Wrap libgit2 dev

Readme.md

@@ -16,13 +16,14 @@ Tested on Linux and Windows 64 bits.
 
 ## Examples 
 
-* [Git Init](./examples/init): 		`shows how to initialize a new repo`
-* [Git Status](./examples/status):	`shows how to use the status APIs` 
+* [Git Init](./examples/init) 		`shows how to initialize a new repo`
+* [Git Status](./examples/status)	`shows how to use the status APIs` 
 * [Git Add](./examples/add)		`shows how to modify the index`
 * [Git Checkout](./examples/checkout)	`shows how to perform checkouts`.
 * [Git Describe](./examples/describe)	`shows how to describe commits`.
 * [Git ls-files](./examples/ls_files)	`shows how to view all files currently in the index.`
-* [Git push](./examples/push)		`shows how to git push <remote> <branch>`.
+* [Git push](./examples/push)		`shows how to git push <remote> <branch>`
+* [Git ls_remote](./examples/ls_remote)	`shows how to list remote references.`
 
 [Guide to linking libgit2](https://libgit2.org/docs/guides/build-and-link/) on various platforms
 

examples/ls_remote/application.e

@@ -0,0 +1,279 @@
+note
+	description: "[
+			libgit2 "ls_remote" example - shows how to list remote references
+		]"
+
+class APPLICATION
+
+inherit
+
+	COMMAND_LINE_PARSER
+		rename
+			make as make_command_line_parser
+		end
+
+create
+	make
+
+feature {NONE} --Initialization
+
+	make
+
+		do
+			create git_repository
+			path := "."
+			remote := ""
+
+			make_command_line_parser
+			process_arguments
+			show_remote
+		end
+
+
+feature -- Intiialize Repository
+
+	show_remote
+		local
+			ini: INTEGER
+			repo: GIT_REPOSITORY_STRUCT_API
+			iniopts: GIT_REPOSITORY_INIT_OPTIONS_STRUCT_API
+			l_remote: GIT_REMOTE_STRUCT_API
+			git_remote: GIT_REMOTE
+			refspec: STRING
+			l_options: GIT_PUSH_OPTIONS_STRUCT_API
+			a_array: GIT_STRARRAY_STRUCT_API
+			callbacks: GIT_REMOTE_CALLBACKS_STRUCT_API
+			callback_dispatcher: GIT_CRED_ACQUIRE_CB_DISPATCHER
+			refs: ARRAYED_LIST [GIT_REMOTE_HEAD_STRUCT_API]
+			ref_len: INTEGER
+			git_oid: GIT_OID
+			oid: STRING
+
+		do
+			ini := {LIBGIT2_INITIALIZER_API}.git_libgit2_init
+			print ("%NIntializing Libgit2")
+			create repo.make
+
+			if git_repository.git_repository_open (repo, (create {PATH}.make_from_string (path)).out) < 0 then
+				print ("%NCould not open repository")
+				{EXCEPTIONS}.die (1)
+			end
+
+				-- get the remote
+			create l_remote.make
+
+			create git_remote
+			if git_remote.git_remote_lookup (l_remote, repo, remote) < 0 then
+				if git_remote.git_remote_create_anonymous (l_remote, repo, remote) < 0 then
+					print ("%NCould not get remote repository " + remote)
+					{EXCEPTIONS}.die (1)
+				end
+			end
+
+			create callbacks.make
+			if git_remote.git_remote_init_callbacks (callbacks, 1) < 0 then
+				print ("%NCould not intialize callback ")
+				{EXCEPTIONS}.die (1)
+			end
+
+			create callback_dispatcher.make (agent cred_acquire_cb )
+			callbacks.set_credentials (callback_dispatcher.c_dispatcher)
+
+				-- connect to remote
+			if git_remote.git_remote_connect (l_remote, {GIT_DIRECTION_ENUM_API}.git_direction_fetch, callbacks, Void, Void) < 0 then
+				print ("%NCould not connect to remote repository " + remote)
+				{EXCEPTIONS}.die (1)
+			end
+
+			create refs.make (1)
+				-- Get the list of references on the remote and print out
+				-- their name next to what they point to.
+
+			if git_remote.git_remote_ls (refs, l_remote) < 0 then
+				print ("%NCould not get the remote repository's reference advertisement list")
+				{EXCEPTIONS}.die (1)
+			end
+
+			create git_oid
+			from
+				refs.start
+			until
+				refs.after
+			loop
+				create oid.make ({LIBGIT2_CONSTANTS}.GIT_OID_HEXSZ + 1)
+				if attached refs.item_for_iteration.oid as l_oid then
+					git_oid.git_oid_fmt (oid, l_oid)
+					if attached refs.item_for_iteration.name as l_name then
+						print("%N" + oid.substring (1, {LIBGIT2_CONSTANTS}.GIT_OID_HEXSZ) +"%T" + l_name )
+					else
+						print("%N" + oid +"%T")
+					end
+				end
+				refs.forth
+
+			end
+			git_repository.git_repository_free (repo)
+			git_remote.git_remote_free (l_remote)
+			ini := {LIBGIT2_INITIALIZER_API}.git_libgit2_shutdown
+			io.read_line
+		end
+
+	init_array (a_array: GIT_STRARRAY_STRUCT_API; l_array: ARRAY [STRING])
+		local
+			mp: MANAGED_POINTER
+		do
+			create mp.make (l_array.count * {PLATFORM}.pointer_bytes)
+			across l_array as ic  loop
+				mp.put_pointer ((create {C_STRING}.make (ic.item)).item, (ic.cursor_index - 1) * {PLATFORM}.pointer_bytes )
+			end
+			a_array.set_count (l_array.count)
+			a_array.set_strings (mp.item)
+		end
+
+	cred_acquire_cb (a_cred: POINTER; a_url: POINTER; a_username_from_url: POINTER; a_allowed_types: INTEGER; a_payload: POINTER): INTEGER
+		local
+			l_user_name: STRING
+			exit: BOOLEAN
+			cred: GIT_CRED_STRUCT_API
+			git_cred: GIT_CREDENTIALS_API
+			l_password: STRING
+			l_privkey: STRING
+			l_pubkey: STRING
+		do
+
+			if a_username_from_url /= default_pointer then
+				l_user_name := (create {C_STRING}.make_by_pointer (a_username_from_url)).string
+				exit := l_user_name.is_empty
+			else
+				print ("%NUsername:")
+				io.read_line
+				l_user_name := io.last_string.twin
+				exit := l_user_name.is_empty
+			end
+
+			if not exit and then a_allowed_types & {GIT_CREDTYPE_T_ENUM_API}.GIT_CREDTYPE_SSH_KEY > 0 then
+				print ("%NSSH key:")
+				io.read_line
+				l_privkey := io.last_string.twin
+				print ("%NPassword:")
+				l_password := read_password
+				if l_password.is_empty or l_privkey.is_empty then
+					exit := True
+				end
+				create l_pubkey.make_from_string (l_password)
+				l_pubkey.append_string (".pub")
+				create git_cred
+				create cred.make_by_pointer (a_cred)
+				Result := git_cred.git_cred_ssh_key_new(cred, l_user_name, l_pubkey, l_privkey, l_password)
+			elseif not exit and then a_allowed_types & {GIT_CREDTYPE_T_ENUM_API}.GIT_CREDTYPE_USERPASS_PLAINTEXT > 0 then
+				print ("%NPassword:")
+				l_password := read_password
+				exit := l_password.is_empty
+				if not exit then
+					create git_cred
+					create cred.make_by_pointer (a_cred)
+					Result := git_cred.git_cred_userpass_plaintext_new(cred, l_user_name, l_password)
+				end
+			else
+				if not exit then
+					create git_cred
+					create cred.make_by_pointer (a_cred)
+					Result := git_cred.git_cred_username_new (cred, l_user_name)
+				end
+			end
+
+		end
+
+feature	{NONE} -- Process Arguments
+
+	process_arguments
+			-- Process command line arguments
+		local
+			shared_value: STRING
+		do
+			if match_long_option ("git-dir") then
+				if is_next_option_long_option and then has_next_option_value then
+					create path.make_from_string (next_option_value)
+					consume_option
+				else
+					print("%N Missing command line parameter --git-dir=<dir>")
+					usage
+					{EXCEPTIONS}.die (1)
+				end
+			end
+			if  has_next_option and then not is_next_option_long_option then
+				create remote.make_from_string (next_option)
+				consume_option
+			else
+				print("%N Missing command line parameter <remote>%N")
+				usage
+				{EXCEPTIONS}.die (1)
+			end
+		end
+
+	usage
+		local
+			str: STRING
+		do
+			str := "[
+				lxs [--git-dir=<directory>]
+				<remote>
+				]"
+
+			print("%N")
+			print (str)
+		end
+
+	read_password: STRING
+		local
+			l_ptr: POINTER
+		do
+		 	l_ptr := c_read_password
+		 	if l_ptr /= default_pointer then
+		 		Result := (create {C_STRING}.make_by_pointer (l_ptr)).string
+		 	else
+		 		Result := ""
+		 	end
+		end
+
+	c_read_password: POINTER
+		external "C inline"
+		alias
+			"[
+				#define ENTER 13
+				#define TAB 9
+				#define BKSP 8
+
+				char* pwd;
+
+				int i = 0;
+				char ch;
+
+				while(1){
+					ch = getch();	//get key
+
+					if(ch == ENTER || ch == TAB){
+						pwd[i] = '\0';
+						break;
+					}else if(ch == BKSP){
+						if(i > 0){
+							i--;
+							printf("\b \b");		//for backspace
+						}
+					}else{
+						pwd[i++] = ch;
+						printf("* \b");				//to replace password character with *
+					}
+				}//while ends here
+
+				return pwd;
+			]"
+		end
+
+feature -- Options
+
+	path: STRING
+	remote: STRING
+	git_repository: LIBGIT2_REPOSITORY
+
+end