Include dockerfile templating

Author: coatless

inst/demo-py-shiny-containerization.R

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+# Create a simple Shiny for Python app
+app_dir <- tempdir()
+writeLines(
+  'from shiny import App, ui, render
+import numpy as np
+import matplotlib.pyplot as plt
+
+app_ui = ui.page_fluid(
+    ui.panel_title("Hello Docker"),
+    ui.layout_sidebar(
+        ui.sidebar(
+            ui.input_slider("obs", "Number of observations:", min=1, max=1000, value=500)
+        ),
+        ui.output_plot("distPlot")
+    )
+)
+
+def server(input, output, session):
+    @output
+    @render.plot
+    def distPlot():
+        data = np.random.normal(size=input.obs())
+        fig, ax = plt.subplots()
+        ax.hist(data)
+        return fig
+
+app = App(app_ui, server)',
+file.path(app_dir, "app.py")
+)
+
+# Export the app
+shinydocker::export(app_dir, run = TRUE, detached = TRUE)
+
+# Stop the container
+stop_container(app_dir)
+
+# Restart the container:
+shinydocker::run_container(app_dir, detach = TRUE)
+
+## Alternatively, steps can be run separately ----
+# Create Docker configuration
+# shinydocker::dockerize(app_dir)
+# Build Docker image
+# shinydocker::build_image(app_dir)
+# Run the containerized app
+# shinydocker::run_container(app_dir, detached = TRUE)

inst/demo-r-shiny-containerization.R

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+# Create a simple Shiny app
+app_dir <- tempdir()
+writeLines(
+  'library(shiny)
+   
+   ui <- fluidPage(
+     titlePanel("Hello Docker"),
+     sidebarLayout(
+       sidebarPanel(
+         sliderInput("obs", "Number of observations:", 
+                     min = 1, max = 1000, value = 500)
+       ),
+       mainPanel(
+         plotOutput("distPlot")
+       )
+     )
+   )
+   
+   server <- function(input, output) {
+     output$distPlot <- renderPlot({
+       hist(rnorm(input$obs))
+     })
+   }
+   
+   shinyApp(ui = ui, server = server)',
+  file.path(app_dir, "app.R")
+)
+
+# Export the app
+shinydocker::export(app_dir, run = TRUE, detached = TRUE)
+
+## Alternatively, steps can be run separately ----
+
+# Create Docker configuration
+dockerize(app_dir)
+
+# Build Docker image
+build_image(app_dir)
+
+# Run the containerized app
+run_container(app_dir, detach = TRUE)

inst/templates/Dockerfile_Python

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+FROM python:3.8-slim
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    gcc \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Shiny for Python
+RUN pip install shiny
+
+# Install additional Python dependencies
+{{DEPENDENCIES}}
+
+# Copy application files
+COPY . /app
+WORKDIR /app
+
+# Set environment variables
+{{ENV_VARS}}
+
+# Expose port
+EXPOSE {{PORT}}
+
+# Run the application
+CMD ["shiny", "run", "app.py", "--host", "0.0.0.0", "--port", "{{PORT}}"]
+

inst/templates/Dockerfile_R

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+FROM rocker/shiny:latest
+
+# Install system dependencies for devtools
+RUN apt-get update && apt-get install -y \
+    libcurl4-openssl-dev \
+    libssl-dev \
+    libxml2-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install R packages
+{{DEPENDENCIES}}
+
+# Copy application files
+COPY . /srv/shiny-server/app/
+WORKDIR /srv/shiny-server/app
+
+# Set environment variables
+{{ENV_VARS}}
+
+# Expose port
+EXPOSE {{PORT}}
+
+# Run the application
+CMD ["/usr/bin/shiny-server"]
+

inst/templates/dockerignore

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+
+# R specific
+.RData
+.Rhistory
+.Rproj.user/
+*.Rproj
+renv/library/
+packrat/lib*/
+packrat/src/
+
+# Python specific
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+venv/
+ENV/
+.env
+.venv
+
+# Common
+.git
+.gitignore
+.github/
+node_modules/
+Dockerfile
+docker-compose.yml
+.dockerignore
+.DS_Store
+*.log
+