Support --layers squash-other, add colors to clap

CHANGELOG.md

@@ -1,4 +1,10 @@
 
+# v0.3.2
+
+- General: Add color to CLI output.
+- `extract`: Add `--squash-other` mode.
+  - `--layers squash-other`: Squash all layers other than the base layer.
+
 # v0.3.1
 
 - `extract`: absolute symlinks are now correctly made relative to the target directory.

README.md

@@ -55,6 +55,7 @@ Extracts the contents of the image to disk.
 # Options for `circe extract`:
 #   --layers
 #       squash: Combines all layers into a single layer (default).
+#       squash-other: Combines all layers except the base layer into a single layer.
 #       base: Excludes all layers except the base layer.
 #       separate: Exports each layer in a separate subdirectory.
 #   --platform

bin/Cargo.toml

@@ -14,7 +14,7 @@ categories = ["command-line-utilities", "development-tools"]
 default-run = "circe"
 
 [dependencies]
-clap = { version = "4.5.23", features = ["derive"] }
+clap = { version = "4.5.23", features = ["color", "derive"] }
 color-eyre = "0.6.3"
 tokio = { version = "1.42.0", features = ["full"] }
 tracing = "0.1.41"

bin/src/extract.rs

@@ -119,6 +119,9 @@ pub enum Mode {
     /// Only extract the base layer.
     Base,
 
+    /// Squash all "other" layers; "other" layers are all layers except the base layer.
+    SquashOther,
+
     /// Extract all layers to a separate directory for each layer.
     /// Also writes a `layers.json` file containing the list of layers in application order.
     Separate,
@@ -152,6 +155,7 @@ pub async fn main(opts: Options) -> Result<()> {
     let layers = registry.layers().await.context("list layers")?;
     match opts.layers {
         Mode::Squash => squash(&registry, &output, layers).await,
+        Mode::SquashOther => squash(&registry, &output, layers.into_iter().skip(1)).await,
         Mode::Base => squash(&registry, &output, layers.into_iter().take(1)).await,
         Mode::Separate => separate(&registry, &output, layers).await,
     }

bin/src/main.rs

@@ -1,12 +1,15 @@
-use clap::Parser;
+use clap::{
+    builder::{styling::AnsiColor, Styles},
+    Parser,
+};
 use color_eyre::eyre::Result;
 use tracing::level_filters::LevelFilter;
 use tracing_subscriber::{self, prelude::*};
 
 mod extract;
 mod list;
 #[derive(Debug, Parser)]
-#[command(author, version, about)]
+#[command(version, about, styles = style())]
 struct Cli {
     #[command(subcommand)]
     command: Commands,
@@ -54,3 +57,14 @@ async fn main() -> Result<()> {
 
     Ok(())
 }
+
+fn style() -> Styles {
+    Styles::styled()
+        .header(AnsiColor::Yellow.on_default())
+        .usage(AnsiColor::Green.on_default())
+        .literal(AnsiColor::Green.on_default())
+        .placeholder(AnsiColor::Green.on_default())
+        .error(AnsiColor::Red.on_default())
+        .invalid(AnsiColor::Red.on_default())
+        .valid(AnsiColor::Blue.on_default())
+}