feat(add): --channel parameter to specify channel.

crates/pixi/tests/integration_rust/common/mod.rs

@@ -429,6 +429,7 @@ impl PixiControl {
                 },
                 config: Default::default(),
                 editable: false,
+                channel: None,
             },
         }
     }

crates/pixi_api/src/context.rs

@@ -10,7 +10,9 @@ use pixi_manifest::{
 };
 use pixi_pypi_spec::{PixiPypiSpec, PypiPackageName};
 use pixi_spec::PixiSpec;
-use rattler_conda_types::{Channel, MatchSpec, PackageName, Platform, RepoDataRecord};
+use rattler_conda_types::{
+    Channel, MatchSpec, NamedChannelOrUrl, PackageName, Platform, RepoDataRecord,
+};
 
 use crate::interface::Interface;
 use crate::workspace::add::GitOptions;
@@ -175,13 +177,15 @@ impl<I: Interface> WorkspaceContext<I> {
         spec_type: SpecType,
         dep_options: DependencyOptions,
         git_options: GitOptions,
+        channel: Option<Vec<NamedChannelOrUrl>>,
     ) -> miette::Result<Option<UpdateDeps>> {
         Box::pin(crate::workspace::add::add_conda_dep(
             self.workspace_mut()?,
             specs,
             spec_type,
             dep_options,
             git_options,
+            channel,
         ))
         .await
     }

crates/pixi_api/src/workspace/add/mod.rs

@@ -4,10 +4,11 @@ use pixi_core::{
     environment::sanity_check_workspace,
     workspace::{PypiDeps, UpdateDeps, WorkspaceMut},
 };
+use pixi_manifest::PrioritizedChannel;
 use pixi_manifest::{FeatureName, KnownPreviewFeature, SpecType};
 use pixi_spec::{GitSpec, SourceLocationSpec, SourceSpec};
-use rattler_conda_types::{MatchSpec, PackageName};
-
+use rattler_conda_types::{MatchSpec, NamedChannelOrUrl, PackageName};
+use std::str::FromStr;
 mod options;
 
 pub use options::{DependencyOptions, GitOptions};
@@ -18,6 +19,7 @@ pub async fn add_conda_dep(
     spec_type: SpecType,
     dep_options: DependencyOptions,
     git_options: GitOptions,
+    channel: Option<Vec<NamedChannelOrUrl>>,
 ) -> miette::Result<Option<UpdateDeps>> {
     sanity_check_workspace(workspace.workspace()).await?;
 
@@ -29,6 +31,30 @@ pub async fn add_conda_dep(
     let mut match_specs = IndexMap::default();
     let mut source_specs = IndexMap::default();
 
+    // Add a channel if specified
+
+    if channel.is_some() {
+        for ch in channel.unwrap() {
+            workspace.manifest().add_channels(
+                [PrioritizedChannel::from(ch.clone())],
+                &dep_options.feature,
+                false,
+            )?;
+        }
+    }
+
+    for (_, spec) in &specs {
+        if let Some(channel) = spec.channel.as_ref() {
+            let channel = NamedChannelOrUrl::from_str(channel.as_ref().base_url.as_str()).unwrap();
+            workspace.manifest().add_channels(
+                [PrioritizedChannel::from(channel)],
+                &dep_options.feature,
+                false,
+            )?;
+        } else {
+            continue;
+        }
+    }
     // if user passed some git configuration
     // we will use it to create pixi source specs
     let passed_specs: IndexMap<PackageName, (MatchSpec, SpecType)> = specs

crates/pixi_cli/src/add.rs

@@ -5,6 +5,7 @@ use pixi_api::{
 };
 use pixi_config::ConfigCli;
 use pixi_core::{DependencyType, WorkspaceLocator};
+use rattler_conda_types::NamedChannelOrUrl;
 
 use crate::{
     cli_config::{DependencyConfig, LockFileUpdateConfig, NoInstallConfig, WorkspaceConfig},
@@ -92,6 +93,10 @@ pub struct Args {
     /// Whether the pypi requirement should be editable
     #[arg(long, requires = "pypi")]
     pub editable: bool,
+
+    // Specify channel
+    #[arg(long)]
+    pub channel: Option<Vec<NamedChannelOrUrl>>,
 }
 
 impl TryFrom<&Args> for DependencyOptions {
@@ -154,6 +159,7 @@ pub async fn execute(args: Args) -> miette::Result<()> {
                     spec_type,
                     (&args).try_into()?,
                     git_options,
+                    args.channel,
                 )
                 .await?
         }

docs/reference/cli/pixi/add.md

@@ -26,6 +26,8 @@ pixi add [OPTIONS] <SPEC>...
 - <a id="arg---feature" href="#arg---feature">`--feature (-f) <FEATURE>`</a>
 :  The feature for which the dependency should be modified
 <br>**default**: `default`
+- <a id="arg---channel" href="#arg---channel">`--channel` <CHANNEL></a>
+:  Specify channel for the dependency
 - <a id="arg---editable" href="#arg---editable">`--editable`</a>
 :  Whether the pypi requirement should be editable
 

tests/integration_python/test_main_cli.py

@@ -1380,7 +1380,7 @@ def test_add_url_no_channel(pixi: Path, tmp_pixi_workspace: Path) -> None:
 
     verify_cli_command([pixi, "init", tmp_pixi_workspace])
 
-    # helpful error for missing channel
+    # verify channel can be added using matchspec syntax
     verify_cli_command(
         [
             pixi,
@@ -1389,102 +1389,31 @@ def test_add_url_no_channel(pixi: Path, tmp_pixi_workspace: Path) -> None:
             "--manifest-path",
             tmp_pixi_workspace,
         ],
-        expected_exit_code=ExitCode.FAILURE,
-        stderr_contains="pixi workspace channel add https://repo.prefix.dev/bioconda",
     )
 
+    # test channel parameter with url
     verify_cli_command(
         [
             pixi,
-            "workspace",
-            "channel",
-            "add",
-            "https://repo.prefix.dev/bioconda",
-            "--manifest-path",
-            tmp_pixi_workspace,
-        ],
-    )
-    # successful after adding the channel
-    verify_cli_command(
-        [
-            pixi,
-            "add",
-            "https://repo.prefix.dev/bioconda::snakemake-minimal",
-            "--manifest-path",
-            tmp_pixi_workspace,
-        ],
-        stderr_contains="Added https://repo.prefix.dev/bioconda::snakemake-minimal",
-    )
-
-    # no message for initially unused feature...
-    verify_cli_command(
-        [
-            pixi,
-            "add",
-            "https://conda.anaconda.org/conda-forge::xz",
-            "--feature=prefix",
-            "--manifest-path",
-            tmp_pixi_workspace,
-        ],
-    )
-    verify_cli_command(
-        [
-            pixi,
-            "workspace",
-            "environment",
             "add",
-            "prefix",
-            "--feature=prefix",
-            "--manifest-path",
-            tmp_pixi_workspace,
-        ],
-    )
-    # ...but decent message on install:
-    verify_cli_command(
-        [
-            pixi,
-            "install",
-            "--environment=prefix",
-            "--manifest-path",
-            tmp_pixi_workspace,
-        ],
-        expected_exit_code=ExitCode.FAILURE,
-        stderr_contains="unavailable channel 'https://conda.anaconda.org/conda-forge/'",
-    )
-    # and helpful message now feature is used:
-    verify_cli_command(
-        [
-            pixi,
-            "add",
-            "https://conda.anaconda.org/conda-forge::libzlib",
-            "--feature=prefix",
-            "--manifest-path",
-            tmp_pixi_workspace,
-        ],
-        expected_exit_code=ExitCode.FAILURE,
-        stderr_contains="pixi workspace channel add https://conda.anaconda.org/conda-forge",
-    )
-
-    verify_cli_command(
-        [
-            pixi,
-            "workspace",
-            "channel",
-            "add",
-            "--feature=prefix",
+            "--channel",
             "https://conda.anaconda.org/conda-forge",
+            "libzlib",
             "--manifest-path",
             tmp_pixi_workspace,
         ],
+        stderr_contains="Added libzlib",
     )
-    # successful after adding the channel
+    # test channel parameter with name
     verify_cli_command(
         [
             pixi,
-            "install",
-            "--environment=prefix",
+            "add",
+            "--channel",
+            "conda-forge",
+            "libzlib",
             "--manifest-path",
             tmp_pixi_workspace,
         ],
-        stderr_contains="The prefix environment has been installed",
+        stderr_contains="Added libzlib",
     )