[pbs-devel] [PATCH v3 proxmox-backup 3/4] debug cli: add colored output for `diff archive`
Lukas Wagner
l.wagner at proxmox.com
Wed Dec 7 10:38:18 CET 2022
This commit adds the `--color` flag to the `diff archive` tool.
Valid values are `always`, `auto` and `never`. `always` and
`never` should be self-explanatory, whereas `auto` will enable
colors unless one of the following is true:
- STDOUT is not a tty
- TERM=dumb is set
- NO_COLOR is set
The tool will highlight changed file attributes in yellow.
Furthermore, (A)dded files are highlighted in green,
(M)odified in yellow and (D)eleted in red.
Signed-off-by: Lukas Wagner <l.wagner at proxmox.com>
---
Changes from v2:
- Drop dependency on `atty` crate
- Remove modificiations to debian/control
Cargo.toml | 1 +
src/bin/proxmox_backup_debug/diff.rs | 371 ++++++++++++++++++++++-----
2 files changed, 306 insertions(+), 66 deletions(-)
diff --git a/Cargo.toml b/Cargo.toml
index 8ee48127..7fac1bfa 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -75,6 +75,7 @@ serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"
siphasher = "0.3"
syslog = "4.0"
+termcolor = "1.1.2"
tokio = { version = "1.6", features = [ "fs", "io-util", "io-std", "macros", "net", "parking_lot", "process", "rt", "rt-multi-thread", "signal", "time" ] }
tokio-openssl = "0.6.1"
tokio-stream = "0.1.0"
diff --git a/src/bin/proxmox_backup_debug/diff.rs b/src/bin/proxmox_backup_debug/diff.rs
index a8a4e08d..2149720f 100644
--- a/src/bin/proxmox_backup_debug/diff.rs
+++ b/src/bin/proxmox_backup_debug/diff.rs
@@ -1,5 +1,6 @@
use std::collections::{HashMap, HashSet};
use std::ffi::{OsStr, OsString};
+use std::io::Write;
use std::iter::FromIterator;
use std::path::{Path, PathBuf};
use std::sync::Arc;
@@ -28,6 +29,8 @@ use pbs_tools::json::required_string_param;
use pxar::accessor::ReadAt;
use pxar::EntryKind;
use serde_json::Value;
+
+use termcolor::{Color, ColorChoice, ColorSpec, StandardStream, WriteColor};
use tokio::io::AsyncReadExt;
type ChunkDigest = [u8; 32];
@@ -87,6 +90,11 @@ pub fn diff_commands() -> CommandLineInterface {
type: bool,
description: "Compare file content rather than solely relying on mtime for detecting modified files.",
},
+ "color": {
+ optional: true,
+ type: String,
+ description: "Set mode for colored output. Can be `always`, `auto` or `never`. `auto` will display colors only if stdout is a tty. Defaults to `auto`."
+ }
}
}
)]
@@ -106,6 +114,12 @@ async fn diff_archive_cmd(param: Value) -> Result<(), Error> {
None => false,
};
+ let color = match param.get("color") {
+ Some(Value::String(color)) => color.as_str().try_into()?,
+ Some(_) => bail!("invalid color parameter. Valid choices are `always`, `auto` and `never`"),
+ None => ColorMode::Auto,
+ };
+
let namespace = match param.get("ns") {
Some(Value::String(ns)) => ns.parse()?,
Some(_) => bail!("invalid namespace parameter"),
@@ -133,6 +147,8 @@ async fn diff_archive_cmd(param: Value) -> Result<(), Error> {
namespace,
};
+ let output_params = OutputParams { color };
+
if archive_name.ends_with(".pxar") {
let file_name = format!("{}.didx", archive_name);
diff_archive(
@@ -141,6 +157,7 @@ async fn diff_archive_cmd(param: Value) -> Result<(), Error> {
&file_name,
&repo_params,
compare_contents,
+ &output_params,
)
.await?;
} else {
@@ -156,6 +173,7 @@ async fn diff_archive(
file_name: &str,
repo_params: &RepoParams,
compare_contents: bool,
+ output_params: &OutputParams,
) -> Result<(), Error> {
let (index_a, accessor_a) = open_dynamic_index(snapshot_a, file_name, repo_params).await?;
let (index_b, accessor_b) = open_dynamic_index(snapshot_b, file_name, repo_params).await?;
@@ -209,17 +227,40 @@ async fn diff_archive(
// which where *really* modified.
let modified_files = compare_files(potentially_modified, compare_contents).await?;
- show_file_list(&added_files, &deleted_files, &modified_files);
+ show_file_list(&added_files, &deleted_files, &modified_files, output_params)?;
Ok(())
}
+enum ColorMode {
+ Always,
+ Auto,
+ Never,
+}
+
+impl TryFrom<&str> for ColorMode {
+ type Error = Error;
+
+ fn try_from(value: &str) -> Result<Self, Self::Error> {
+ match value {
+ "auto" => Ok(Self::Auto),
+ "always" => Ok(Self::Always),
+ "never" => Ok(Self::Never),
+ _ => bail!("invalid color parameter. Valid choices are `always`, `auto` and `never`"),
+ }
+ }
+}
+
struct RepoParams {
repo: BackupRepository,
crypt_config: Option<Arc<CryptConfig>>,
namespace: BackupNamespace,
}
+struct OutputParams {
+ color: ColorMode,
+}
+
async fn open_dynamic_index(
snapshot: &str,
archive_name: &str,
@@ -531,70 +572,271 @@ impl ChangedProperties {
}
}
-fn change_indicator(changed: bool) -> &'static str {
- if changed {
- "*"
- } else {
- " "
- }
+enum FileOperation {
+ Added,
+ Modified,
+ Deleted,
}
-fn format_filesize(entry: &FileEntry, changed: bool) -> String {
- if let Some(size) = entry.file_size() {
- format!(
- "{}{:.1}",
- change_indicator(changed),
- HumanByte::new_decimal(size as f64)
- )
- } else {
- String::new()
+struct ColumnWidths {
+ operation: usize,
+ entry_type: usize,
+ uid: usize,
+ gid: usize,
+ mode: usize,
+ filesize: usize,
+ mtime: usize,
+}
+
+impl Default for ColumnWidths {
+ fn default() -> Self {
+ Self {
+ operation: 1,
+ entry_type: 2,
+ uid: 6,
+ gid: 6,
+ mode: 6,
+ filesize: 10,
+ mtime: 11,
+ }
}
}
-fn format_mtime(entry: &FileEntry, changed: bool) -> String {
- let mtime = &entry.metadata().stat.mtime;
+struct FileEntryPrinter {
+ stream: StandardStream,
+ column_widths: ColumnWidths,
+ changed_color: Color,
+}
- let mut format = change_indicator(changed).to_owned();
- format.push_str("%F %T");
+impl FileEntryPrinter {
+ pub fn new(output_params: &OutputParams) -> Self {
+ let color_choice = match output_params.color {
+ ColorMode::Always => ColorChoice::Always,
+ ColorMode::Auto => {
+ if unsafe { libc::isatty(1) == 1 } {
+ // Show colors unless `TERM=dumb` or `NO_COLOR` is set.
+ ColorChoice::Auto
+ } else {
+ ColorChoice::Never
+ }
+ }
+ ColorMode::Never => ColorChoice::Never,
+ };
- proxmox_time::strftime_local(&format, mtime.secs).unwrap_or_default()
-}
+ let stdout = StandardStream::stdout(color_choice);
-fn format_mode(entry: &FileEntry, changed: bool) -> String {
- let mode = entry.metadata().stat.mode & 0o7777;
- format!("{}{:o}", change_indicator(changed), mode)
-}
+ Self {
+ stream: stdout,
+ column_widths: ColumnWidths::default(),
+ changed_color: Color::Yellow,
+ }
+ }
-fn format_entry_type(entry: &FileEntry, changed: bool) -> String {
- let kind = match entry.kind() {
- EntryKind::Symlink(_) => "l",
- EntryKind::Hardlink(_) => "h",
- EntryKind::Device(_) if entry.metadata().stat.is_blockdev() => "b",
- EntryKind::Device(_) => "c",
- EntryKind::Socket => "s",
- EntryKind::Fifo => "p",
- EntryKind::File { .. } => "f",
- EntryKind::Directory => "d",
- _ => " ",
- };
+ fn change_indicator(&self, changed: bool) -> &'static str {
+ if changed {
+ "*"
+ } else {
+ " "
+ }
+ }
- format!("{}{}", change_indicator(changed), kind)
-}
+ fn set_color_if_changed(&mut self, changed: bool) -> Result<(), Error> {
+ if changed {
+ self.stream
+ .set_color(ColorSpec::new().set_fg(Some(self.changed_color)))?;
+ }
-fn format_uid(entry: &FileEntry, changed: bool) -> String {
- format!("{}{}", change_indicator(changed), entry.metadata().stat.uid)
-}
+ Ok(())
+ }
-fn format_gid(entry: &FileEntry, changed: bool) -> String {
- format!("{}{}", change_indicator(changed), entry.metadata().stat.gid)
-}
+ fn write_operation(&mut self, op: FileOperation) -> Result<(), Error> {
+ let (text, color) = match op {
+ FileOperation::Added => ("A", Color::Green),
+ FileOperation::Modified => ("M", Color::Yellow),
+ FileOperation::Deleted => ("D", Color::Red),
+ };
-fn format_file_name(entry: &FileEntry, changed: bool) -> String {
- format!(
- "{}{}",
- change_indicator(changed),
- entry.file_name().to_string_lossy()
- )
+ self.stream
+ .set_color(ColorSpec::new().set_fg(Some(color)))?;
+
+ write!(
+ self.stream,
+ "{text:>width$}",
+ width = self.column_widths.operation,
+ )?;
+
+ self.stream.reset()?;
+
+ Ok(())
+ }
+
+ fn write_filesize(&mut self, entry: &FileEntry, changed: bool) -> Result<(), Error> {
+ let output = if let Some(size) = entry.file_size() {
+ format!(
+ "{}{:.1}",
+ self.change_indicator(changed),
+ HumanByte::new_decimal(size as f64)
+ )
+ } else {
+ String::new()
+ };
+
+ self.set_color_if_changed(changed)?;
+ write!(
+ self.stream,
+ "{output:>width$}",
+ width = self.column_widths.filesize,
+ )?;
+ self.stream.reset()?;
+
+ Ok(())
+ }
+
+ fn write_mtime(&mut self, entry: &FileEntry, changed: bool) -> Result<(), Error> {
+ let mtime = &entry.metadata().stat.mtime;
+
+ let mut format = self.change_indicator(changed).to_owned();
+ format.push_str("%F %T");
+
+ let output = proxmox_time::strftime_local(&format, mtime.secs).unwrap_or_default();
+
+ self.set_color_if_changed(changed)?;
+ write!(
+ self.stream,
+ "{output:>width$}",
+ width = self.column_widths.mtime,
+ )?;
+ self.stream.reset()?;
+
+ Ok(())
+ }
+
+ fn write_mode(&mut self, entry: &FileEntry, changed: bool) -> Result<(), Error> {
+ let mode = entry.metadata().stat.mode & 0o7777;
+ let output = format!("{}{:o}", self.change_indicator(changed), mode);
+
+ self.set_color_if_changed(changed)?;
+ write!(
+ self.stream,
+ "{output:>width$}",
+ width = self.column_widths.mode,
+ )?;
+ self.stream.reset()?;
+
+ Ok(())
+ }
+
+ fn write_entry_type(&mut self, entry: &FileEntry, changed: bool) -> Result<(), Error> {
+ let kind = match entry.kind() {
+ EntryKind::Symlink(_) => "l",
+ EntryKind::Hardlink(_) => "h",
+ EntryKind::Device(_) if entry.metadata().stat.is_blockdev() => "b",
+ EntryKind::Device(_) => "c",
+ EntryKind::Socket => "s",
+ EntryKind::Fifo => "p",
+ EntryKind::File { .. } => "f",
+ EntryKind::Directory => "d",
+ _ => " ",
+ };
+
+ let output = format!("{}{}", self.change_indicator(changed), kind);
+
+ self.set_color_if_changed(changed)?;
+ write!(
+ self.stream,
+ "{output:>width$}",
+ width = self.column_widths.entry_type,
+ )?;
+ self.stream.reset()?;
+
+ Ok(())
+ }
+
+ fn write_uid(&mut self, entry: &FileEntry, changed: bool) -> Result<(), Error> {
+ let output = format!(
+ "{}{}",
+ self.change_indicator(changed),
+ entry.metadata().stat.uid
+ );
+
+ self.set_color_if_changed(changed)?;
+ write!(
+ self.stream,
+ "{output:>width$}",
+ width = self.column_widths.uid,
+ )?;
+ self.stream.reset()?;
+ Ok(())
+ }
+
+ fn write_gid(&mut self, entry: &FileEntry, changed: bool) -> Result<(), Error> {
+ let output = format!(
+ "{}{}",
+ self.change_indicator(changed),
+ entry.metadata().stat.gid
+ );
+
+ self.set_color_if_changed(changed)?;
+ write!(
+ self.stream,
+ "{output:>width$}",
+ width = self.column_widths.gid,
+ )?;
+ self.stream.reset()?;
+ Ok(())
+ }
+
+ fn write_file_name(&mut self, entry: &FileEntry, changed: bool) -> Result<(), Error> {
+ self.set_color_if_changed(changed)?;
+ write!(
+ self.stream,
+ "{}{}",
+ self.change_indicator(changed),
+ entry.file_name().to_string_lossy()
+ )?;
+ self.stream.reset()?;
+
+ Ok(())
+ }
+
+ fn write_column_seperator(&mut self) -> Result<(), Error> {
+ write!(self.stream, " ")?;
+ Ok(())
+ }
+
+ /// Print a file entry, including `changed` indicators and column seperators
+ pub fn print_file_entry(
+ &mut self,
+ entry: &FileEntry,
+ changed: &ChangedProperties,
+ operation: FileOperation,
+ ) -> Result<(), Error> {
+ self.write_operation(operation)?;
+ self.write_column_seperator()?;
+
+ self.write_entry_type(entry, changed.entry_type)?;
+ self.write_column_seperator()?;
+
+ self.write_uid(entry, changed.uid)?;
+ self.write_column_seperator()?;
+
+ self.write_gid(entry, changed.gid)?;
+ self.write_column_seperator()?;
+
+ self.write_mode(entry, changed.mode)?;
+ self.write_column_seperator()?;
+
+ self.write_filesize(entry, changed.size)?;
+ self.write_column_seperator()?;
+
+ self.write_mtime(entry, changed.mtime)?;
+ self.write_column_seperator()?;
+
+ self.write_file_name(entry, changed.content)?;
+ writeln!(self.stream)?;
+
+ Ok(())
+ }
}
/// Display a sorted list of added, modified, deleted files.
@@ -602,7 +844,8 @@ fn show_file_list(
added: &HashMap<&OsStr, &FileEntry>,
deleted: &HashMap<&OsStr, &FileEntry>,
modified: &HashMap<&OsStr, (&FileEntry, ChangedProperties)>,
-) {
+ output_params: &OutputParams,
+) -> Result<(), Error> {
let mut all: Vec<&OsStr> = Vec::new();
all.extend(added.keys());
@@ -611,27 +854,23 @@ fn show_file_list(
all.sort();
+ let mut printer = FileEntryPrinter::new(output_params);
+
for file in all {
- let (op, entry, changed) = if let Some(entry) = added.get(file) {
- ("A", entry, ChangedProperties::default())
+ let (operation, entry, changed) = if let Some(entry) = added.get(file) {
+ (FileOperation::Added, entry, ChangedProperties::default())
} else if let Some(entry) = deleted.get(file) {
- ("D", entry, ChangedProperties::default())
+ (FileOperation::Deleted, entry, ChangedProperties::default())
} else if let Some((entry, changed)) = modified.get(file) {
- ("M", entry, *changed)
+ (FileOperation::Modified, entry, *changed)
} else {
unreachable!();
};
- let entry_type = format_entry_type(entry, changed.entry_type);
- let uid = format_uid(entry, changed.uid);
- let gid = format_gid(entry, changed.gid);
- let mode = format_mode(entry, changed.mode);
- let size = format_filesize(entry, changed.size);
- let mtime = format_mtime(entry, changed.mtime);
- let name = format_file_name(entry, changed.content);
-
- println!("{op} {entry_type:>2} {mode:>5} {uid:>6} {gid:>6} {size:>10} {mtime:11} {name}");
+ printer.print_file_entry(entry, &changed, operation)?;
}
+
+ Ok(())
}
#[cfg(test)]
--
2.30.2
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