feat: allow credential fill with gix credential fill to run without a repo (#2198)

Author: ralphmodales

gitoxide-core/src/repository/credential.rs

@@ -6,9 +6,11 @@ enum Error {
     Configuration(#[from] gix::config::credential_helpers::Error),
     #[error(transparent)]
     Protocol(#[from] gix::credentials::protocol::Error),
+    #[error(transparent)]
+    ConfigLoad(#[from] gix::config::file::init::from_paths::Error),
 }
 
-pub fn function(repo: gix::Repository, action: gix::credentials::program::main::Action) -> anyhow::Result<()> {
+pub fn function(repo: Option<gix::Repository>, action: gix::credentials::program::main::Action) -> anyhow::Result<()> {
     use gix::credentials::program::main::Action::*;
     gix::credentials::program::main(
         Some(action.as_str().into()),
@@ -20,9 +22,24 @@ pub fn function(repo: gix::Repository, action: gix::credentials::program::main::
                 .clone()
                 .or_else(|| context.to_url())
                 .ok_or(Error::Protocol(gix::credentials::protocol::Error::UrlMissing))?;
-            let (mut cascade, _action, prompt_options) = repo
-                .config_snapshot()
-                .credential_helpers(gix::url::parse(url.as_ref())?)?;
+
+            let (mut cascade, _action, prompt_options) = match repo {
+                Some(ref repo) => repo
+                    .config_snapshot()
+                    .credential_helpers(gix::url::parse(url.as_ref())?)?,
+                None => {
+                    let config = gix::config::File::from_globals()?;
+                    let environment = gix::open::permissions::Environment::all();
+                    gix::config::credential_helpers(
+                        gix::url::parse(url.as_ref())?,
+                        &config,
+                        false,
+                        |_| true,
+                        environment,
+                        false,
+                    )?
+                }
+            };
             cascade
                 .invoke(
                     match action {

src/plumbing/main.rs

@@ -658,7 +658,7 @@ pub fn main() -> Result<()> {
         }
         Subcommands::ConfigTree => show_progress(),
         Subcommands::Credential(cmd) => core::repository::credential(
-            repository(Mode::StrictWithGitInstallConfig)?,
+            repository(Mode::StrictWithGitInstallConfig).ok(),
             match cmd {
                 credential::Subcommands::Fill => gix::credentials::program::main::Action::Get,
                 credential::Subcommands::Approve => gix::credentials::program::main::Action::Store,