From 43caeb901214d07fccea37b21962aa74e5dd7709 Mon Sep 17 00:00:00 2001
From: Alexander Bruy <alexander.bruy@gmail.com>
Date: Mon, 23 Oct 2023 11:51:26 +0300
Subject: [PATCH] add an option to read input data from a text file to tile
 command (#29)

* add an option to read input data from a text file to tile command

* use parseSimple() o instead of parse() as we don't need validation of
mandatory parameters

* update README
---
 README.md         |  6 ++++++
 src/tile/tile.cpp | 20 +++++++++++++++++++-
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 37a5f3d..f0776ad 100644
--- a/README.md
+++ b/README.md
@@ -127,6 +127,12 @@ Creates tiles from input data. For example to get tiles sized 100x100:
 pdal_wrench tile --length=100 --output=/data/tiles data1.las data2.las data3.las
 ```
 
+This tool can also read input data from a text file (one file per line)
+
+```
+pdal_wrench tile --length=100 --output=/data/tiles --input-file-list=my_list.txt
+```
+
 ## thin
 
 Creates a thinned version of the point cloud by only keeping every N-th point (`every-nth` mode) or keep points based on their distance (`sample` mode).
diff --git a/src/tile/tile.cpp b/src/tile/tile.cpp
index f4a3f70..cbd85ed 100644
--- a/src/tile/tile.cpp
+++ b/src/tile/tile.cpp
@@ -124,6 +124,7 @@ struct BaseInfo
         int max_threads;
         std::string outputFormat;   // las or laz (for now)
         bool buildVpc = false;
+        std::string inputFileList; // file list with input files
     } opts;
 
     pdal::BOX3D trueBounds;
@@ -434,6 +435,7 @@ void addArgs(pdal::ProgramArgs& programArgs, BaseInfo::Options& options, pdal::A
 {
     programArgs.add("output,o", "Output directory/filename", options.outputDir);
     programArgs.add("files,i", "Input files/directory", options.inputFiles).setPositional();
+    programArgs.add("input-file-list", "Read input files from a text file", options.inputFileList);
     programArgs.add("length,l", "Tile length", options.tileLength, 1000.);
     tempArg = &(programArgs.add("temp_dir", "Temp directory", options.tempDir));
     programArgs.add("output-format", "Output format (las/laz)", options.outputFormat);
@@ -461,7 +463,7 @@ bool handleOptions(pdal::StringList& arglist, BaseInfo::Options& options)
     addArgs(programArgs, options, tempArg, threadsArg);
     try
     {
-        programArgs.parse(arglist);
+        programArgs.parseSimple(arglist);
     }
     catch (const pdal::arg_error& err)
     {
@@ -498,6 +500,22 @@ bool handleOptions(pdal::StringList& arglist, BaseInfo::Options& options)
             throw FatalError("Unknown output format: " + options.outputFormat);
     }
 
+    if (!options.inputFileList.empty())
+    {
+        std::ifstream inputFile(options.inputFileList);
+        std::string line;
+        if(!inputFile)
+        {
+            throw FatalError("Failed to open input file list: " + options.inputFileList);
+        }
+
+        while (std::getline(inputFile, line))
+        {
+            options.inputFiles.push_back(line);
+        }
+    }
+
+
     return true;
 }