cli/encapsulate: Add --authfile

Ideally we'd pass through all of the proxy options here, but
doing that sanely really requires being able to do *pushes*
through containers-image-proxy-rs, which is a quite nontrivial
amount of work.

For now, let's pass through `--authfile` which is the main thing
people want.  Anything else can be worked around by encapsulating
to `oci` and then doing a `skopeo copy` from there.

cc ostreedev/ostree#3015

lib/src/cli.rs

@@ -129,6 +129,10 @@ pub(crate) enum ContainerOpts {
         #[clap(name = "label", long, short)]
         labels: Vec<String>,
 
+        #[clap(long)]
+        /// Path to Docker-formatted authentication file.
+        authfile: Option<PathBuf>,
+
         /// Propagate an OSTree commit metadata key to container label
         #[clap(name = "copymeta", long)]
         copy_meta_keys: Vec<String>,
@@ -624,6 +628,7 @@ async fn container_export(
     rev: &str,
     imgref: &ImageReference,
     labels: BTreeMap<String, String>,
+    authfile: Option<PathBuf>,
     copy_meta_keys: Vec<String>,
     copy_meta_opt_keys: Vec<String>,
     cmd: Option<Vec<String>>,
@@ -636,6 +641,7 @@ async fn container_export(
     let opts = crate::container::ExportOpts {
         copy_meta_keys,
         copy_meta_opt_keys,
+        authfile,
         skip_compression: compression_fast, // TODO rename this in the struct at the next semver break
         ..Default::default()
     };
@@ -847,6 +853,7 @@ async fn run_from_opt(opt: Opt) -> Result<()> {
                 rev,
                 imgref,
                 labels,
+                authfile,
                 copy_meta_keys,
                 copy_meta_opt_keys,
                 cmd,
@@ -867,6 +874,7 @@ async fn run_from_opt(opt: Opt) -> Result<()> {
                     &rev,
                     &imgref,
                     labels?,
+                    authfile,
                     copy_meta_keys,
                     copy_meta_opt_keys,
                     cmd,

lib/src/container/encapsulate.rs

@@ -348,6 +348,8 @@ async fn build_impl(
         let tempdest = tempdir.path().join("d");
         let tempdest = tempdest.to_str().unwrap();
 
+        // Minor TODO: refactor to avoid clone
+        let authfile = opts.authfile.clone();
         let tempoci = build_oci(
             repo,
             ostree_ref,
@@ -359,7 +361,7 @@ async fn build_impl(
             contentmeta,
         )?;
 
-        let digest = skopeo::copy(&tempoci, dest).await?;
+        let digest = skopeo::copy(&tempoci, dest, authfile.as_deref()).await?;
         Some(digest)
     };
     if let Some(digest) = digest {
@@ -377,7 +379,7 @@ async fn build_impl(
 }
 
 /// Options controlling commit export into OCI
-#[derive(Debug, Default)]
+#[derive(Clone, Debug, Default)]
 pub struct ExportOpts {
     /// If true, do not perform gzip compression of the tar layers.
     pub skip_compression: bool,
@@ -387,6 +389,8 @@ pub struct ExportOpts {
     pub copy_meta_opt_keys: Vec<String>,
     /// Maximum number of layers to use
     pub max_layers: Option<NonZeroU32>,
+    /// Path to Docker-formatted authentication file.
+    pub authfile: Option<std::path::PathBuf>,
     // TODO semver-break: remove this
     /// Use only the standard OCI version label
     pub no_legacy_version_label: bool,

lib/src/container/skopeo.rs

@@ -4,6 +4,7 @@ use super::ImageReference;
 use anyhow::{Context, Result};
 use serde::Deserialize;
 use std::io::Read;
+use std::path::Path;
 use std::process::Stdio;
 use tokio::process::Command;
 
@@ -58,12 +59,16 @@ pub(crate) fn spawn(mut cmd: Command) -> Result<tokio::process::Child> {
 }
 
 /// Use skopeo to copy a container image.
-pub(crate) async fn copy(src: &ImageReference, dest: &ImageReference) -> Result<String> {
+pub(crate) async fn copy(src: &ImageReference, dest: &ImageReference, authfile: Option<&Path>) -> Result<String> {
     let digestfile = tempfile::NamedTempFile::new()?;
     let mut cmd = new_cmd();
     cmd.stdout(std::process::Stdio::null()).arg("copy");
     cmd.arg("--digestfile");
     cmd.arg(digestfile.path());
+    if let Some(authfile) = authfile {
+        cmd.arg("--authfile");
+        cmd.arg(authfile);
+    }
     cmd.args(&[src.to_string(), dest.to_string()]);
     let proc = super::skopeo::spawn(cmd)?;
     let output = proc.wait_with_output().await?;

lib/src/container/update_detachedmeta.rs

@@ -29,7 +29,7 @@ pub async fn update_detached_metadata(
     };
 
     // Full copy of the source image
-    let pulled_digest: String = skopeo::copy(src, &tempsrc_ref)
+    let pulled_digest: String = skopeo::copy(src, &tempsrc_ref, None)
         .await
         .context("Creating temporary copy to OCI dir")?;
 
@@ -124,7 +124,7 @@ pub async fn update_detached_metadata(
 
     // Finally, copy the mutated image back to the target.  For chunked images,
     // because we only changed one layer, skopeo should know not to re-upload shared blobs.
-    crate::container::skopeo::copy(&tempsrc_ref, dest)
+    crate::container::skopeo::copy(&tempsrc_ref, dest, None)
         .await
         .context("Copying to destination")
 }