support for parsing multiple specs in one invocation (#427)

Author: Byron

Diff for: gitoxide-core/src/repository/revision/parse.rs

@@ -12,21 +12,34 @@ pub(crate) mod function {
 
     pub fn parse(
         mut repo: git::Repository,
-        spec: OsString,
+        specs: Vec<OsString>,
         mut out: impl std::io::Write,
         Options { format }: Options,
     ) -> anyhow::Result<()> {
         repo.object_cache_size_if_unset(1024 * 1024);
-        let spec = git::path::os_str_into_bstr(&spec)?;
-        let spec = repo.rev_parse(spec)?.detach();
 
         match format {
             OutputFormat::Human => {
-                writeln!(out, "{spec}")?;
+                for spec in specs {
+                    let spec = git::path::os_str_into_bstr(&spec)?;
+                    let spec = repo.rev_parse(spec)?.detach();
+                    writeln!(out, "{spec}")?;
+                }
             }
             #[cfg(feature = "serde1")]
             OutputFormat::Json => {
-                serde_json::to_writer_pretty(&mut out, &spec)?;
+                serde_json::to_writer_pretty(
+                    &mut out,
+                    &specs
+                        .into_iter()
+                        .map(|spec| {
+                            git::path::os_str_into_bstr(&spec)
+                                .map_err(anyhow::Error::from)
+                                .and_then(|spec| repo.rev_parse(spec).map_err(Into::into))
+                                .map(|spec| spec.detach())
+                        })
+                        .collect::<Result<Vec<_>, _>>()?,
+                )?;
             }
         }
         Ok(())

Diff for: src/plumbing/main.rs

@@ -524,7 +524,7 @@ pub fn main() -> Result<()> {
                 None,
                 move |_progress, out, _err| core::repository::revision::explain(spec, out),
             ),
-            revision::Subcommands::Parse { spec } => prepare_and_run(
+            revision::Subcommands::Parse { specs } => prepare_and_run(
                 "revision-parse",
                 verbose,
                 progress,
@@ -533,7 +533,7 @@ pub fn main() -> Result<()> {
                 move |_progress, out, _err| {
                     core::repository::revision::parse(
                         repository()?,
-                        spec,
+                        specs,
                         out,
                         core::repository::revision::parse::Options { format },
                     )

Diff for: src/plumbing/options.rs

@@ -186,7 +186,10 @@ pub mod revision {
         Explain { spec: std::ffi::OsString },
         /// Try to resolve the given revspec and print the object names.
         #[clap(visible_alias = "query")]
-        Parse { spec: std::ffi::OsString },
+        Parse {
+            #[clap(min_values = 1)]
+            specs: Vec<std::ffi::OsString>,
+        },
     }
 }