Update Dockerfile for binary build process

.gitignore

@@ -52,3 +52,7 @@ compile
 CMakeCache.txt
 cmake_install.cmake
 src/intern/.dirstamp
+
+# Docker build outputs
+*.tar.gz
+dxfrw-*.tar.gz

README.md

@@ -145,25 +145,45 @@ cmake --build . --config Release --target install
 
 ### Docker Build
 
-#### Build Docker Image:
+Build portable binaries for multiple OS distributions using Docker.
+
+> **Note:** Dockerfiles are in `docker/` directory. Build process updated from CentOS 7 (EOL) to AlmaLinux 9.
+
+**Available OS Distributions:**
+
+| OS | Tag | Use Case |
+|----|-----|----------|
+| AlmaLinux 9 | `almalinux` | RHEL/CentOS compatible (CentOS successor) |
+| Ubuntu 22.04 LTS | `ubuntu` | Debian/Ubuntu compatible |
+| Amazon Linux 2023 | `amazonlinux` | AWS optimized |
+| Alpine Linux | `alpine` | Lightweight musl-based |
+
+**Quick Start:**
 
 ```bash
-docker build --rm -t codelibs/libdxfrw .
+# Build for single OS (creates dxfrw-{os}.tar.gz)
+./docker/build-docker.sh run almalinux
+./docker/build-docker.sh run ubuntu
+
+# Build for all OS distributions
+./docker/build-docker.sh run all-os
+
+# Extract and install
+sudo tar xzf dxfrw-almalinux.tar.gz -C /opt
 ```
 
-#### Build Library Using Docker:
+**Manual Docker Commands (if needed):**
 
 ```bash
-docker run -t --rm -v `pwd`:/work codelibs/libdxfrw:latest /work/build.sh
+# Build image and library
+docker build -t codelibs/libdxfrw:ubuntu -f docker/Dockerfile.ubuntu .
+docker run -t --rm -v `pwd`:/work codelibs/libdxfrw:ubuntu /work/build.sh
 ```
 
-This creates `dxfrw.tar.gz`. Extract it under `/opt` or your preferred location.
-
-#### Push Docker Image:
+**Push to Docker Hub:**
 
 ```bash
-docker tag codelibs/libdxfrw codelibs/libdxfrw:centos7
-docker push codelibs/libdxfrw:centos7
+./docker/build-docker.sh push almalinux
 ```
 
 ## Installation
@@ -302,6 +322,59 @@ The source code in `dwg2dxf/` serves as a comprehensive reference implementation
 
 Extracts text information from DWG files.
 
+## Utility Scripts
+
+The library includes utility scripts in the `bin/` directory for extracting text content from DXF/DWG files.
+
+### dwg2txt - DWG to Text Converter
+
+Extracts text entities from DWG files:
+
+```bash
+# Usage
+./bin/dwg2txt <input.dwg> <output.txt>
+
+# Example
+./bin/dwg2txt drawing.dwg output.txt
+```
+
+**Requirements:**
+- `dwg2text` executable (built with the library)
+
+### dxf2txt - DXF to Text Converter
+
+Extracts text entities from DXF files:
+
+```bash
+# Usage
+./bin/dxf2txt <input.dxf> <output.txt>
+
+# Example
+./bin/dxf2txt drawing.dxf output.txt
+```
+
+**Requirements:**
+- Python 3.9 or later (minimum version across all Docker build environments)
+- `ezdxf` Python package: `pip install ezdxf`
+
+**Features:**
+- Supports both TEXT and MTEXT entities
+- Handles multiple DXF versions (R12 through 2018+)
+- Automatic encoding detection (UTF-8, CP932/Shift-JIS)
+- Preserves multi-line text formatting
+
+### Direct Python Usage
+
+You can also use the Python script directly:
+
+```bash
+# Install ezdxf if not already installed
+pip install ezdxf
+
+# Run the script
+python3 bin/dxf2txt.py input.dxf output.txt
+```
+
 ## Testing
 
 The library includes comprehensive tests covering various aspects:

bin/dwg2txt

@@ -1,9 +1,60 @@
 #!/bin/bash
+#
+# dwg2txt - Convert DWG files to text format
+# Uses dwg2text utility to extract text content from DWG files
+#
 
-INPUT_FILE=$1
-OUTPUT_FILE=$2
+set -e
 
-`dirname $0`/dwg2text $INPUT_FILE > $OUTPUT_FILE
-if [ $? != 0 ] ; then
-  echo > $OUTPUT_FILE
+# Get script directory
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+# Function to show usage
+usage() {
+    cat << EOF
+Usage: $0 <input.dwg> <output.txt>
+
+Convert DWG file to text format by extracting text entities.
+
+Arguments:
+  input.dwg   Input DWG file path
+  output.txt  Output text file path
+
+Example:
+  $0 drawing.dwg output.txt
+
+EOF
+    exit 1
+}
+
+# Check arguments
+if [ $# -ne 2 ]; then
+    echo "Error: Invalid number of arguments"
+    usage
+fi
+
+INPUT_FILE="$1"
+OUTPUT_FILE="$2"
+
+# Check if input file exists
+if [ ! -f "$INPUT_FILE" ]; then
+    echo "Error: Input file does not exist: $INPUT_FILE"
+    exit 1
+fi
+
+# Check if dwg2text exists
+DWG2TEXT="${SCRIPT_DIR}/dwg2text"
+if [ ! -x "$DWG2TEXT" ]; then
+    echo "Error: dwg2text utility not found or not executable: $DWG2TEXT"
+    exit 1
+fi
+
+# Convert DWG to text
+if "$DWG2TEXT" "$INPUT_FILE" > "$OUTPUT_FILE" 2>&1; then
+    echo "✓ Successfully converted: $OUTPUT_FILE"
+    exit 0
+else
+    echo "⚠ Warning: dwg2text failed, creating empty output file"
+    echo "" > "$OUTPUT_FILE"
+    exit 1
 fi

bin/dxf2txt

@@ -1,7 +1,74 @@
 #!/bin/bash
+#
+# dxf2txt - Convert DXF files to text format
+# Uses Python script to extract text content from DXF files
+#
 
-INPUT_FILE=$1
-OUTPUT_FILE=$2
+set -e
 
-python `dirname $0`/dxf2txt.py $INPUT_FILE $OUTPUT_FILE
+# Get script directory
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+# Function to show usage
+usage() {
+    cat << EOF
+Usage: $0 <input.dxf> <output.txt>
+
+Convert DXF file to text format by extracting text entities.
+
+Arguments:
+  input.dxf   Input DXF file path
+  output.txt  Output text file path
+
+Example:
+  $0 drawing.dxf output.txt
+
+Requirements:
+  - Python 3
+  - ezdxf Python package (pip install ezdxf)
+
+EOF
+    exit 1
+}
+
+# Check arguments
+if [ $# -ne 2 ]; then
+    echo "Error: Invalid number of arguments"
+    usage
+fi
+
+INPUT_FILE="$1"
+OUTPUT_FILE="$2"
+
+# Check if input file exists
+if [ ! -f "$INPUT_FILE" ]; then
+    echo "Error: Input file does not exist: $INPUT_FILE"
+    exit 1
+fi
+
+# Find Python interpreter
+PYTHON=""
+for cmd in python3 python; do
+    if command -v $cmd >/dev/null 2>&1; then
+        PYTHON=$cmd
+        break
+    fi
+done
+
+if [ -z "$PYTHON" ]; then
+    echo "Error: Python not found. Please install Python 3."
+    exit 1
+fi
+
+# Check if ezdxf is available
+if ! $PYTHON -c "import ezdxf" 2>/dev/null; then
+    echo "Error: ezdxf package not found. Please install it:"
+    echo "  pip install ezdxf"
+    exit 1
+fi
+
+# Convert DXF to text
+$PYTHON "${SCRIPT_DIR}/dxf2txt.py" "$INPUT_FILE" "$OUTPUT_FILE"
+
+echo "✓ Successfully converted: $OUTPUT_FILE"