lang: Allow references to the program ID in doctests

Author: jamie-osec

lang/attribute/account/src/lib.rs

@@ -133,7 +133,11 @@ pub fn account(
                 #[automatically_derived]
                 impl #impl_gen anchor_lang::Owner for #account_name #type_gen #where_clause {
                     fn owner() -> Pubkey {
-                        crate::ID
+                        // In a doctest the ID will be in the current scope, not the crate root
+                        #[cfg(not(doctest))]
+                        { crate::ID }
+                        #[cfg(doctest)]
+                        { ID }
                     }
                 }
             }

lang/attribute/event/src/lib.rs

@@ -174,7 +174,11 @@ pub fn emit_cpi(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
                 .collect();
 
             let ix = anchor_lang::solana_program::instruction::Instruction::new_with_bytes(
-                crate::ID,
+                // In a doctest the ID will be in the current scope, not the crate root
+                #[cfg(not(doctest))]
+                { crate::ID },
+                #[cfg(doctest)]
+                { ID },
                 &ix_data,
                 vec![
                     anchor_lang::solana_program::instruction::AccountMeta::new_readonly(

lang/syn/src/codegen/accounts/mod.rs

@@ -21,8 +21,16 @@ pub fn generate(accs: &AccountsStruct) -> proc_macro2::TokenStream {
     let impl_exit = exit::generate(accs);
     let bumps_struct = bumps::generate(accs);
 
-    let __client_accounts_mod = __client_accounts::generate(accs, quote!(crate::ID));
-    let __cpi_client_accounts_mod = __cpi_client_accounts::generate(accs, quote!(crate::ID));
+    let program_id = quote! {
+        // In a doctest the ID will be in the current scope, not the crate root
+        #[cfg(not(doctest))]
+        { crate::ID }
+        #[cfg(doctest)]
+        { ID }
+    };
+
+    let __client_accounts_mod = __client_accounts::generate(accs, program_id.clone());
+    let __cpi_client_accounts_mod = __cpi_client_accounts::generate(accs, program_id);
 
     let ret = quote! {
         #impl_try_accounts

lang/syn/src/codegen/program/idl.rs

@@ -29,7 +29,11 @@ pub fn idl_accounts_and_functions() -> proc_macro2::TokenStream {
         // works. Namespaces are the root of most of the problem.
         impl anchor_lang::Owner for IdlAccount {
             fn owner() -> Pubkey {
-                crate::ID
+                // In a doctest the ID will be in the current scope, not the crate root
+                #[cfg(not(doctest))]
+                { crate::ID }
+                #[cfg(doctest)]
+                { ID }
             }
         }