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Initial Import wrap_libgit2 library
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‎.gitattributes‎

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* linguist-vendored
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*.e linguist-vendored=false

‎.gitignore‎

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EIFGENs
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*.swp
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*.rc
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‎Readme.md‎

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# Wrap_libgit2
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`Wrap_libgit2` is an Eiffel binding of [libgit2](https://libgit2.org/) C library
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using [WrapC](https://github.com/eiffel-wrap-c/WrapC) tool.
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`libgit2` is a portable, pure C implementation of the Git core methods provided as a re-entrant linkable library with a solid API,
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allowing you to write native speed custom Git applications in any language which supports C bindings.
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## Requirements
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* [WrapC](https://github.com/eiffel-wrap-c/WrapC) tool.
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* [Libgit2 v0.28.3](https://github.com/libgit2/libgit2/releases).
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== Status ==
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The binding is work in progress.
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Tested on Linux and Windows 64 bits.
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## Examples
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* Git Init: `shows how to initialize a new repo`
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* Git Status: `shows how to use the status APIs`
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[Guide to linking libgit2](https://libgit2.org/docs/guides/build-and-link/) on various platforms
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On Linux to install version 0.28.3 you will need to do the following.
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$ mkdir build
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$ cd build
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$ cmake ..
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$ sudo cmake --build . --target install
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Optionally you can use [vckpg](https://github.com/Microsoft/vcpkg), a C++ Library Manager for Windows, Linux, and MacOS.
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Windows example
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```
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vcpkg install libgit2:x64-windows
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```
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or
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Linux example
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```
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./vcpkg install libgit2:x64-linux
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```
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‎examples/add/add.ecf‎

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<?xml version="1.0" encoding="ISO-8859-1"?>
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<system xmlns="http://www.eiffel.com/developers/xml/configuration-1-21-0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.eiffel.com/developers/xml/configuration-1-21-0 http://www.eiffel.com/developers/xml/configuration-1-21-0.xsd" name="add">
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<target name="add">
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<root class="APPLICATION" feature="make"/>
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<file_rule>
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<exclude>/CVS$</exclude>
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<exclude>/EIFGENs$</exclude>
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<exclude>/\.git$</exclude>
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<exclude>/\.svn$</exclude>
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</file_rule>
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<option warning="warning" manifest_array_type="mismatch_warning">
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<assertions precondition="true" postcondition="true" check="true" invariant="true" loop="true" supplier_precondition="true"/>
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</option>
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<setting name="console_application" value="true"/>
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<setting name="dead_code_removal" value="feature"/>
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<library name="base" location="$ISE_LIBRARY\library\base\base.ecf"/>
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<library name="libgit2" location="..\..\library\libgit2.ecf" readonly="false"/>
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<cluster name="add" location=".\" recursive="true"/>
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</target>
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</system>

‎examples/add/application.e‎

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note
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description: "[
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libgit2 "add" example - shows how to modify the index
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]"
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EIS: "name=git add", "src=https://github.com/libgit2/libgit2/blob/master/examples/add.c","protocol=uri"
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class APPLICATION
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inherit
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COMMAND_LINE_PARSER
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rename
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make as make_command_line_parser
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end
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create
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make
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feature {NONE} --Initialization
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make
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do
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create git_repository
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create path.make_from_string (".")
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create files.make (1)
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make_command_line_parser
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process_arguments
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add
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end
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feature -- Repository
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add
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local
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ini: INTEGER
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index: GIT_INDEX_STRUCT_API
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array: GIT_STRARRAY_STRUCT_API
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count: INTEGER
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payload: PAYLOAD
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matched_cb: GIT_INDEX_MATCHED_PATH_CB_DISPATCHER
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repo: GIT_REPOSITORY_STRUCT_API
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git_index: GIT_INDEX_API
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callback: POINTER
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do
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ini := {LIBGIT2_INITIALIZER_API}.git_libgit2_init
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print ("%NIntializing Libgit2%N")
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create index.make
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create array.make
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create payload
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create repo.make
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if git_repository.git_repository_open (repo, (create {PATH}.make_from_string (path)).out) < 0 then
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print ("%NCould not open repository")
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{EXCEPTIONS}.die (1)
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end
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if git_repository.git_repository_index (index, repo) < 0 then
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print ("%NCould not open repository index")
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{EXCEPTIONS}.die (1)
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end
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init_array (array)
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-- git_array_to_eiffel_array (array)
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-- Setup a callback if the requested options need it.
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if ((options & VERBOSE) /= 0 ) or ((options & SKIP) /= 0) then
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create matched_cb.make (agent print_matched_cb)
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end
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-- Perform the requested action with the index and files.
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payload.set_options (options)
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payload.set_repository (repo)
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callback := if attached matched_cb as l_matched_cb then l_matched_cb.c_dispatcher else default_pointer end
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create git_index
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if (options & UPDATE) /= 0 then
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ini := git_index.git_index_update_all (index, array, callback, serialize (payload))
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else
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ini := git_index.git_index_add_all (index, array, 0, callback, serialize (payload))
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end
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-- Clenup memory
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ini := git_index.git_index_write (index)
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git_index.git_index_free (index)
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end
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print_matched_cb (a_path: POINTER; a_matched_pathspec: POINTER; a_payload: POINTER): INTEGER
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-- This callback is called for each file under consideration by
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-- git_index_(update|add)_all above.
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-- It makes uses of the callback's ability to abort the action.
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local
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l_payload: PAYLOAD
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ret: INTEGER
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status: INTEGER
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git_status: GIT_STATUS
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repo: GIT_REPOSITORY_STRUCT_API
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do
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create git_status
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l_payload := deserialize (a_payload)
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if attached l_payload then
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repo := if attached l_payload.repo as l_repo then l_repo else create {GIT_REPOSITORY_STRUCT_API}.make end
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else
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create repo.make
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end
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-- Get the file status
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if git_status.git_status_file ($status, repo, (create {C_STRING}.make_by_pointer (a_path)).string) < 0 then
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Result := -1
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end
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if ((( status & {GIT_STATUS_T_ENUM_API}.GIT_STATUS_WT_MODIFIED )/= 0 ) or ( status & ({GIT_STATUS_T_ENUM_API}.GIT_STATUS_WT_NEW) /= 0 )) and (Result /= -1) then
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print ("add " + (create {C_STRING}.make_by_pointer (a_path)).string )
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Result := 0
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else
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Result := 1
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end
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if attached l_payload and then (l_payload.options & SKIP) /= 0 then
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Result := 1
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end
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end
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feature {NONE} -- Process Arguments
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process_arguments
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-- Process command line arguments
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local
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shared_value: STRING
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do
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if match_long_option ("git-dir") then
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if is_next_option_long_option and then has_next_option_value then
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create path.make_from_string (next_option_value)
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consume_option
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else
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print("%N Missing command line parameter --git-dir=<dir>")
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usage
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{EXCEPTIONS}.die (1)
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end
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end
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if match_long_option ("dry-run") then
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options := options | SKIP
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consume_option
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end
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if match_long_option ("verbose") then
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options := options | VERBOSE
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consume_option
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end
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if match_long_option ("update") then
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options := options | UPDATE
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consume_option
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end
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from
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if has_next_option and then not is_next_option_long_option then
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files.force (next_option)
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consume_option
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else
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print("%N Missing command line parameter <file>%N")
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usage
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{EXCEPTIONS}.die (1)
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end
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until
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not has_next_option
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loop
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if has_next_option and then not is_next_option_long_option then
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files.force (next_option)
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consume_option
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else
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print ("%NUnexpected parameter%N")
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usage
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{EXCEPTIONS}.die (1)
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end
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end
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end
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usage
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local
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str: STRING
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do
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str := "[
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git_add [--git-dir] [options] file [file]
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[--git-dir]: use the following git repository.
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[--dry-run]: dry-run
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[--verbose]: be verbose
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[--update]: update tracked files
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<files>
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]"
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print("%N")
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print (str)
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end
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init_array (a_array: GIT_STRARRAY_STRUCT_API)
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local
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l_array: ARRAY [STRING]
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mp: MANAGED_POINTER
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do
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l_array := files.to_array
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create mp.make (l_array.count * {PLATFORM}.pointer_bytes)
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across l_array as ic loop
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mp.put_pointer ((create {C_STRING}.make (ic.item)).item, (ic.cursor_index - 1) * {PLATFORM}.pointer_bytes )
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end
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a_array.set_count (l_array.count)
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a_array.set_strings (mp.item)
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end
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git_array_to_eiffel_array (a_array: GIT_STRARRAY_STRUCT_API)
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local
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mp: MANAGED_POINTER
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l_arr: ARRAY [STRING]
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i: INTEGER
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do
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create mp.make_from_pointer (a_array.strings, a_array.count * {PLATFORM}.pointer_bytes)
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create l_arr.make_filled ("", 1, a_array.count)
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from
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until
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i = a_array.count
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loop
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l_arr.put ((create {C_STRING}.make_by_pointer (mp.read_pointer (i*{PLATFORM}.pointer_bytes))).string, i + 1)
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i := i + 1
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end
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end
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deserialize (a_pointer: POINTER): PAYLOAD
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local
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mp: MANAGED_POINTER
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do
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create mp.make_from_pointer (a_pointer, {PLATFORM}.integer_32_bytes + {PLATFORM}.pointer_bytes)
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create Result
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Result.set_options (mp.read_integer_32 (0))
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Result.set_repository (create {GIT_REPOSITORY_STRUCT_API}.make_by_pointer (mp.read_pointer ({PLATFORM}.integer_32_bytes)))
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end
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serialize (a_payload: PAYLOAD): POINTER
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local
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l_ptr: MANAGED_POINTER
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do
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create l_ptr.make ({PLATFORM}.integer_32_bytes + {PLATFORM}.pointer_bytes)
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l_ptr.put_integer_32 (a_payload.options, 0)
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l_ptr.put_pointer (a_payload.pointer, {PLATFORM}.integer_32_bytes)
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Result := l_ptr.item
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end
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feature -- Options
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git_repository: LIBGIT2_REPOSITORY
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path: STRING
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files: ARRAYED_LIST [STRING]
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options: INTEGER
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SKIP: INTEGER = 1
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VERBOSE: INTEGER = 2
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UPDATE: INTEGER = 4
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end

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