Ajoute la génération des smileys au format PNG depuis le SVG

Gulpfile.js

@@ -6,6 +6,7 @@ const { ESLint } = require('eslint')
 const gulp = require('gulp')
 const gulpif = require('gulp-if')
 const imagemin = require('gulp-imagemin')
+const run = require('gulp-run')
 const options = require('gulp-options')
 const path = require('path')
 const postcss = require('gulp-postcss')
@@ -171,6 +172,17 @@ function images() {
     .pipe(gulp.dest('dist/'))
 }
 
+// Generate PNG versions of SVG smileys.
+// Output files are not optimized for size.
+function convertSmileysToPng() {
+  const pathToScript = 'scripts/convert_smileys_to_svg.py'
+  const pathToSvgSmileys = 'assets/smileys/svg/'
+  const pathToPngSmileys = 'dist/smileys/png'
+  const convertToPng = run(`python ${pathToScript} ${pathToSvgSmileys} ${pathToPngSmileys}`)
+  convertToPng.exec()
+  return Promise.resolve('Smileys were converted') // to fit into gulp's asynchronous system
+}
+
 function spriteImages() {
   return gulp.src(['dist/images/sprite*.png'])
     .pipe(gulpif(!fast, imagemin())) // Minify the images
@@ -210,7 +222,24 @@ function watch() {
 }
 
 // Build the front
-const build = gulp.parallel(prepareZmd, prepareEasyMde, jsPackages, js, images, errors, gulp.series(spriteCss, gulp.parallel(css, spriteImages)))
+const build = gulp.series(
+  convertSmileysToPng, // automatically converted files may be overwritten with manually converted files afterwards
+  gulp.parallel(
+    prepareZmd,
+    prepareEasyMde,
+    jsPackages,
+    js,
+    images,
+    errors,
+    gulp.series(
+      spriteCss,
+      gulp.parallel(
+        css,
+        spriteImages
+      )
+    )
+  )
+)
 
 exports.build = build
 exports.watch = gulp.series(build, watch)

package.json

@@ -38,6 +38,7 @@
     "gulp-imagemin": "7.1.0",
     "gulp-options": "1.1.1",
     "gulp-postcss": "9.0.1",
+    "gulp-run": "1.7.1",
     "gulp-terser-js": "5.2.2",
     "gulp.spritesmith": "6.13.0",
     "jquery": "3.7.1",

requirements.txt

@@ -5,6 +5,7 @@ social-auth-app-django==5.3.0
 
 # Explicit dependencies (references in code)
 beautifulsoup4==4.12.2
+cairosvg==2.7.1
 django-crispy-forms==1.14.0
 django-model-utils==4.3.1
 django-munin==0.2.1

scripts/convert_smileys_to_svg.py

@@ -0,0 +1,46 @@
+import argparse
+import pathlib
+import os
+
+import cairosvg
+
+
+def convert_folder_to_svg(src_folder: pathlib.Path, dst_folder: pathlib.Path) -> int:
+    """
+    Convert all SVGs from src_folder into PNGs and write them in dst_folder.
+    Create dst_folder if needed.
+    Existing files in dst_fodler are overwritten.
+    Return the number of converted files.
+    """
+    src_files = src_folder.rglob("*.svg")
+    os.makedirs(dst_folder, exist_ok=True)
+    converted_file_count = 0
+    for src_file in src_files:
+        dst_file = dst_folder / f"{src_file.stem}.png"
+        cairosvg.svg2png(url=src_file.as_posix(), write_to=dst_file.as_posix())
+        converted_file_count += 1
+    return converted_file_count
+
+
+def get_cli_args():
+    """Get arguments from the CLI."""
+
+    # Build parser
+    parser = argparse.ArgumentParser(description="Convert a folder of SVG files to PNG")
+    parser.add_argument("source", help="Folder containing the SVG files to be converted")
+    parser.add_argument("destination", help="Folder in which the PNG files are written")
+
+    # Parse
+    raw_args = parser.parse_args()
+    processed_args = {
+        "source": pathlib.Path(raw_args.source),
+        "destination": pathlib.Path(raw_args.destination),
+    }
+
+    return processed_args
+
+
+if __name__ == "__main__":
+    args = get_cli_args()
+    file_count = convert_folder_to_svg(args["source"], args["destination"])
+    print(f"{__file__}: {file_count} files converted.")