From e4548a8cf46b20b8e89ab75ee9201e3b244484ba Mon Sep 17 00:00:00 2001
From: Alexander Karatarakis <alkarata@microsoft.com>
Date: Thu, 15 Dec 2016 18:19:22 -0800
Subject: Add Files::read_all_lines() and Files::write_all_lines()

---
 toolsrc/include/vcpkg_Files.h |  4 ++++
 toolsrc/src/vcpkg_Files.cpp   | 29 +++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+)

diff --git a/toolsrc/include/vcpkg_Files.h b/toolsrc/include/vcpkg_Files.h
index 8b320303d..5e788f7be 100644
--- a/toolsrc/include/vcpkg_Files.h
+++ b/toolsrc/include/vcpkg_Files.h
@@ -14,6 +14,10 @@ namespace vcpkg {namespace Files
 
     expected<std::string> get_contents(const fs::path& file_path) noexcept;
 
+    expected<std::vector<std::string>> read_all_lines(const fs::path& file_path);
+
+    void write_all_lines(const fs::path& file_path, const std::vector<std::string>& lines);
+
     fs::path find_file_recursively_up(const fs::path& starting_dir, const std::string& filename);
 
     template <class Pred>
diff --git a/toolsrc/src/vcpkg_Files.cpp b/toolsrc/src/vcpkg_Files.cpp
index 698579736..889ceb055 100644
--- a/toolsrc/src/vcpkg_Files.cpp
+++ b/toolsrc/src/vcpkg_Files.cpp
@@ -42,6 +42,35 @@ namespace vcpkg {namespace Files
         return std::move(output);
     }
 
+    expected<std::vector<std::string>> read_all_lines(const fs::path& file_path)
+    {
+        std::fstream file_stream(file_path, std::ios_base::in | std::ios_base::binary);
+        if (file_stream.fail())
+        {
+            return std::errc::no_such_file_or_directory;
+        }
+
+        std::vector<std::string> output;
+        std::string line;
+        while (std::getline(file_stream, line))
+        {
+            output.push_back(line);
+        }
+        file_stream.close();
+
+        return std::move(output);
+    }
+
+    void write_all_lines(const fs::path& file_path, const std::vector<std::string>& lines)
+    {
+        std::fstream output(file_path, std::ios_base::out | std::ios_base::binary | std::ios_base::trunc);
+        for (const std::string& line : lines)
+        {
+            output << line << "\n";
+        }
+        output.close();
+    }
+
     fs::path find_file_recursively_up(const fs::path& starting_dir, const std::string& filename)
     {
         fs::path current_dir = starting_dir;
-- 
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