Command line to generate R2Font

Sources/FontToolCore/FontToolHelper.swift

@@ -0,0 +1,48 @@
+//
+//  FontToolHelper.swift
+//  
+//
+//  Created by Thibaut Schmitt on 13/12/2021.
+//
+
+import Foundation
+import CLIToolCore
+
+class FontToolHelper {
+    static func getFontsData(fromInputFolder inputFolder: String) -> (fontsNames: [String], fontsFileNames: [String]) {
+        // Get a enumerator for all files
+        let fileManager = FileManager()
+        
+        guard fileManager.fileExists(atPath: inputFolder) else {
+            FontTool.exit(withError: FontToolError.fcScan(path, task.terminationStatus, task.output))
+        }
+        
+        let enumerator: FileManager.DirectoryEnumerator = fileManager.enumerator(atPath: inputFolder)!
+        
+        // Filters font files
+        let fontsFileNames: [String] = (enumerator.allObjects as! [String])
+            .filter {
+                if $0.hasSuffix(".ttf") || $0.hasSuffix(".otf") {
+                    return true
+                }
+                return false
+            }
+        
+        // Get font name (font name and font file name can be different)
+        let fontsNames = fontsFileNames.compactMap { getFontName(atPath: "\(inputFolder)/\($0)") }
+        
+        return (fontsNames: fontsNames, fontsFileNames: fontsFileNames)
+    }
+    
+    private static func getFontName(atPath path: String) -> String {
+        //print("fc-scan --format %{postscriptname} \(path)")
+        // Get real font name
+        let task = Shell.shell("fc-scan", "--format", "%{postscriptname}", path)
+        
+        guard let fontName = task.output, task.terminationStatus == 0 else {
+            FontTool.exit(withError: FontToolError.fcScan(path, task.terminationStatus, task.output))
+        }
+        
+        return fontName
+    }
+}