1 files changed, 355 insertions, 0 deletions
diff --git a/vendor/indicatif/src/iter.rs b/vendor/indicatif/src/iter.rs
new file mode 100644
index 0000000..3e73660
--- /dev/null
+++ b/vendor/indicatif/src/iter.rs
@@ -0,0 +1,355 @@
+use std::borrow::Cow;
+use std::io::{self, IoSliceMut};
+use std::iter::FusedIterator;
+#[cfg(feature = "tokio")]
+use std::pin::Pin;
+#[cfg(feature = "tokio")]
+use std::task::{Context, Poll};
+use std::time::Duration;
+
+#[cfg(feature = "tokio")]
+use tokio::io::{ReadBuf, SeekFrom};
+
+use crate::progress_bar::ProgressBar;
+use crate::state::ProgressFinish;
+use crate::style::ProgressStyle;
+
+/// Wraps an iterator to display its progress.
+pub trait ProgressIterator
+where
+    Self: Sized + Iterator,
+{
+    /// Wrap an iterator with default styling. Uses `Iterator::size_hint` to get length.
+    /// Returns `Some(..)` only if `size_hint.1` is `Some`. If you want to create a progress bar
+    /// even if `size_hint.1` returns `None` use `progress_count` or `progress_with` instead.
+    fn try_progress(self) -> Option<ProgressBarIter<Self>> {
+        self.size_hint()
+            .1
+            .map(|len| self.progress_count(u64::try_from(len).unwrap()))
+    }
+
+    /// Wrap an iterator with default styling.
+    fn progress(self) -> ProgressBarIter<Self>
+    where
+        Self: ExactSizeIterator,
+    {
+        let len = u64::try_from(self.len()).unwrap();
+        self.progress_count(len)
+    }
+
+    /// Wrap an iterator with an explicit element count.
+    fn progress_count(self, len: u64) -> ProgressBarIter<Self> {
+        self.progress_with(ProgressBar::new(len))
+    }
+
+    /// Wrap an iterator with a custom progress bar.
+    fn progress_with(self, progress: ProgressBar) -> ProgressBarIter<Self>;
+
+    /// Wrap an iterator with a progress bar and style it.
+    fn progress_with_style(self, style: crate::ProgressStyle) -> ProgressBarIter<Self>
+    where
+        Self: ExactSizeIterator,
+    {
+        let len = u64::try_from(self.len()).unwrap();
+        let bar = ProgressBar::new(len).with_style(style);
+        self.progress_with(bar)
+    }
+}
+
+/// Wraps an iterator to display its progress.
+#[derive(Debug)]
+pub struct ProgressBarIter<T> {
+    pub(crate) it: T,
+    pub progress: ProgressBar,
+}
+
+impl<T> ProgressBarIter<T> {
+    /// Builder-like function for setting underlying progress bar's style.
+    ///
+    /// See [ProgressBar::with_style].
+    pub fn with_style(mut self, style: ProgressStyle) -> Self {
+        self.progress = self.progress.with_style(style);
+        self
+    }
+
+    /// Builder-like function for setting underlying progress bar's prefix.
+    ///
+    /// See [ProgressBar::with_prefix].
+    pub fn with_prefix(mut self, prefix: impl Into<Cow<'static, str>>) -> Self {
+        self.progress = self.progress.with_prefix(prefix);
+        self
+    }
+
+    /// Builder-like function for setting underlying progress bar's message.
+    ///
+    /// See [ProgressBar::with_message].
+    pub fn with_message(mut self, message: impl Into<Cow<'static, str>>) -> Self {
+        self.progress = self.progress.with_message(message);
+        self
+    }
+
+    /// Builder-like function for setting underlying progress bar's position.
+    ///
+    /// See [ProgressBar::with_position].
+    pub fn with_position(mut self, position: u64) -> Self {
+        self.progress = self.progress.with_position(position);
+        self
+    }
+
+    /// Builder-like function for setting underlying progress bar's elapsed time.
+    ///
+    /// See [ProgressBar::with_elapsed].
+    pub fn with_elapsed(mut self, elapsed: Duration) -> Self {
+        self.progress = self.progress.with_elapsed(elapsed);
+        self
+    }
+
+    /// Builder-like function for setting underlying progress bar's finish behavior.
+    ///
+    /// See [ProgressBar::with_finish].
+    pub fn with_finish(mut self, finish: ProgressFinish) -> Self {
+        self.progress = self.progress.with_finish(finish);
+        self
+    }
+}
+
+impl<S, T: Iterator<Item = S>> Iterator for ProgressBarIter<T> {
+    type Item = S;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let item = self.it.next();
+
+        if item.is_some() {
+            self.progress.inc(1);
+        } else if !self.progress.is_finished() {
+            self.progress.finish_using_style();
+        }
+
+        item
+    }
+}
+
+impl<T: ExactSizeIterator> ExactSizeIterator for ProgressBarIter<T> {
+    fn len(&self) -> usize {
+        self.it.len()
+    }
+}
+
+impl<T: DoubleEndedIterator> DoubleEndedIterator for ProgressBarIter<T> {
+    fn next_back(&mut self) -> Option<Self::Item> {
+        let item = self.it.next_back();
+
+        if item.is_some() {
+            self.progress.inc(1);
+        } else if !self.progress.is_finished() {
+            self.progress.finish_using_style();
+        }
+
+        item
+    }
+}
+
+impl<T: FusedIterator> FusedIterator for ProgressBarIter<T> {}
+
+impl<R: io::Read> io::Read for ProgressBarIter<R> {
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        let inc = self.it.read(buf)?;
+        self.progress.inc(inc as u64);
+        Ok(inc)
+    }
+
+    fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> io::Result<usize> {
+        let inc = self.it.read_vectored(bufs)?;
+        self.progress.inc(inc as u64);
+        Ok(inc)
+    }
+
+    fn read_to_string(&mut self, buf: &mut String) -> io::Result<usize> {
+        let inc = self.it.read_to_string(buf)?;
+        self.progress.inc(inc as u64);
+        Ok(inc)
+    }
+
+    fn read_exact(&mut self, buf: &mut [u8]) -> io::Result<()> {
+        self.it.read_exact(buf)?;
+        self.progress.inc(buf.len() as u64);
+        Ok(())
+    }
+}
+
+impl<R: io::BufRead> io::BufRead for ProgressBarIter<R> {
+    fn fill_buf(&mut self) -> io::Result<&[u8]> {
+        self.it.fill_buf()
+    }
+
+    fn consume(&mut self, amt: usize) {
+        self.it.consume(amt);
+        self.progress.inc(amt as u64);
+    }
+}
+
+impl<S: io::Seek> io::Seek for ProgressBarIter<S> {
+    fn seek(&mut self, f: io::SeekFrom) -> io::Result<u64> {
+        self.it.seek(f).map(|pos| {
+            self.progress.set_position(pos);
+            pos
+        })
+    }
+    // Pass this through to preserve optimizations that the inner I/O object may use here
+    // Also avoid sending a set_position update when the position hasn't changed
+    fn stream_position(&mut self) -> io::Result<u64> {
+        self.it.stream_position()
+    }
+}
+
+#[cfg(feature = "tokio")]
+#[cfg_attr(docsrs, doc(cfg(feature = "tokio")))]
+impl<W: tokio::io::AsyncWrite + Unpin> tokio::io::AsyncWrite for ProgressBarIter<W> {
+    fn poll_write(
+        mut self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+        buf: &[u8],
+    ) -> Poll<io::Result<usize>> {
+        Pin::new(&mut self.it).poll_write(cx, buf).map(|poll| {
+            poll.map(|inc| {
+                self.progress.inc(inc as u64);
+                inc
+            })
+        })
+    }
+
+    fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
+        Pin::new(&mut self.it).poll_flush(cx)
+    }
+
+    fn poll_shutdown(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
+        Pin::new(&mut self.it).poll_shutdown(cx)
+    }
+}
+
+#[cfg(feature = "tokio")]
+#[cfg_attr(docsrs, doc(cfg(feature = "tokio")))]
+impl<W: tokio::io::AsyncRead + Unpin> tokio::io::AsyncRead for ProgressBarIter<W> {
+    fn poll_read(
+        mut self: Pin<&mut Self>,
+        cx: &mut Context<'_>,
+        buf: &mut ReadBuf<'_>,
+    ) -> Poll<io::Result<()>> {
+        let prev_len = buf.filled().len() as u64;
+        if let Poll::Ready(e) = Pin::new(&mut self.it).poll_read(cx, buf) {
+            self.progress.inc(buf.filled().len() as u64 - prev_len);
+            Poll::Ready(e)
+        } else {
+            Poll::Pending
+        }
+    }
+}
+
+#[cfg(feature = "tokio")]
+#[cfg_attr(docsrs, doc(cfg(feature = "tokio")))]
+impl<W: tokio::io::AsyncSeek + Unpin> tokio::io::AsyncSeek for ProgressBarIter<W> {
+    fn start_seek(mut self: Pin<&mut Self>, position: SeekFrom) -> io::Result<()> {
+        Pin::new(&mut self.it).start_seek(position)
+    }
+
+    fn poll_complete(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<u64>> {
+        Pin::new(&mut self.it).poll_complete(cx)
+    }
+}
+
+#[cfg(feature = "tokio")]
+#[cfg_attr(docsrs, doc(cfg(feature = "tokio")))]
+impl<W: tokio::io::AsyncBufRead + Unpin + tokio::io::AsyncRead> tokio::io::AsyncBufRead
+    for ProgressBarIter<W>
+{
+    fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<&[u8]>> {
+        let this = self.get_mut();
+        let result = Pin::new(&mut this.it).poll_fill_buf(cx);
+        if let Poll::Ready(Ok(buf)) = &result {
+            this.progress.inc(buf.len() as u64);
+        }
+        result
+    }
+
+    fn consume(mut self: Pin<&mut Self>, amt: usize) {
+        Pin::new(&mut self.it).consume(amt);
+    }
+}
+
+#[cfg(feature = "futures")]
+#[cfg_attr(docsrs, doc(cfg(feature = "futures")))]
+impl<S: futures_core::Stream + Unpin> futures_core::Stream for ProgressBarIter<S> {
+    type Item = S::Item;
+
+    fn poll_next(
+        self: std::pin::Pin<&mut Self>,
+        cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<Option<Self::Item>> {
+        let this = self.get_mut();
+        let item = std::pin::Pin::new(&mut this.it).poll_next(cx);
+        match &item {
+            std::task::Poll::Ready(Some(_)) => this.progress.inc(1),
+            std::task::Poll::Ready(None) => this.progress.finish_using_style(),
+            std::task::Poll::Pending => {}
+        }
+        item
+    }
+}
+
+impl<W: io::Write> io::Write for ProgressBarIter<W> {
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        self.it.write(buf).map(|inc| {
+            self.progress.inc(inc as u64);
+            inc
+        })
+    }
+
+    fn write_vectored(&mut self, bufs: &[io::IoSlice]) -> io::Result<usize> {
+        self.it.write_vectored(bufs).map(|inc| {
+            self.progress.inc(inc as u64);
+            inc
+        })
+    }
+
+    fn flush(&mut self) -> io::Result<()> {
+        self.it.flush()
+    }
+
+    // write_fmt can not be captured with reasonable effort.
+    // as it uses write_all internally by default that should not be a problem.
+    // fn write_fmt(&mut self, fmt: fmt::Arguments) -> io::Result<()>;
+}
+
+impl<S, T: Iterator<Item = S>> ProgressIterator for T {
+    fn progress_with(self, progress: ProgressBar) -> ProgressBarIter<Self> {
+        ProgressBarIter { it: self, progress }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use crate::iter::{ProgressBarIter, ProgressIterator};
+    use crate::progress_bar::ProgressBar;
+    use crate::ProgressStyle;
+
+    #[test]
+    fn it_can_wrap_an_iterator() {
+        let v = [1, 2, 3];
+        let wrap = |it: ProgressBarIter<_>| {
+            assert_eq!(it.map(|x| x * 2).collect::<Vec<_>>(), vec![2, 4, 6]);
+        };
+
+        wrap(v.iter().progress());
+        wrap(v.iter().progress_count(3));
+        wrap({
+            let pb = ProgressBar::new(v.len() as u64);
+            v.iter().progress_with(pb)
+        });
+        wrap({
+            let style = ProgressStyle::default_bar()
+                .template("{wide_bar:.red} {percent}/100%")
+                .unwrap();
+            v.iter().progress_with_style(style)
+        });
+    }
+}