Vendor dependencies

Let's see how I like this workflow.

vendor/anyhow/tests/ui/chained-comparison.rs

@@ -0,0 +1,8 @@
+use anyhow::{ensure, Result};
+
+fn main() -> Result<()> {
+    // `ensure!` must not partition this into `(false) == (false == true)`
+    // because Rust doesn't ordinarily allow this form of expression.
+    ensure!(false == false == true);
+    Ok(())
+}

vendor/anyhow/tests/ui/chained-comparison.stderr

@@ -0,0 +1,10 @@
+error: comparison operators cannot be chained
+ --> tests/ui/chained-comparison.rs:6:19
+  |
+6 |     ensure!(false == false == true);
+  |                   ^^       ^^
+  |
+help: split the comparison into two
+  |
+6 |     ensure!(false == false && false == true);
+  |                            ++++++++

vendor/anyhow/tests/ui/empty-ensure.rs

@@ -0,0 +1,6 @@
+use anyhow::{ensure, Result};
+
+fn main() -> Result<()> {
+    ensure!();
+    Ok(())
+}

vendor/anyhow/tests/ui/empty-ensure.stderr

@@ -0,0 +1,12 @@
+error: unexpected end of macro invocation
+ --> tests/ui/empty-ensure.rs:4:5
+  |
+4 |     ensure!();
+  |     ^^^^^^^^^ missing tokens in macro arguments
+  |
+note: while trying to match meta-variable `$cond:expr`
+ --> src/ensure.rs
+  |
+  |     ($cond:expr $(,)?) => {
+  |      ^^^^^^^^^^
+  = note: this error originates in the macro `$crate::__parse_ensure` which comes from the expansion of the macro `ensure` (in Nightly builds, run with -Z macro-backtrace for more info)

vendor/anyhow/tests/ui/must-use.rs

@@ -0,0 +1,11 @@
+#![deny(unused_must_use)]
+
+use anyhow::anyhow;
+
+fn main() -> anyhow::Result<()> {
+    if true {
+        // meant to write bail!
+        anyhow!("it failed");
+    }
+    Ok(())
+}

vendor/anyhow/tests/ui/must-use.stderr

@@ -0,0 +1,12 @@
+error: unused return value of `anyhow::__private::must_use` that must be used
+ --> tests/ui/must-use.rs:8:9
+  |
+8 |         anyhow!("it failed");
+  |         ^^^^^^^^^^^^^^^^^^^^
+  |
+note: the lint level is defined here
+ --> tests/ui/must-use.rs:1:9
+  |
+1 | #![deny(unused_must_use)]
+  |         ^^^^^^^^^^^^^^^
+  = note: this error originates in the macro `anyhow` (in Nightly builds, run with -Z macro-backtrace for more info)

vendor/anyhow/tests/ui/no-impl.rs

@@ -0,0 +1,8 @@
+use anyhow::anyhow;
+
+#[derive(Debug)]
+struct Error;
+
+fn main() {
+    let _ = anyhow!(Error);
+}

vendor/anyhow/tests/ui/no-impl.stderr

@@ -0,0 +1,31 @@
+error[E0599]: the method `anyhow_kind` exists for reference `&Error`, but its trait bounds were not satisfied
+ --> tests/ui/no-impl.rs:7:13
+  |
+4 | struct Error;
+  | ------------
+  | |
+  | doesn't satisfy `Error: Into<anyhow::Error>`
+  | doesn't satisfy `Error: anyhow::kind::TraitKind`
+  | doesn't satisfy `Error: std::fmt::Display`
+...
+7 |     let _ = anyhow!(Error);
+  |             ^^^^^^^^^^^^^^ method cannot be called on `&Error` due to unsatisfied trait bounds
+  |
+  = note: the following trait bounds were not satisfied:
+          `Error: Into<anyhow::Error>`
+          which is required by `Error: anyhow::kind::TraitKind`
+          `Error: std::fmt::Display`
+          which is required by `&Error: anyhow::kind::AdhocKind`
+          `&Error: Into<anyhow::Error>`
+          which is required by `&Error: anyhow::kind::TraitKind`
+note: the traits `Into` and `std::fmt::Display` must be implemented
+ --> $RUST/core/src/fmt/mod.rs
+  |
+  | pub trait Display {
+  | ^^^^^^^^^^^^^^^^^
+  |
+ ::: $RUST/core/src/convert/mod.rs
+  |
+  | pub trait Into<T>: Sized {
+  | ^^^^^^^^^^^^^^^^^^^^^^^^
+  = note: this error originates in the macro `anyhow` (in Nightly builds, run with -Z macro-backtrace for more info)

vendor/anyhow/tests/ui/temporary-value.rs

@@ -0,0 +1,5 @@
+use anyhow::anyhow;
+
+fn main() {
+    let _ = anyhow!(&String::new());
+}

vendor/anyhow/tests/ui/temporary-value.stderr

@@ -0,0 +1,9 @@
+error[E0716]: temporary value dropped while borrowed
+ --> tests/ui/temporary-value.rs:4:22
+  |
+4 |     let _ = anyhow!(&String::new());
+  |             ---------^^^^^^^^^^^^^-
+  |             |        |
+  |             |        creates a temporary value which is freed while still in use
+  |             temporary value is freed at the end of this statement
+  |             argument requires that borrow lasts for `'static`

vendor/anyhow/tests/ui/wrong-interpolation.rs

@@ -0,0 +1,5 @@
+use anyhow::{bail, Result};
+
+fn main() -> Result<()> {
+    bail!("{} not found");
+}

vendor/anyhow/tests/ui/wrong-interpolation.stderr

@@ -0,0 +1,5 @@
+error: 1 positional argument in format string, but no arguments were given
+ --> tests/ui/wrong-interpolation.rs:4:12
+  |
+4 |     bail!("{} not found");
+  |            ^^