nixpkgs.unpaper nixpkgs.libreoffice nixpkgs.ocrmypdf nixpkgs.poppler_utils
pip3 install uno opencv-python-headless unoconv pngquant WeasyPrint
```

### Step 4: Clone and Build Stirling-PDF

```bash
cd ~/.git &&\
git clone https://github.com/Stirling-Tools/Stirling-PDF.git &&\
cd Stirling-PDF &&\
chmod +x ./gradlew &&\
./gradlew build
```

### Step 5: Move jar to desired location

After the build process, a `.jar` file will be generated in the `build/libs` directory.
You can move this file to a desired location, for example, `/opt/Stirling-PDF/`.
You must also move the Script folder within the Stirling-PDF repo that you have downloaded to this directory.
This folder is required for the python scripts using OpenCV.

```bash
sudo mkdir /opt/Stirling-PDF &&\
sudo mv ./build/libs/Stirling-PDF-*.jar /opt/Stirling-PDF/ &&\
sudo mv scripts /opt/Stirling-PDF/ &&\
echo "Scripts installed."
```

For non-root users, you can just keep the jar in the main directory of Stirling-PDF using the following command:
```bash
mv ./build/libs/Stirling-PDF-*.jar ./Stirling-PDF-*.jar
```

### Step 6: Other files
#### OCR
If you plan to use the OCR (Optical Character Recognition) functionality, you might need to install language packs for Tesseract if running non-english scanning.

##### Installing Language Packs
Easiest is to use the langpacks provided by your repositories. Skip the other steps.

Manual:

1. Download the desired language pack(s) by selecting the `.traineddata` file(s) for the language(s) you need.
2. Place the `.traineddata` files in the Tesseract tessdata directory: `/usr/share/tessdata`
3. Please view  [OCRmyPDF install guide](https://ocrmypdf.readthedocs.io/en/latest/installation.html) for more info.

**IMPORTANT:** DO NOT REMOVE EXISTING `eng.traineddata`, IT'S REQUIRED.

Debian based systems, install languages with this command:

```bash
sudo apt update &&\
# All languages
# sudo apt install -y 'tesseract-ocr-*'

# Find languages:
apt search tesseract-ocr-

# View installed languages:
dpkg-query -W tesseract-ocr- | sed 's/tesseract-ocr-//g'
```

Fedora:

```bash
# All languages
# sudo dnf install -y tesseract-langpack-*

# Find languages:
dnf search -C tesseract-langpack-

# View installed languages:
rpm -qa | grep tesseract-langpack | sed 's/tesseract-langpack-//g'
```

Nix:

```bash
nix-env -iA nixpkgs.tesseract
```

**Note:** Nix Package Manager pre-installs almost all the language packs when tesseract is installed.

### Step 7: Run Stirling-PDF

Those who have pushed to the root directory, run the following commands:

```bash
./gradlew bootRun
or
java -jar /opt/Stirling-PDF/Stirling-PDF-*.jar
```

Since libreoffice, soffice, and conversion tools have their dbus_tmp_dir set as `dbus_tmp_dir="/run/user/$(id -u)/libreoffice-dbus"`, you might get the following error when using their endpoints:
```
[Thread-7] INFO  s.s.SPDF.utils.ProcessExecutor - mkdir: cannot create directory ‘/run/user/1501’: Permission denied
```
To resolve this, before starting the Stirling-PDF, you have to set the environment variable to a directory you have write access to by using the following commands:

```bash
mkdir temp
export DBUS_SESSION_BUS_ADDRESS="unix:path=./temp"
./gradlew bootRun
or
java -jar ./Stirling-PDF-*.jar
```

### Step 8: Adding a Desktop icon

This will add a modified Appstarter to your Appmenu.
```bash
location=$(pwd)/gradlew
image=$(pwd)/docs/stirling-transparent.svg

cat > ~/.local/share/applications/Stirling-PDF.desktop <<EOF
[Desktop Entry]
Name=Stirling PDF;
GenericName=Launch StirlingPDF and open its WebGUI;
Category=Office;
Exec=xdg-open http://localhost:8080 && nohup $location bootRun &;
Icon=$image;
Keywords=pdf;
Type=Application;
NoDisplay=false;
Terminal=true;
EOF
```

Note: Currently the app will run in the background until manually closed.

### Optional: Changing the host and port of the application:

To override the default configuration, you can add the following to `/.git/Stirling-PDF/configs/custom_settings.yml` file:

```bash
server:
  host: 0.0.0.0
  port: 3000
```

**Note:** This file is created after the first application launch. To have it before that, you can create the directory and add the file yourself.

### Optional: Run Stirling-PDF as a service (requires root).

First create a .env file, where you can store environment variables:
```
touch /opt/Stirling-PDF/.env
```
In this file you can add all variables, one variable per line, as stated in the main readme (for example SYSTEM_DEFAULTLOCALE="de-DE").

Create a new file where we store our service settings and open it with nano editor:
```
nano /etc/systemd/system/stirlingpdf.service
```

Paste this content, make sure to update the filename of the jar-file. Press Ctrl+S and Ctrl+X to save and exit the nano editor:
```
[Unit]
Description=Stirling-PDF service
After=syslog.target network.target

[Service]
SuccessExitStatus=143

User=root
Group=root

Type=simple

EnvironmentFile=/opt/Stirling-PDF/.env
WorkingDirectory=/opt/Stirling-PDF
ExecStart=/usr/bin/java -jar Stirling-PDF-0.17.2.jar
ExecStop=/bin/kill -15 $MAINPID

[Install]
WantedBy=multi-user.target
```

Notify systemd that it has to rebuild its internal service database (you have to run this command every time you make a change in the service file):

```
sudo systemctl daemon-reload
```

Enable the service to tell the service to start it automatically:
```
sudo systemctl enable stirlingpdf.service
```

See the status of the service:
```
sudo systemctl status stirlingpdf.service
```

Manually start/stop/restart the service:
```
sudo systemctl start stirlingpdf.service
sudo systemctl stop stirlingpdf.service
sudo systemctl restart stirlingpdf.service
```

---

Remember to set the necessary environment variables before running the project if you want to customize the application the list can be seen in the main readme.

You can do this in the terminal by using the `export` command or -D argument to java -jar command:

```bash
export APP_HOME_NAME="Stirling PDF"
or
-DAPP_HOME_NAME="Stirling PDF"
```

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