Allow the -i <FILENAME> argument to be specified multiple times

src/SeqCli/Cli/Commands/IngestCommand.cs

@@ -47,7 +47,7 @@ class IngestCommand : Command
     public IngestCommand(SeqConnectionFactory connectionFactory)
     {
         _connectionFactory = connectionFactory;
-        _fileInputFeature = Enable(new FileInputFeature("File(s) to ingest", supportsWildcard: true));
+        _fileInputFeature = Enable(new FileInputFeature("File(s) to ingest", allowMultiple: true));
         _invalidDataHandlingFeature = Enable<InvalidDataHandlingFeature>();
         _properties = Enable<PropertiesFeature>();
 

src/SeqCli/Cli/Commands/PrintCommand.cs

@@ -44,7 +44,7 @@ public PrintCommand(SeqCliOutputConfig outputConfig)
         _noColor = outputConfig.DisableColor;
         _forceColor = outputConfig.ForceColor;
 
-        _fileInputFeature = Enable(new FileInputFeature("CLEF file to read", supportsWildcard: true));
+        _fileInputFeature = Enable(new FileInputFeature("CLEF file to read", allowMultiple: true));
 
         Options.Add("f=|filter=",
             "Filter expression to select a subset of events",

src/SeqCli/Cli/Commands/Signal/ImportCommand.cs

@@ -59,7 +59,7 @@ protected override async Task<int> Run()
     {
         var connection = _connectionFactory.Connect(_connection);
 
-        using var input = _fileInputFeature.OpenInput();
+        using var input = _fileInputFeature.OpenSingleInput();
         var line = await input.ReadLineAsync();
         while (line != null)
         {

src/SeqCli/Cli/Features/FileInputFeature.cs

@@ -15,29 +15,35 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using SeqCli.Util;
 
 namespace SeqCli.Cli.Features;
 
 class FileInputFeature : CommandFeature
 {
     readonly string _description;
-    readonly bool _supportsWildcard;
+    readonly bool _allowMultiple;
+    readonly List<string> _inputFilenames = new();
 
-    public FileInputFeature(string description, bool supportsWildcard = false)
+    public FileInputFeature(string description, bool allowMultiple = false)
     {
         _description = description;
-        _supportsWildcard = supportsWildcard;
+        _allowMultiple = allowMultiple;
     }
 
-    string? InputFilename { get; set; }
-
     public override void Enable(OptionSet options)
     {
-        var wildcardHelp = _supportsWildcard ? $", including the `{DirectoryExt.Wildcard}` wildcard" : "";
+        var wildcardHelp = _allowMultiple ? $", including the `{DirectoryExt.Wildcard}` wildcard" : "";
         options.Add("i=|input=",
             $"{_description}{wildcardHelp}; if not specified, `STDIN` will be used",
-            v => InputFilename = string.IsNullOrWhiteSpace(v) ? null : v.Trim());
+            v =>
+            {
+                if (!string.IsNullOrWhiteSpace(v))
+                {
+                    _inputFilenames.Add(v.Trim());
+                }
+            });
     }
 
     static TextReader OpenText(string filename)
@@ -46,21 +52,29 @@ static TextReader OpenText(string filename)
             File.Open(filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite));
     }
 
-    public TextReader OpenInput()
+    public TextReader OpenSingleInput()
     {
-        return InputFilename != null ? OpenText(InputFilename) : Console.In;
+        return _inputFilenames.SingleOrDefault() is {} filename ? OpenText(filename) : Console.In;
     }
 
     public IEnumerable<TextReader> OpenInputs()
     {
-        if (InputFilename == null || !DirectoryExt.IncludesWildcard(InputFilename))
+        if (_inputFilenames.Count == 0)
         {
-            yield return OpenInput();
+            yield return OpenSingleInput();
         }
-        else
+
+        foreach (var filename in _inputFilenames)
         {
-            foreach (var path in DirectoryExt.GetFiles(InputFilename))
-                yield return OpenText(path);
+            if (!DirectoryExt.IncludesWildcard(filename))
+            {
+                yield return OpenText(filename);
+            }
+            else
+            {
+                foreach (var path in DirectoryExt.GetFiles(filename))
+                    yield return OpenText(path);
+            }
         }
     }
 }