[RFC PATCH 4/6] contrib/cgit-rs: add repo initialization and config access

[Josh Steadmon <steadmon@xxxxxxxxxx>]

From: Calvin Wan <calvinwan@xxxxxxxxxx>

Co-authored-by: Josh Steadmon <steadmon@xxxxxxxxxx>
Signed-off-by: Calvin Wan <calvinwan@xxxxxxxxxx>
Signed-off-by: Josh Steadmon <steadmon@xxxxxxxxxx>
---
 contrib/cgit-rs/public_symbol_export.c | 27 ++++++++++++++++++++++++++
 contrib/cgit-rs/public_symbol_export.h |  8 ++++++++
 contrib/cgit-rs/src/lib.rs             | 13 ++++++++++++-
 contrib/cgit-rs/src/main.rs            | 23 +++++++++++++++++++++-
 4 files changed, 69 insertions(+), 2 deletions(-)

diff --git a/contrib/cgit-rs/public_symbol_export.c b/contrib/cgit-rs/public_symbol_export.c
index 3d1cd6cc4f..ab3401ac40 100644
--- a/contrib/cgit-rs/public_symbol_export.c
+++ b/contrib/cgit-rs/public_symbol_export.c
@@ -2,11 +2,35 @@
 // original symbols can be hidden. Renaming these with a "libgit_" prefix also
 // avoid conflicts with other libraries such as libgit2.
 
+#include "git-compat-util.h"
 #include "contrib/cgit-rs/public_symbol_export.h"
+#include "attr.h"
+#include "config.h"
+#include "setup.h"
 #include "version.h"
 
 #pragma GCC visibility push(default)
 
+const char *libgit_setup_git_directory(void)
+{
+	return setup_git_directory();
+}
+
+int libgit_config_get_int(const char *key, int *dest)
+{
+	return git_config_get_int(key, dest);
+}
+
+void libgit_initialize_the_repository(void)
+{
+	initialize_the_repository();
+}
+
+int libgit_parse_maybe_bool(const char *val)
+{
+	return git_parse_maybe_bool(val);
+}
+
 const char *libgit_user_agent(void)
 {
 	return git_user_agent();
@@ -17,4 +41,7 @@ const char *libgit_user_agent_sanitized(void)
 	return git_user_agent_sanitized();
 }
 
+const char *libgit_attr__true = git_attr__true;
+const char *libgit_attr__false = git_attr__false;
+
 #pragma GCC visibility pop
diff --git a/contrib/cgit-rs/public_symbol_export.h b/contrib/cgit-rs/public_symbol_export.h
index a3372f93fa..97e8e871ba 100644
--- a/contrib/cgit-rs/public_symbol_export.h
+++ b/contrib/cgit-rs/public_symbol_export.h
@@ -1,6 +1,14 @@
 #ifndef PUBLIC_SYMBOL_EXPORT_H
 #define PUBLIC_SYMBOL_EXPORT_H
 
+const char *libgit_setup_git_directory(void);
+
+int libgit_config_get_int(const char *key, int *dest);
+
+void libgit_initialize_the_repository(void);
+
+int libgit_parse_maybe_bool(const char *val);
+
 const char *libgit_user_agent(void);
 
 const char *libgit_user_agent_sanitized(void);
diff --git a/contrib/cgit-rs/src/lib.rs b/contrib/cgit-rs/src/lib.rs
index dc46e7ff42..df350e758f 100644
--- a/contrib/cgit-rs/src/lib.rs
+++ b/contrib/cgit-rs/src/lib.rs
@@ -1,6 +1,17 @@
-use libc::c_char;
+use libc::{c_char, c_int};
 
 extern "C" {
+    pub fn libgit_setup_git_directory() -> *const c_char;
+
+    // From config.c
+    pub fn libgit_config_get_int(key: *const c_char, dest: *mut c_int) ->c_int;
+
+    // From repository.c
+    pub fn libgit_initialize_the_repository();
+
+    // From parse.c
+    pub fn libgit_parse_maybe_bool(val: *const c_char) -> c_int;
+
     // From version.c
     pub fn libgit_user_agent() -> *const c_char;
     pub fn libgit_user_agent_sanitized() -> *const c_char;
diff --git a/contrib/cgit-rs/src/main.rs b/contrib/cgit-rs/src/main.rs
index 1794e3f43e..c5f8644fca 100644
--- a/contrib/cgit-rs/src/main.rs
+++ b/contrib/cgit-rs/src/main.rs
@@ -1,4 +1,4 @@
-use std::ffi::CStr;
+use std::ffi::{CStr, CString};
 
 fn main() {
     println!("Let's print some strings provided by Git");
@@ -7,4 +7,25 @@ fn main() {
     println!("git_user_agent() = {:?}", c_str);
     println!("git_user_agent_sanitized() = {:?}",
         unsafe { CStr::from_ptr(cgit::libgit_user_agent_sanitized()) });
+
+    println!("\nNow try passing args");
+    let test_arg = CString::new("test_arg").unwrap();
+    println!("git_parse_maybe_bool(...) = {:?}",
+        unsafe { cgit::libgit_parse_maybe_bool(test_arg.as_ptr()) });
+
+    println!("\nCan we get an int out of our config??");
+    unsafe {
+        cgit::libgit_initialize_the_repository();
+        cgit::libgit_setup_git_directory();
+        let mut val: libc::c_int = 0;
+        let key = CString::new("trace2.eventNesting").unwrap();
+        cgit::libgit_config_get_int(
+            key.as_ptr(),
+            &mut val as *mut i32
+        );
+        println!(
+            "git_config_get_int(\"trace2.eventNesting\") -> {:?}",
+            val
+        );
+    };
 }
-- 
2.46.0.rc2.264.g509ed76dc8-goog