build: add nix-shell and cargo at the root of SDK (dfinity#41)

This adds CI, formatting and clippy (linting) to the whole project's rust code, so some fixes in the lib/ folder are necessary. The tests still passes, nix-shell and nix-build works (with build outputting the right expected format).
ethereumspace · Sep 24, 2019 · 28a0814 · 28a0814
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commit 28a0814
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diff --git a/.cargo/config b/.cargo/config
@@ -0,0 +1,6 @@
+[target.'cfg(target_os = "linux")']
+# "-C link-args..." is required to get the system API calls exported
+rustflags = ["-W", "rust-2018-idioms", "-C", "link-args=-Wl,--export-dynamic"]
+
+[build]
+rustflags = ["-W", "rust-2018-idioms"]
diff --git a/.gitignore b/.gitignore
@@ -4,6 +4,9 @@ result*
 build/
 target/
 
+# Nix-related directories.
+.cargo-home/
+
 # IDEs
 .idea/
 .vscode/
-Original file line number
+Diff line change
@@ Expand Up / @@ -4,6 +4,9 @@ result* @@
     build/
     target/
+    # Nix-related directories.
+    .cargo-home/
     # IDEs
     .idea/
     .vscode/
@@ Expand Down @@