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2019-11-18built-in add -i: implement the `help` commandLibravatar Slavica Đukić1-0/+21
This imitates the code to show the help text from the Perl script `git-add--interactive.perl` in the built-in version. To make sure that it renders exactly like the Perl version of `git add -i`, we also add a test case for that to `t3701-add-interactive.sh`. Signed-off-by: Slavica Đukić <slawica92@hotmail.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-11-18built-in add -i: use color in the main loopLibravatar Slavica Đukić1-6/+29
The error messages as well as the unique prefixes are colored in `git add -i` by default; We need to do the same in the built-in version. Signed-off-by: Slavica Đukić <slawica92@hotmail.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-11-18built-in add -i: support `?` (prompt help)Libravatar Johannes Schindelin1-1/+21
With this change, we print out the same colored help text that the Perl-based `git add -i` prints in the main loop when question mark is entered. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-11-18built-in add -i: show unique prefixes of the commandsLibravatar Johannes Schindelin1-11/+177
Just like in the Perl script `git-add--interactive.perl`, for each command a unique prefix is determined (if there exists any within the given parameters), and shown in the list, and accepted as a shortcut for the command. To determine the unique prefixes, as well as to look up the command in question, we use a copy of the list and sort it. While this might seem like overkill for a single command, it will make much more sense when all the commands are implemented, and when we reuse the same logic to present a list of files to edit, with convenient unique prefixes. At the start of the development of this patch series, a dedicated data structure was introduced that imitated the Trie that the Perl version implements. However, this was deemed overkill, and we now simply sort the list before determining the length of the unique prefixes by looking at each item's neighbor. As a bonus, we now use the same sorted list to perform a binary search using the user-provided prefix as search key. Original-patch-by: Slavica Đukić <slawica92@hotmail.com> Helped-by: SZEDER Gábor <szeder.dev@gmail.com> Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-11-18built-in add -i: implement the main loopLibravatar Johannes Schindelin1-2/+135
The reason why we did not start with the main loop to begin with is that it is the first user of `list_and_choose()`, which uses the `list()` function that we conveniently introduced for use by the `status` command. In contrast to the Perl version, in the built-in interactive `add`, we will keep the `list()` function (which only displays items) and the `list_and_choose()` function (which uses `list()` to display the items, and only takes care of the "and choose" part) separate. The `list_and_choose()` function, as implemented in `git-add--interactive.perl` knows a few more tricks than the function we introduce in this patch: - There is a flag to let the user select multiple items. - In multi-select mode, the list of items is prefixed with a marker indicating what items have been selected. - Initially, for each item a unique prefix is determined (if there exists any within the given parameters), and shown in the list, and accepted as a shortcut for the selection. These features will be implemented in the C version later. This patch does not add any new main loop command, of course, the built-in `git add -i` still only supports the `status` command. The remaining commands to follow over the course of the next commits. To accommodate for listing the commands in columns, preparing for the commands that will be implemented over the course of the next patches/patch series, we teach the `list()` function to do precisely that. Note that we only have a prompt ending in a single ">" at this stage; later commits will add commands that display a double ">>" to indicate that the user is in a different loop than the main one. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-11-14built-in add -i: color the header in the `status` commandLibravatar Slavica Đukić1-4/+37
For simplicity, we only implemented the `status` command without colors. This patch starts adding color, matching what the Perl script `git-add--interactive.perl` does. Original-Patch-By: Daniel Ferreira <bnmvco@gmail.com> Signed-off-by: Slavica Đukić <slawica92@hotmail.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-11-14built-in add -i: implement the `status` commandLibravatar Daniel Ferreira1-1/+250
This implements the `status` command of `git add -i`. The data structures introduced in this commit will be extended later, as needed. At this point, we re-implement only part of the `list_and_choose()` function of the Perl script `git-add--interactive.perl` and call it `list()`. It does not yet color anything, or do columns, or allow user input. Over the course of the next commits, we will introduce a `list_and_choose()` function that uses `list()` to display the list of options and let the user choose one or more of the displayed items. This will be used to implement the main loop of the built-in `git add -i`, at which point the new `status` command can actually be used. Signed-off-by: Daniel Ferreira <bnmvco@gmail.com> Signed-off-by: Slavica Đukić <slawica92@hotmail.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-11-14Start to implement a built-in version of `git add --interactive`Libravatar Johannes Schindelin1-0/+7
Unlike previous conversions to C, where we started with a built-in helper, we start this conversion by adding an interception in the `run_add_interactive()` function when the new opt-in `add.interactive.useBuiltin` config knob is turned on (or the corresponding environment variable `GIT_TEST_ADD_I_USE_BUILTIN`), and calling the new internal API function `run_add_i()` that is implemented directly in libgit.a. At this point, the built-in version of `git add -i` only states that it cannot do anything yet. In subsequent patches/patch series, the `run_add_i()` function will gain more and more functionality, until it is feature complete. The whole arc of the conversion can be found in the PRs #170-175 at https://github.com/gitgitgadget/git. The "--helper approach" can unfortunately not be used here: on Windows we face the very specific problem that a `system()` call in Perl seems to close `stdin` in the parent process when the spawned process consumes even one character from `stdin`. Which prevents us from implementing the main loop in C and still trying to hand off to the Perl script. The very real downside of the approach we have to take here is that the test suite won't pass with `GIT_TEST_ADD_I_USE_BUILTIN=true` until the conversion is complete (the `--helper` approach would have let it pass, even at each of the incremental conversion steps). Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>