feat: Implement --force (#127)

* Fix lints

* Implement force for registry

* Typos

* Implement force for version mismatch

src/cli.rs

@@ -29,7 +29,7 @@ pub struct Override {
 
     #[arg(long)]
     /// Name of the registry to use.
-    /// Usually `cargo-override` can correctly determine which regestiry to use without needing this flag
+    /// Usually `cargo-override` can correctly determine which registry to use without needing this flag
     pub registry: Option<String>,
 
     /// Path to the `Cargo.toml` file that needs patching.
@@ -46,6 +46,10 @@ pub struct Override {
     /// Equivalent to specifying both --locked and --offline
     #[arg(long)]
     pub frozen: bool,
+
+    /// Force the override, ignoring compatibility checks.
+    #[arg(long)]
+    pub force: bool,
 }
 
 #[derive(Args, Debug)]

src/context.rs

@@ -13,6 +13,8 @@ pub struct Context {
     pub manifest_path: Option<Utf8PathBuf>,
 
     pub mode: Mode,
+
+    pub force: bool,
 }
 
 #[derive(Copy, Clone)]
@@ -40,6 +42,7 @@ impl TryFrom<Cli> for Context {
                     manifest_path,
                     source: cli::Source { path, git },
                     git: cli::Git { branch, tag, rev },
+                    force,
                 }),
         }: Cli,
     ) -> Result<Self, Self::Error> {
@@ -79,6 +82,8 @@ impl TryFrom<Cli> for Context {
             manifest_path,
 
             mode,
+
+            force,
         })
     }
 }

src/lib.rs

@@ -11,7 +11,7 @@ pub use context::Context;
 
 use std::path::{Path, PathBuf};
 
-use anyhow::{bail, Context as _};
+use anyhow::{bail, ensure, Context as _};
 use fs_err as fs;
 
 pub static DEFAULT_REGISTRY: &str = "crates-io";
@@ -24,6 +24,7 @@ pub fn run(working_dir: &Path, args: Cli) -> anyhow::Result<()> {
         manifest_path,
         registry_hint,
         mode,
+        force,
     } = args.try_into()?;
 
     let path = match &mode {
@@ -47,7 +48,7 @@ pub fn run(working_dir: &Path, args: Cli) -> anyhow::Result<()> {
 
     let manifest_path = project_manifest(manifest_dir, cargo)?;
 
-    let project_deps = metadata::direct_dependencies(&manifest_dir, cargo)
+    let project_deps = metadata::direct_dependencies(manifest_dir, cargo)
         .context("failed to get dependencies for current project")?;
 
     let mut direct_deps = project_deps
@@ -56,19 +57,18 @@ pub fn run(working_dir: &Path, args: Cli) -> anyhow::Result<()> {
         .peekable();
 
     let dependency = if direct_deps.peek().is_some() {
-        if let Some(dep) = direct_deps.find(|dependency| match dependency.requirement {
-            Some(ref req) => req.matches(&patch_manifest.version),
-            None => false,
-        }) {
-            dep.clone()
-        } else {
-            bail!("patch could not be applied because version is incompatible")
-        }
+        direct_deps
+            .find(|dep| {
+                dep.requirement
+                    .as_ref()
+                    .is_some_and(|req| req.matches(&patch_manifest.version) || force)
+            })
+            .context("patch could not be applied because version is incompatible")?
     } else {
         let resolved_deps = metadata::resolved_dependencies(manifest_dir, cargo)
             .context("failed to get dependencies for current project")?;
 
-        resolved_deps
+        &resolved_deps
             .into_iter()
             .find(|dep| dep.name == patch_manifest.name)
             .with_context(|| {
@@ -82,7 +82,7 @@ pub fn run(working_dir: &Path, args: Cli) -> anyhow::Result<()> {
     let dependency_registry = if dependency.registry == Some(DEFAULT_REGISTRY_URL.to_owned()) {
         None
     } else {
-        dependency.registry
+        dependency.registry.as_deref()
     };
 
     let registry = if let Some(registry_url) = &dependency_registry {
@@ -97,16 +97,17 @@ pub fn run(working_dir: &Path, args: Cli) -> anyhow::Result<()> {
                 registry_guess
             }
             (Some(registry_flag), Some(registry_guess)) => {
-                // TODO: force is unimplemented
-                bail!(
+                ensure!(
+                    force,
                     "user provided registry `{}` with the `--registry` flag \
                      but dependency `{}` \
                      uses registry `{}`. 
                      To use the registry, you passed, use `--force`",
                     registry_flag,
                     dependency.name,
                     registry_guess
-                )
+                );
+                registry_flag
             }
             (None, None) => bail!(
                 "unable to determine registry name for `{}`

tests/all/cli.rs

@@ -60,7 +60,7 @@ fn override_subcommand_help_message() {
                   --rev <REV>
                       Specific commit to use when overriding from git
                   --registry <REGISTRY>
-                      Name of the registry to use. Usually `cargo-override` can correctly determine which regestiry to use without needing this flag
+                      Name of the registry to use. Usually `cargo-override` can correctly determine which registry to use without needing this flag
                   --manifest-path <MANIFEST_PATH>
                       Path to the `Cargo.toml` file that needs patching. By default, `cargo-override` searches for the `Cargo.toml` file in the current directory or any parent directory
                   --locked
@@ -69,6 +69,8 @@ fn override_subcommand_help_message() {
                       Prevents cargo from accessing the network
                   --frozen
                       Equivalent to specifying both --locked and --offline
+                  --force
+                      Force the override, ignoring compatibility checks
               -h, --help
                       Print help
               -V, --version