chore: add src

Cargo.toml

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+[package]
+name = "lib_tests"
+version = "0.1.0"
+authors = ["JesusPerez <jpl@jesusperez.pro>"]
+edition = "2018"
+
+[dependencies]
+anyhow = "1.0.40"
+envmnt = "0.9.0"
+serde = { version = "1.0", features = ["derive"] }
+serde_derive = "1.0.125"
+serde_json = "1.0.64"
+serde_yaml = "0.8.17"
+toml = "0.5.8"
+
+[dev-dependencies]
+#pretty_assertions = "0.6.1"
+# test-case = "1.1.0"

TODO.md

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+### Test library
+
+- [ ] Implement more tests
+
+- [ ] Use [Test Case](https://github.com/frondeus/test-case)

src/lib.rs

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+use dsc::{
+  utils::load_fs_content,
+};
+
+use anyhow::{Result};
+
+pub fn load_fs_data_content() -> Result<String> {
+  let data_path = &envmnt::get_or("DATA_PATH", ".");
+  let data_target = &envmnt::get_or("DATA_TARGET", "data");
+  let data_frmt = &envmnt::get_or("DATA_FORMAT", "yaml");
+  println!("Data path: {} in {} format.", &data_path, &data_frmt);
+  Ok(load_fs_content(&data_path, &data_target, &data_frmt))
+}