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https://github.com/rust-lang-nursery/rust-cookbook
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Added file names modified in the last 24 hours in CWD (#405)
* Update std badge version * Remove duplicate ex-format-datetime fixes #399
This commit is contained in:
Ludwig PACIFICI
Andrew Gauger
parent
24602267ea
commit
ecc4c2ea4b
3 changed files with 71 additions and 3 deletions
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@ -38,6 +38,7 @@
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| [Parse string into DateTime struct][ex-parse-datetime] | [![chrono-badge]][chrono] | [![cat-date-and-time-badge]][cat-date-and-time] |
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| [Perform checked date and time calculations][ex-datetime-arithmetic] | [![chrono-badge]][chrono] | [![cat-date-and-time-badge]][cat-date-and-time] |
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| [Examine the date and time][ex-examine-date-and-time] | [![chrono-badge]][chrono] | [![cat-date-and-time-badge]][cat-date-and-time] |
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| [File names that have been modified in the last 24 hours for the working directory][ex-file-24-hours-modified] | [![std-badge]][std] | [![cat-filesystem-badge]][cat-filesystem] [![cat-os-badge]][cat-os] |
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[ex-std-read-lines]: #ex-std-read-lines
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<a name="ex-std-read-lines"></a>
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@ -1705,6 +1706,64 @@ fn main() {
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}
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```
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[ex-file-24-hours-modified]: #ex-file-24-hours-modified
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<a name="ex-file-24-hours-modified"></a>
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## File names that have been modified in the last 24 hours for the working directory
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[![std-badge]][std] [![cat-filesystem-badge]][cat-filesystem]
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Gets the current working directory by calling [`env::current_dir`],
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then for each entries in [`fs::read_dir`], extracts the
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[`DirEntry::path`] and gets the metada via [`fs::Metadata`]. The
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[`Metadata::modified`] returns the [`SystemTime::elapsed`] time since
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last modification of the entry. It's converted into seconds with
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[`Duration::as_secs`] and compared with 24 hours (24 * 60 * 60
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seconds). [`Metadata::is_file`] is used to filter out directories.
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```rust
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# #[macro_use]
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# extern crate error_chain;
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#
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use std::{env, fs};
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# error_chain! {
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# foreign_links {
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# Io(std::io::Error);
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# SystemTimeError(std::time::SystemTimeError);
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# }
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# }
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#
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fn run() -> Result<()> {
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let current_dir = env::current_dir()?;
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println!(
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"Entries modified in the last 24 hours in {:?}:",
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current_dir
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);
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for entry in fs::read_dir(current_dir)? {
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let entry = entry?;
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let path = entry.path();
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let metadata = fs::metadata(&path)?;
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let last_modified = metadata.modified()?.elapsed()?.as_secs();
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if last_modified < 24 * 3600 && metadata.is_file() {
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println!(
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"Last modified: {:?} seconds, is read only: {:?}, size: {:?} bytes, filename: {:?}",
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last_modified,
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metadata.permissions().readonly(),
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metadata.len(),
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path.file_name().ok_or("No filename")?
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);
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}
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}
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Ok(())
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}
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#
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# quick_main!(run);
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```
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{{#include links.md}}
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<!-- API Reference -->
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@ -1733,7 +1792,10 @@ fn main() {
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[`DateTime`]: https://docs.rs/chrono/*/chrono/struct.DateTime.html
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[`digest::Context`]: https://docs.rs/ring/*/ring/digest/struct.Context.html
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[`digest::Digest`]: https://docs.rs/ring/*/ring/digest/struct.Digest.html
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[`DirEntry::path`]: https://doc.rust-lang.org/std/fs/struct.DirEntry.html#method.path
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[`Display`]: https://doc.rust-lang.org/std/fmt/trait.Display.html
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[`Duration::as_secs`]: https://doc.rust-lang.org/std/time/struct.Duration.html#method.as_secs
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[`env::current_dir`]: https://doc.rust-lang.org/std/env/fn.current_dir.html
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[`error_chain!`]: https://docs.rs/error-chain/*/error_chain/macro.error_chain.html
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[`Error`]: https://doc.rust-lang.org/std/error/trait.Error.html
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[`ErrorKind`]: https://docs.rs/error-chain/*/error_chain/example_generated/enum.ErrorKind.html
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@ -1742,11 +1804,15 @@ fn main() {
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[`File::try_clone`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.try_clone
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[`File`]: https://doc.rust-lang.org/std/fs/struct.File.html
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[`foreign_links`]: https://docs.rs/error-chain/*/error_chain/#foreign-links
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[`fs::Metadata`]: https://doc.rust-lang.org/std/fs/struct.Metadata.html
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[`fs::read_dir`]: https://doc.rust-lang.org/std/fs/fn.read_dir.html
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[`gen_ascii_chars`]: https://docs.rs/rand/*/rand/trait.Rng.html#method.gen_ascii_chars
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[`HashMap`]: https://doc.rust-lang.org/std/collections/struct.HashMap.html
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[`hmac::Signature`]: https://docs.rs/ring/*/ring/hmac/struct.Signature.html
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[`IndependentSample::ind_sample`]: https://doc.rust-lang.org/rand/rand/distributions/trait.IndependentSample.html#tymethod.ind_sample
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[`Lines`]: https://doc.rust-lang.org/std/io/struct.Lines.html
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[`Metadata::is_file`]: https://doc.rust-lang.org/std/fs/struct.Metadata.html#method.is_file
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[`Metadata::modified`]: https://doc.rust-lang.org/std/fs/struct.Metadata.html#method.modified
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[`Mmap::map`]: https://docs.rs/memmap/*/memmap/struct.Mmap.html#method.map
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[`Mutex`]: https://doc.rust-lang.org/std/sync/struct.Mutex.html
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[`MutexGuard`]: https://doc.rust-lang.org/std/sync/struct.MutexGuard.html
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@ -1784,6 +1850,7 @@ fn main() {
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[`seek`]: https://doc.rust-lang.org/std/fs/struct.File.html#method.seek
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[`std::io::Error`]: https://doc.rust-lang.org/std/io/struct.Error.html
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[`Stdio::piped`]: https://doc.rust-lang.org/std/process/struct.Stdio.html
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[`SystemTime::elapsed`]: https://doc.rust-lang.org/std/time/struct.SystemTime.html#method.elapsed
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[`time::Duration`]: https://doc.rust-lang.org/std/time/struct.Duration.html
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[`time::Instant::elapsed`]: https://doc.rust-lang.org/std/time/struct.Instant.html#method.elapsed
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[`time::Instant::now`]: https://doc.rust-lang.org/std/time/struct.Instant.html#method.now
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@ -56,6 +56,7 @@ community. It needs and welcomes help. For details see
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| [Parse string into DateTime struct][ex-parse-datetime] | [![chrono-badge]][chrono] | [![cat-date-and-time-badge]][cat-date-and-time] |
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| [Perform checked date and time calculations][ex-datetime-arithmetic] | [![chrono-badge]][chrono] | [![cat-date-and-time-badge]][cat-date-and-time] |
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| [Examine the date and time][ex-examine-date-and-time] | [![chrono-badge]][chrono] | [![cat-date-and-time-badge]][cat-date-and-time] |
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| [File names that have been modified in the last 24 hours for the working directory][ex-file-24-hours-modified] | [![std-badge]][std] | [![cat-filesystem-badge]][cat-filesystem] [![cat-os-badge]][cat-os] |
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## [Encoding](encoding.html)
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@ -188,7 +189,7 @@ community. It needs and welcomes help. For details see
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[ex-extract-hashtags]: basics.html#ex-extract-hashtags
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[ex-extract-links-webpage]: net.html#ex-extract-links-webpage
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[ex-extract-mediawiki-links]: net.html#ex-extract-mediawiki-links
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[ex-format-datetime]: basics.html#ex-format-datetime
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[ex-file-24-hours-modified]: basics.html#ex-file-24-hours-modified
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[ex-file-post]: net.html#ex-file-post
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[ex-file-predicate]: app.html#ex-file-predicate
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[ex-file-sizes]: app.html#ex-file-sizes
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@ -112,7 +112,7 @@ Keep lines sorted.
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[serde-json-badge]: https://badge-cache.kominick.com/crates/v/serde_json.svg?label=serde_json
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[serde-json]: https://docs.serde.rs/serde_json/
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[serde]: https://docs.rs/serde/
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[std-badge]: https://badge-cache.kominick.com/badge/std-1.22.1-blue.svg
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[std-badge]: https://badge-cache.kominick.com/badge/std-1.25.0-blue.svg
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[std]: https://doc.rust-lang.org/std
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[syslog-badge]: https://badge-cache.kominick.com/crates/v/syslog.svg?label=syslog
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[syslog]: https://docs.rs/syslog/
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