deps: drop tempfile

We were only using it to create temporary directories for `ignore`
tests, but it pulls in a bunch of dependencies and we don't really need
randomness. So just use our own simple wrapper instead.

5 files changed, 67 insertions, 108 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 9403aa3b..0572086d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -51,15 +51,6 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "c2-chacha"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "ppv-lite86 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
 name = "cc"
 version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -125,15 +116,6 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "getrandom"
-version = "0.1.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
 name = "glob"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -248,7 +230,6 @@ dependencies = [
  "memchr 2.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "same-file 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "walkdir 2.2.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi-util 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -353,11 +334,6 @@ version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "ppv-lite86"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
 name = "proc-macro2"
 version = "0.4.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -374,48 +350,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "rand"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "getrandom 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_chacha 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "rand_chacha"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "c2-chacha 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "rand_core"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "getrandom 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "rand_hc"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "redox_syscall"
-version = "0.1.56"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
 name = "regex"
 version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -440,14 +374,6 @@ version = "0.6.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "remove_dir_all"
-version = "0.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
 name = "ripgrep"
 version = "11.0.2"
 dependencies = [
@@ -520,19 +446,6 @@ dependencies = [
 ]
 
 [[package]]
-name = "tempfile"
-version = "3.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
- "remove_dir_all 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
 name = "termcolor"
 version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -620,7 +533,6 @@ dependencies = [
 "checksum bstr 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "e0a692f1c740e7e821ca71a22cf99b9b2322dfa94d10f71443befb1797b3946a"
 "checksum bytecount 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "be0fdd54b507df8f22012890aadd099979befdba27713c767993f8380112ca7c"
 "checksum byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "a7c3dd8985a7111efc5c80b44e23ecdd8c007de8ade3b96595387e812b957cf5"
-"checksum c2-chacha 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7d64d04786e0f528460fc884753cf8dddcc466be308f6026f8e355c41a0e4101"
 "checksum cc 1.0.38 (registry+https://github.com/rust-lang/crates.io-index)" = "ce400c638d48ee0e9ab75aef7997609ec57367ccfe1463f21bf53c3eca67bf46"
 "checksum cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "b486ce3ccf7ffd79fdeb678eac06a9e6c09fc88d33836340becb8fffe87c5e33"
 "checksum clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5067f5bb2d80ef5d68b4c87db81601f0b75bca627bc2ef76b141d7b846a3c6d9"
@@ -630,7 +542,6 @@ dependencies = [
 "checksum encoding_rs_io 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "9619ee7a2bf4e777e020b95c1439abaf008f8ea8041b78a0552c4f1bcf4df32c"
 "checksum fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "2fad85553e09a6f881f739c29f0b00b0f01357c743266d478b68951ce23285f3"
 "checksum fs_extra 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5f2a4a2034423744d2cc7ca2068453168dcdb82c438419e639a26bd87839c674"
-"checksum getrandom 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "34f33de6f0ae7c9cb5e574502a562e2b512799e32abb801cd1e79ad952b62b49"
 "checksum glob 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9b919933a397b79c37e33b77bb2aa3dc8eb6e165ad809e58ff75bc7db2e34574"
 "checksum itoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "501266b7edd0174f8530248f87f99c88fbe60ca4ef3dd486835b8d8d53136f7f"
 "checksum jemalloc-sys 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "0d3b9f3f5c9b31aa0f5ed3260385ac205db665baa41d49bb8338008ae94ede45"
@@ -645,18 +556,11 @@ dependencies = [
 "checksum pcre2 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "603da5e101220b9b306bf28e4f1f8703458ce2f64d2787b374e1a19494317180"
 "checksum pcre2-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "876c72d05059d23a84bd9fcdc3b1d31c50ea7fe00fe1522b4e68cd3608db8d5b"
 "checksum pkg-config 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)" = "a7c1d2cfa5a714db3b5f24f0915e74fcdf91d09d496ba61329705dda7774d2af"
-"checksum ppv-lite86 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "e3cbf9f658cdb5000fcf6f362b8ea2ba154b9f146a61c7a20d647034c6b6561b"
 "checksum proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)" = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
 "checksum quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)" = "6ce23b6b870e8f94f81fb0a363d65d86675884b34a09043c81e5562f11c1f8e1"
-"checksum rand 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d47eab0e83d9693d40f825f86948aa16eff6750ead4bdffc4ab95b8b3a7f052c"
-"checksum rand_chacha 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "03a2a90da8c7523f554344f921aa97283eadf6ac484a6d2a7d0212fa7f8d6853"
-"checksum rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "615e683324e75af5d43d8f7a39ffe3ee4a9dc42c5c701167a71dc59c3a493aca"
-"checksum rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
-"checksum redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)" = "2439c63f3f6139d1b57529d16bc3b8bb855230c8efcc5d3a896c8bea7c3b1e84"
 "checksum regex 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "88c3d9193984285d544df4a30c23a4e62ead42edf70a4452ceb76dac1ce05c26"
 "checksum regex-automata 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)" = "92b73c2a1770c255c240eaa4ee600df1704a38dc3feaa6e949e7fcd4f8dc09f9"
 "checksum regex-syntax 0.6.11 (registry+https://github.com/rust-lang/crates.io-index)" = "b143cceb2ca5e56d5671988ef8b15615733e7ee16cd348e064333b251b89343f"
-"checksum remove_dir_all 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "4a83fa3702a688b9359eccba92d153ac33fd2e8462f9e0e3fdf155239ea7792e"
 "checksum ryu 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c92464b447c0ee8c4fb3824ecc8383b81717b9f1e74ba2e72540aef7b9f82997"
 "checksum same-file 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "585e8ddcedc187886a30fa705c47985c3fa88d06624095856b36ca0b82ff4421"
 "checksum serde 1.0.98 (registry+https://github.com/rust-lang/crates.io-index)" = "7fe5626ac617da2f2d9c48af5515a21d5a480dbd151e01bb1c355e26a3e68113"
@@ -664,7 +568,6 @@ dependencies = [
 "checksum serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)" = "051c49229f282f7c6f3813f8286cc1e3323e8051823fce42c7ea80fe13521704"
 "checksum strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 "checksum syn 0.15.42 (registry+https://github.com/rust-lang/crates.io-index)" = "eadc09306ca51a40555dd6fc2b415538e9e18bc9f870e47b1a524a79fe2dcf5e"
-"checksum tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
 "checksum termcolor 1.0.5 (registry+https://github.com/rust-lang/crates.io-index)" = "96d6098003bde162e4277c70665bd87c326f5a0c3f3fbfb285787fa482d54e6e"
 "checksum textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
 "checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
diff --git a/ignore/Cargo.toml b/ignore/Cargo.toml
index 984d722b..7cf64416 100644
--- a/ignore/Cargo.toml
+++ b/ignore/Cargo.toml
@@ -31,8 +31,5 @@ walkdir = "2.2.7"
 [target.'cfg(windows)'.dependencies.winapi-util]
 version = "0.1.2"
 
-[dev-dependencies]
-tempfile = "3.0.5"
-
 [features]
 simd-accel = ["globset/simd-accel"]
diff --git a/ignore/src/dir.rs b/ignore/src/dir.rs
index 479e0c24..12201f22 100644
--- a/ignore/src/dir.rs
+++ b/ignore/src/dir.rs
@@ -721,10 +721,9 @@ mod tests {
     use std::io::Write;
     use std::path::Path;
 
-    use tempfile::{self, TempDir};
-
     use dir::IgnoreBuilder;
     use gitignore::Gitignore;
+    use tests::TempDir;
     use Error;
 
     fn wfile<P: AsRef<Path>>(path: P, contents: &str) {
@@ -744,7 +743,7 @@ mod tests {
     }
 
     fn tmpdir(prefix: &str) -> TempDir {
-        tempfile::Builder::new().prefix(prefix).tempdir().unwrap()
+        TempDir::new().unwrap()
     }
 
     #[test]
diff --git a/ignore/src/lib.rs b/ignore/src/lib.rs
index d0c8d2fc..61768abd 100644
--- a/ignore/src/lib.rs
+++ b/ignore/src/lib.rs
@@ -55,8 +55,6 @@ extern crate log;
 extern crate memchr;
 extern crate regex;
 extern crate same_file;
-#[cfg(test)]
-extern crate tempfile;
 extern crate thread_local;
 extern crate walkdir;
 #[cfg(windows)]
@@ -442,3 +440,66 @@ impl<T> Match<T> {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use std::env;
+    use std::error;
+    use std::fs;
+    use std::path::{Path, PathBuf};
+    use std::result;
+
+    /// A convenient result type alias.
+    pub type Result<T> =
+        result::Result<T, Box<dyn error::Error + Send + Sync>>;
+
+    macro_rules! err {
+        ($($tt:tt)*) => {
+            Box::<dyn error::Error + Send + Sync>::from(format!($($tt)*))
+        }
+    }
+
+    /// A simple wrapper for creating a temporary directory that is
+    /// automatically deleted when it's dropped.
+    ///
+    /// We use this in lieu of tempfile because tempfile brings in too many
+    /// dependencies.
+    #[derive(Debug)]
+    pub struct TempDir(PathBuf);
+
+    impl Drop for TempDir {
+        fn drop(&mut self) {
+            fs::remove_dir_all(&self.0).unwrap();
+        }
+    }
+
+    impl TempDir {
+        /// Create a new empty temporary directory under the system's configured
+        /// temporary directory.
+        pub fn new() -> Result<TempDir> {
+            use std::sync::atomic::{AtomicUsize, Ordering};
+
+            static TRIES: usize = 100;
+            static COUNTER: AtomicUsize = AtomicUsize::new(0);
+
+            let tmpdir = env::temp_dir();
+            for _ in 0..TRIES {
+                let count = COUNTER.fetch_add(1, Ordering::SeqCst);
+                let path = tmpdir.join("rust-ignore").join(count.to_string());
+                if path.is_dir() {
+                    continue;
+                }
+                fs::create_dir_all(&path).map_err(|e| {
+                    err!("failed to create {}: {}", path.display(), e)
+                })?;
+                return Ok(TempDir(path));
+            }
+            Err(err!("failed to create temp dir after {} tries", TRIES))
+        }
+
+        /// Return the underlying path to this temporary directory.
+        pub fn path(&self) -> &Path {
+            &self.0
+        }
+    }
+}
diff --git a/ignore/src/walk.rs b/ignore/src/walk.rs
index df796d41..b3e05f08 100644
--- a/ignore/src/walk.rs
+++ b/ignore/src/walk.rs
@@ -1730,8 +1730,7 @@ mod tests {
     use std::path::Path;
     use std::sync::{Arc, Mutex};
 
-    use tempfile::{self, TempDir};
-
+    use tests::TempDir;
     use super::{DirEntry, WalkBuilder, WalkState};
 
     fn wfile<P: AsRef<Path>>(path: P, contents: &str) {
@@ -1818,7 +1817,7 @@ mod tests {
     }
 
     fn tmpdir(prefix: &str) -> TempDir {
-        tempfile::Builder::new().prefix(prefix).tempdir().unwrap()
+        TempDir::new().unwrap()
     }
 
     fn assert_paths(