1 files changed, 172 insertions, 0 deletions
diff --git a/util/flashrom_tester/src/logger.rs b/util/flashrom_tester/src/logger.rs
new file mode 100644
index 00000000..e1c00f5d
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+++ b/util/flashrom_tester/src/logger.rs
@@ -0,0 +1,172 @@
+//
+// Copyright 2019, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Alternatively, this software may be distributed under the terms of the
+// GNU General Public License ("GPL") version 2 as published by the Free
+// Software Foundation.
+//
+
+use flashrom_tester::types;
+use std::io::Write;
+use std::path::PathBuf;
+use std::sync::Mutex;
+
+struct Logger<W: Write + Send> {
+    level: log::LevelFilter,
+    target: LogTarget<W>,
+}
+
+enum LogTarget<W>
+where
+    W: Write,
+{
+    Terminal,
+    Write(Mutex<W>),
+}
+
+impl<W: Write + Send> log::Log for Logger<W> {
+    fn enabled(&self, metadata: &log::Metadata) -> bool {
+        metadata.level() <= self.level
+    }
+
+    fn log(&self, record: &log::Record) {
+        fn log_internal<W: Write>(mut w: W, record: &log::Record) -> std::io::Result<()> {
+            let now = chrono::Local::now();
+            write!(w, "{}{} ", types::MAGENTA, now.format("%Y-%m-%dT%H:%M:%S"))?;
+            write!(
+                w,
+                "{}[ {} ]{} ",
+                types::YELLOW,
+                record.level(),
+                types::RESET
+            )?;
+            writeln!(w, "{}", record.args())
+        }
+
+        // Write errors deliberately ignored
+        let _ = match self.target {
+            LogTarget::Terminal => {
+                let stdout = std::io::stdout();
+                let mut lock = stdout.lock();
+                log_internal(&mut lock, record)
+            }
+            LogTarget::Write(ref mutex) => {
+                let mut lock = mutex.lock().unwrap();
+                log_internal(&mut *lock, record)
+            }
+        };
+    }
+
+    fn flush(&self) {
+        // Flush errors deliberately ignored
+        let _ = match self.target {
+            LogTarget::Terminal => std::io::stdout().flush(),
+            LogTarget::Write(ref w) => w.lock().unwrap().flush(),
+        };
+    }
+}
+
+pub fn init(to_file: Option<PathBuf>, debug: bool) {
+    let mut logger = Logger {
+        level: log::LevelFilter::Info,
+        target: LogTarget::Terminal,
+    };
+
+    if debug {
+        logger.level = log::LevelFilter::Debug;
+    }
+    if let Some(path) = to_file {
+        logger.target = LogTarget::Write(Mutex::new(
+            std::fs::File::create(path).expect("Unable to open log file for writing"),
+        ));
+    }
+
+    log::set_max_level(logger.level);
+    log::set_boxed_logger(Box::new(logger)).unwrap();
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{LogTarget, Logger};
+    use log::{Level, LevelFilter, Log, Record};
+    use std::sync::Mutex;
+
+    fn run_records(records: &[Record]) -> String {
+        let mut buf = Vec::<u8>::new();
+        {
+            let lock = Mutex::new(&mut buf);
+            let logger = Logger {
+                level: LevelFilter::Info,
+                target: LogTarget::Write(lock),
+            };
+
+            for record in records {
+                if logger.enabled(record.metadata()) {
+                    logger.log(&record);
+                }
+            }
+        }
+        String::from_utf8(buf).unwrap()
+    }
+
+    /// Log messages have the expected format
+    #[test]
+    fn format() {
+        let buf = run_records(&[Record::builder()
+            .args(format_args!("Test message at INFO"))
+            .level(Level::Info)
+            .build()]);
+
+        assert_eq!(&buf[..5], "\x1b[35m");
+        // Time is difficult to test, assume it's formatted okay
+        assert_eq!(
+            &buf[24..],
+            " \x1b[33m[ INFO ]\x1b[0m Test message at INFO\n"
+        );
+    }
+
+    #[test]
+    fn level_filter() {
+        let buf = run_records(&[
+            Record::builder()
+                .args(format_args!("Test message at DEBUG"))
+                .level(Level::Debug)
+                .build(),
+            Record::builder()
+                .args(format_args!("Hello, world!"))
+                .level(Level::Error)
+                .build(),
+        ]);
+
+        // There is one line because the Debug record wasn't written.
+        println!("{}", buf);
+        assert_eq!(buf.lines().count(), 1);
+    }
+}