From 66463236cc3b40649eecc87e1a51d4a225aa9061 Mon Sep 17 00:00:00 2001
From: josh <picon2227@gmail.com>
Date: Mon, 12 Jan 2026 11:28:31 -0600
Subject: [PATCH] first commit

---
 .gitignore      |  3 +++
 Makefile        | 31 +++++++++++++++++++++++++++++++
 README.md       | 35 +++++++++++++++++++++++++++++++++++
 include/env.hpp | 15 +++++++++++++++
 main.cpp        | 24 ++++++++++++++++++++++++
 src/env.cpp     | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 6 files changed, 156 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 README.md
 create mode 100644 include/env.hpp
 create mode 100644 main.cpp
 create mode 100644 src/env.cpp

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..355ad87
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+app
+libenv.a
+.env
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..3073564
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,31 @@
+TARGET = app
+CXX = g++ -std=c++23 -ggdb -Wall -Wextra -pedantic -O0
+INC = -I./include
+LIB_PATH =
+LIBS =
+HEADERS = include/env.hpp
+SOURCES = src/env.cpp \
+		  main.cpp
+STATIC = libenv.a
+
+all: $(TARGET)
+
+$(TARGET): $(HEADERS) $(SOURCES)
+	@$(CXX) $(INC) $(LIB_PATH) $(SOURCES) -o $(TARGET) $(LIBS)
+
+$(STATIC): include/env.hpp src/env.cpp
+	@g++ -std=c++23 -I./include -c src/env.cpp -o env.o
+	@ar rcs $(STATIC) env.o
+
+.PHONY: clean run
+
+clean:
+	@rm -rf $(TARGET)
+	@rm -rf $(STATIC)
+
+run: $(TARGET)
+	-@./$(TARGET)
+	@rm -rf $(TARGET)
+
+lib: $(STATIC)
+	@rm -rf env.o
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..2294354
--- /dev/null
+++ b/README.md
@@ -0,0 +1,35 @@
+# Env Reader
+
+This is a library to read .env files.
+
+## Usage
+- `make lib`
+
+```cpp
+
+#include <expected>
+#include <string>
+#include <print>
+
+#include "env.hpp"
+
+using std::unexpected;
+using std::expected;
+using std::println;
+using std::string;
+
+int main() {
+    Env env;
+    env.loadEnv("");
+    expected<string, string> result = env.get("FIRST");
+    if (!result.has_value()) {
+        println("{}", result.error());
+        return 1;
+    }
+
+    println("{}", result.value());
+
+    return 0;
+}
+
+```
diff --git a/include/env.hpp b/include/env.hpp
new file mode 100644
index 0000000..d07d2e9
--- /dev/null
+++ b/include/env.hpp
@@ -0,0 +1,15 @@
+#pragma once
+
+#include <expected>
+#include <string>
+#include <map>
+
+class Env {
+    public:
+        Env();
+        void loadEnv(const std::string& cwd);
+        std::expected<std::string, std::string> get(const std::string& key);
+
+    private:
+        std::map<std::string, std::string> map_;
+};
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..f9e9553
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,24 @@
+#include <expected>
+#include <string>
+#include <print>
+
+#include "env.hpp"
+
+using std::unexpected;
+using std::expected;
+using std::println;
+using std::string;
+
+int main() {
+    Env env;
+    env.loadEnv("");
+    expected<string, string> result = env.get("FIRST");
+    if (!result.has_value()) {
+        println("{}", result.error());
+        return 1;
+    }
+
+    println("{}", result.value());
+
+    return 0;
+}
diff --git a/src/env.cpp b/src/env.cpp
new file mode 100644
index 0000000..c47ac9f
--- /dev/null
+++ b/src/env.cpp
@@ -0,0 +1,48 @@
+#include <filesystem>
+#include <expected>
+#include <fstream>
+#include <string>
+#include <map>
+
+namespace fs = std::filesystem;
+
+using std::unexpected;
+using std::expected;
+using std::string;
+using std::map;
+
+#include "env.hpp"
+
+Env::Env() {
+}
+
+void Env::loadEnv(const string& cwd) {
+    string filename = ".env";
+    if (!cwd.empty()) {
+        filename = (fs::path(cwd) / ".env").string();
+    }
+
+    std::ifstream file(filename);
+    string line;
+    string::size_type pos;
+    while (std::getline(file, line)) {
+        pos = line.find_first_of("=");
+        string key = line.substr(0, pos);
+        string value = line.substr(pos + 1);
+        if (value.starts_with("'")) {
+            value = value.substr(1);
+        }
+        if (value.ends_with("'")) {
+            value.pop_back();
+        }
+        map_[key] = value;
+    }
+}
+
+expected<string, string> Env::get(const string& key) {
+    if (map_.contains(key)) {
+        return map_[key];
+    }
+
+    return unexpected("Key does not exist");
+}