mirror of
https://github.com/open-goal/jak-project.git
synced 2024-11-23 06:09:57 +00:00
c162c66118
This PR does two main things: 1. Work through the main low-hanging fruit issues in the formatter keeping it from feeling mature and usable 2. Iterate and prove that point by formatting all of the Jak 1 code base. **This has removed around 100K lines in total.** - The decompiler will now format it's results for jak 1 to keep things from drifting back to where they were. This is controlled by a new config flag `format_code`. How am I confident this hasn't broken anything?: - I compiled the entire project and stored it's `out/jak1/obj` files separately - I then recompiled the project after formatting and wrote a script that md5's each file and compares it (`compare-compilation-outputs.py` - The results (eventually) were the same:  > This proves that the only difference before and after is non-critical whitespace for all code/macros that is actually in use. I'm still aware of improvements that could be made to the formatter, as well as general optimization of it's performance. But in general these are for rare or non-critical situations in my opinion and I'll work through them before doing Jak 2. The vast majority looks great and is working properly at this point. Those known issues are the following if you are curious: 
511 lines
22 KiB
C++
511 lines
22 KiB
C++
#include "formatter.h"
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#include "formatter_tree.h"
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#include "common/formatter/rules/formatting_rules.h"
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#include "common/formatter/rules/rule_config.h"
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#include "common/log/log.h"
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#include "common/util/FileUtil.h"
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#include "common/util/ast_util.h"
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#include "common/util/string_util.h"
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#include "tree_sitter/api.h"
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#include "fmt/core.h"
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// Declare the `tree_sitter_opengoal` function, which is
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// implemented by the `tree-sitter-opengoal` library.
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extern "C" {
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extern const TSLanguage* tree_sitter_opengoal();
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}
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int hang_indentation_width(const FormatterTreeNode& curr_node) {
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if (curr_node.token || curr_node.refs.empty()) {
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return 0;
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}
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// Get the first element of the form
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const auto& first_elt = curr_node.refs.at(0);
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if (first_elt.token) {
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return first_elt.token->length() +
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2; // +2 because the opening paren and then the following space
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}
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// Otherwise, continue nesting
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return 1 + hang_indentation_width(first_elt);
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}
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int get_total_form_inlined_width(const FormatterTreeNode& curr_node) {
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if (curr_node.token) {
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return curr_node.token->length();
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}
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int width = 1;
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for (int i = 0; i < curr_node.refs.size(); i++) {
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width += get_total_form_inlined_width(curr_node.refs.at(i));
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if (i != curr_node.refs.size() - 1) {
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width += 1; // add the space between elements
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}
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}
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return width + 1;
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}
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// TODO - compute length of each node and store it AOT
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void apply_formatting_config(
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FormatterTreeNode& curr_node,
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std::optional<std::shared_ptr<formatter_rules::config::FormFormattingConfig>>
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config_from_parent = {},
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std::optional<std::shared_ptr<formatter_rules::config::FormFormattingConfig>>
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config_merge_from_parent = {}) {
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using namespace formatter_rules;
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// node is empty, base-case
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if (curr_node.token || curr_node.refs.empty()) {
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return;
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}
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// first, check to see if this form already has a predefined formatting configuration
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// if it does, that simplifies things because there is only 1 way of formatting the form
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std::optional<formatter_rules::config::FormFormattingConfig> predefined_config;
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if (!config_from_parent && !curr_node.refs.empty() && curr_node.refs.at(0).token) {
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const auto& form_head = curr_node.refs.at(0).token;
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if (form_head && config::opengoal_form_config.find(form_head.value()) !=
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config::opengoal_form_config.end()) {
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predefined_config = config::opengoal_form_config.at(form_head.value());
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curr_node.formatting_config = predefined_config.value();
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}
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if (config_merge_from_parent) {
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const auto& merge_config = *config_merge_from_parent.value();
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curr_node.formatting_config.parent_mutable_extra_indent +=
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merge_config.parent_mutable_extra_indent;
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curr_node.formatting_config.prevent_inlining = merge_config.prevent_inlining;
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}
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} else if (config_from_parent) {
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// TODO - doesn't merge just replaces, a bit inflexible
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predefined_config = *config_from_parent.value();
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curr_node.formatting_config = predefined_config.value();
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}
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// In order to keep things simple, as well as because its ineffectual in lisp code (you can only
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// enforce it so much without making things unreadable), line width will not matter for deciding
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// whether or not to hang or flow the form
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//
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// This means that a hang would ALWAYS win, because it's 1 less line break. Therefore this
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// simplifies our approach there is no need to explore both braches to see which one would be
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// preferred.
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//
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// Instead, we either use the predefined configuration (obviously) or we do some checks for some
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// outlier conditions to see if things should be formatted differently
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//
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// Otherwise, we always default to a hang.
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//
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// NOTE - any modifications here to child elements could be superseeded later in the recursion!
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// In order to maintain your sanity, only modify things here that _arent_ touched by default
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// configurations. These are explicitly prepended with `parent_mutable_`
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if (!predefined_config && !curr_node.formatting_config.config_set) {
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if (curr_node.metadata.is_top_level) {
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curr_node.formatting_config.indentation_width = 0;
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curr_node.formatting_config.hang_forms = false;
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} else if (constant_list::is_constant_list(curr_node)) {
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// - Check if the form is a constant list (ie. a list of numbers)
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curr_node.formatting_config.indentation_width = 1;
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curr_node.formatting_config.hang_forms = false;
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curr_node.formatting_config.has_constant_pairs =
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constant_pairs::form_should_be_constant_paired(curr_node);
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// If applicable, iterate through the constant pairs, since we can potentially pair up
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// non-constant second elements in a pair (like a function call), there is the potential that
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// they need to spill to the next line and get indented in extra. This is an exceptional
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// circumstance, we do NOT do this sort of thing when formatting normal forms (cond/case pairs
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// are another similar situation)
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if (curr_node.formatting_config.has_constant_pairs) {
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for (int i = 0; i < (int)curr_node.refs.size(); i++) {
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auto& child_ref = curr_node.refs.at(i);
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const auto& type = child_ref.metadata.node_type;
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if (constant_types.find(type) == constant_types.end() &&
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constant_pairs::is_element_second_in_constant_pair(curr_node, child_ref, i)) {
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child_ref.formatting_config.parent_mutable_extra_indent = 2;
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}
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}
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}
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} else if (curr_node.formatting_config.hang_forms && curr_node.refs.size() > 1 &&
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curr_node.refs.at(1).metadata.is_comment) {
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// - Check if the second argument is a comment, it looks better if we flow instead
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curr_node.formatting_config.hang_forms = false;
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}
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}
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// If we are hanging, lets determine the indentation width since it is based on the form itself
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if (curr_node.formatting_config.hang_forms) {
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// TODO - this isn't being calculated for a pre-defined config
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// TODO - another idea is to do this during consolidation
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curr_node.formatting_config.indentation_width = hang_indentation_width(curr_node);
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}
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// iterate through the refs
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for (int i = 0; i < (int)curr_node.refs.size(); i++) {
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auto& ref = curr_node.refs.at(i);
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if (!ref.token) {
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// If the child has a pre-defined configuration at that index, we pass it along
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if (predefined_config && predefined_config->index_config_override.find(i) !=
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predefined_config->index_config_override.end()) {
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apply_formatting_config(ref, {}, predefined_config->index_config_override.at(i));
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} else if (predefined_config && predefined_config->index_configs.find(i) !=
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predefined_config->index_configs.end()) {
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apply_formatting_config(ref, predefined_config->index_configs.at(i), {});
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} else if (predefined_config && predefined_config->default_index_config) {
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apply_formatting_config(ref, predefined_config->default_index_config, {});
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} else {
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apply_formatting_config(ref, {}, {});
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}
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}
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}
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// Precompute the column widths for things like deftype fields
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if (curr_node.formatting_config.determine_column_widths_for_list_elements) {
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// iterate through each ref and find the max length of each index (may be a token, may not be!)
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// then store that info in each list element's `list_element_column_widths` to be used when
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// printing out the tokens (pad width)
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// Find the maximum number of columns
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int max_columns = 0;
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for (const auto& field : curr_node.refs) {
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if ((int)field.refs.size() > max_columns) {
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max_columns = field.refs.size();
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}
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}
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// if only one field has a value in the max col position, it looks weird for it to be indented
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bool ignore_final_column_width = true;
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int fields_with_atleast_max_col = 0;
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for (const auto& field : curr_node.refs) {
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if ((int)field.refs.size() == max_columns) {
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fields_with_atleast_max_col++;
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if (fields_with_atleast_max_col > 1) {
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ignore_final_column_width = false;
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break;
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}
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}
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}
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// Now find the column max widths
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std::vector<int> column_max_widths = {};
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for (int col = 0; col < max_columns; col++) {
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column_max_widths.push_back(0);
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// -2 because its the indentation before the final column that we want to skip
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if (col >= curr_node.formatting_config.num_columns_to_compute_widths ||
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(ignore_final_column_width && col == max_columns - 2)) {
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continue;
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}
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for (const auto& field : curr_node.refs) {
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if ((int)field.refs.size() > col) {
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const auto width = get_total_form_inlined_width(field.refs.at(col));
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if (width > column_max_widths.at(col)) {
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column_max_widths[col] = width;
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}
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}
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}
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}
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// Apply column info to every list
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for (auto& field : curr_node.refs) {
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field.formatting_config.list_element_column_widths = column_max_widths;
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field.formatting_config.config_set = true;
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}
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}
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}
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bool form_contains_comment(const FormatterTreeNode& curr_node) {
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if (curr_node.metadata.is_comment) {
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return true;
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}
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for (const auto& ref : curr_node.refs) {
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const auto contains_comment = form_contains_comment(ref);
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if (contains_comment) {
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return true;
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}
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}
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return false;
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}
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bool form_contains_node_that_prevents_inlining(const FormatterTreeNode& curr_node) {
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if (curr_node.formatting_config.should_prevent_inlining(curr_node.formatting_config,
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curr_node.refs.size())) {
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return true;
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}
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for (const auto& ref : curr_node.refs) {
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const auto prevents_inlining = form_contains_node_that_prevents_inlining(ref);
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if (prevents_inlining) {
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return true;
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}
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}
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return false;
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}
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bool can_node_be_inlined(const FormatterTreeNode& curr_node, int cursor_pos) {
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using namespace formatter_rules;
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if (curr_node.formatting_config.force_inline) {
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// Ensure there are no comments, this still trumps this
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if (form_contains_comment(curr_node)) {
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return false;
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}
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return true;
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}
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// First off, we cannot inline the top level
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if (curr_node.metadata.is_top_level) {
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return false;
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}
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// If the config explicitly prevents inlining, or it contains a sub-node that prevents inlining
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if (curr_node.formatting_config.prevent_inlining ||
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form_contains_node_that_prevents_inlining(curr_node)) {
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return false;
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}
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// nor can we inline something that contains a comment in the middle
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if (form_contains_comment(curr_node)) {
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return false;
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}
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// constant pairs are not inlined!
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if (curr_node.formatting_config.has_constant_pairs) {
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return false;
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}
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// If this is set in the config, then the form is intended to be partially inlined
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if (curr_node.formatting_config.inline_until_index({})) {
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return false;
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}
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// let's see if we can inline the form all on one line to do that, we recursively explore
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// the form to find the total width
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int line_width = cursor_pos + get_total_form_inlined_width(curr_node);
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return line_width <= indent::line_width_target; // TODO - comments
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}
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std::vector<std::string> apply_formatting(const FormatterTreeNode& curr_node,
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std::vector<std::string> /*output*/ = {},
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int cursor_pos = 0) {
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using namespace formatter_rules;
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if (!curr_node.token && curr_node.refs.empty()) {
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// special case to handle an empty list
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if (curr_node.node_prefix) {
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return {fmt::format("{}()", curr_node.node_prefix.value())};
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}
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return {"()"};
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}
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// If its a token, just print the token and move on
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if (curr_node.token) {
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return {curr_node.token_str()};
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}
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bool inline_form = can_node_be_inlined(curr_node, cursor_pos);
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// TODO - also if the form is inlinable, we can skip all the complication below and just...inline
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// it!
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// TODO - should figure out the inlining here as well, instead of the bool above
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// Iterate the form, building up a list of the final lines but don't worry about indentation
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// at this stage. Once the lines are finalized, it's easy to add the indentation later
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//
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// This means we may combine elements onto the same line in this step.
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std::vector<std::string> form_lines = {};
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for (int i = 0; i < (int)curr_node.refs.size(); i++) {
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const auto& ref = curr_node.refs.at(i);
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// Add new line entry
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if (ref.token) {
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// Cleanup block-comments
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if (ref.metadata.node_type == "block_comment") {
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const auto comment_lines = comments::format_block_comment(ref.token_str());
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for (const auto& line : comment_lines) {
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form_lines.push_back(line);
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}
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} else {
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form_lines.push_back(ref.token_str());
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}
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if (!curr_node.metadata.is_top_level && i == (int)curr_node.refs.size() - 1 &&
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(ref.metadata.is_comment)) {
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// if there's an inline comment at the end of a form, we have to force the paren to the next
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// line and do a new-line paren this is ugly, but we have no choice!
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form_lines.push_back("");
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}
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} else {
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// If it's not a token, we have to recursively build up the form
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// TODO - add the cursor_pos here
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const auto& lines = apply_formatting(ref, {}, cursor_pos);
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for (int i = 0; i < (int)lines.size(); i++) {
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const auto& line = lines.at(i);
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form_lines.push_back(fmt::format(
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"{}{}", str_util::repeat(ref.formatting_config.parent_mutable_extra_indent, " "),
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line));
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}
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}
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// If we are hanging forms, combine the first two forms onto the same line
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if (i == (int)curr_node.refs.size() - 1 && form_lines.size() > 1 &&
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(curr_node.formatting_config.hang_forms ||
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curr_node.formatting_config.combine_first_two_lines)) {
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form_lines.at(0) += fmt::format(" {}", str_util::ltrim(form_lines.at(1)));
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form_lines.erase(form_lines.begin() + 1);
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} else if ((i + 1) < (int)curr_node.refs.size()) {
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const auto& next_ref = curr_node.refs.at(i + 1);
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// combine the next inline comment or constant pair
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if ((next_ref.metadata.node_type == "comment" && next_ref.metadata.is_inline) ||
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(curr_node.formatting_config.has_constant_pairs &&
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constant_pairs::is_element_second_in_constant_pair(curr_node, next_ref, i + 1)) ||
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constant_pairs::is_element_second_in_constant_pair_new(curr_node.refs.at(i), next_ref)) {
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// TODO
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// has issues with not consolidating first lines, this should probably just be moved to
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// outside this loop for simplicity, do it later
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if (next_ref.token) {
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form_lines.at(form_lines.size() - 1) += fmt::format(" {}", next_ref.token_str());
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i++;
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// We have to handle hang-consolidation here or else it will never be reached above!
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if (i == (int)curr_node.refs.size() - 1 && form_lines.size() > 1 &&
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(curr_node.formatting_config.hang_forms ||
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curr_node.formatting_config.combine_first_two_lines)) {
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form_lines.at(0) += fmt::format(" {}", form_lines.at(1));
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form_lines.erase(form_lines.begin() + 1);
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}
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} else if (can_node_be_inlined(next_ref, cursor_pos)) {
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const auto& lines = apply_formatting(next_ref, {}, cursor_pos); // TODO - cursor pos
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for (const auto& line : lines) {
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form_lines.at(form_lines.size() - 1) += fmt::format(" {}", line);
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}
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i++;
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// We have to handle hang-consolidation here or else it will never be reached above!
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if (i == (int)curr_node.refs.size() - 1 && form_lines.size() > 1 &&
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(curr_node.formatting_config.hang_forms ||
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curr_node.formatting_config.combine_first_two_lines)) {
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form_lines.at(0) += fmt::format(" {}", form_lines.at(1));
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form_lines.erase(form_lines.begin() + 1);
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}
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}
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if (!curr_node.metadata.is_top_level && next_ref.metadata.node_type == "comment" &&
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(i + 1) == (int)curr_node.refs.size()) {
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form_lines.push_back("");
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}
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}
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}
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// If we are at the top level, potential separate with a new line
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if (blank_lines::should_insert_blank_line(curr_node, ref, i)) {
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form_lines.at(form_lines.size() - 1) += "\n";
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}
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}
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// Consolidate any lines if the configuration requires it
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// TODO there is a hack here so that multi-line forms that are consolidated still line up properly
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// i have to make consolidate a more first-class feature of the config
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// TODO - hacky, but prevents a bad situation, clean up
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if (curr_node.formatting_config.inline_until_index(form_lines) &&
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!str_util::contains(form_lines.at(0), ";")) {
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std::vector<std::string> new_form_lines = {};
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const auto original_form_head_width = str_util::split(form_lines.at(0), '\n').at(0).length();
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bool consolidating_lines = true;
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for (int i = 0; i < (int)form_lines.size(); i++) {
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if (i < curr_node.formatting_config.inline_until_index(form_lines)) {
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if (new_form_lines.empty()) {
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new_form_lines.push_back(form_lines.at(i));
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} else {
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new_form_lines.at(0) += fmt::format(" {}", form_lines.at(i));
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}
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} else {
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if (str_util::starts_with(form_lines.at(i), " ") && consolidating_lines) {
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new_form_lines.push_back(fmt::format(
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"{}{}", str_util::repeat(original_form_head_width, " "), form_lines.at(i)));
|
|
} else {
|
|
consolidating_lines = false;
|
|
new_form_lines.push_back(form_lines.at(i));
|
|
}
|
|
}
|
|
}
|
|
form_lines = new_form_lines;
|
|
}
|
|
|
|
// Add any column padding
|
|
if (!curr_node.formatting_config.list_element_column_widths.empty()) {
|
|
for (int i = 0; i < (int)form_lines.size(); i++) {
|
|
const auto& token = form_lines.at(i);
|
|
if (i < (int)form_lines.size() - 1) {
|
|
form_lines[i] = str_util::pad_right(
|
|
token, curr_node.formatting_config.list_element_column_widths.at(i), ' ');
|
|
}
|
|
}
|
|
}
|
|
|
|
// Apply necessary indentation to each line and add parens
|
|
if (!curr_node.metadata.is_top_level) {
|
|
std::string form_surround_start = "(";
|
|
if (curr_node.node_prefix) {
|
|
form_surround_start = fmt::format("{}(", curr_node.node_prefix.value());
|
|
}
|
|
std::string form_surround_end = ")";
|
|
form_lines[0] = fmt::format("{}{}", form_surround_start, form_lines[0]);
|
|
form_lines[form_lines.size() - 1] =
|
|
fmt::format("{}{}", form_lines[form_lines.size() - 1], form_surround_end);
|
|
}
|
|
if (inline_form) {
|
|
// NOTE - not sure about this, if we are inlining a form, it always makes sense to eliminate
|
|
// trailing whitespace the only issue i can foresee is related to strings that span multiple
|
|
// lines.
|
|
std::vector<std::string> new_form_lines = {};
|
|
for (const auto& form_line : form_lines) {
|
|
new_form_lines.push_back(str_util::ltrim(form_line));
|
|
}
|
|
form_lines = {fmt::format("{}", fmt::join(new_form_lines, " "))};
|
|
} else {
|
|
bool currently_in_block_comment = false;
|
|
for (int i = 0; i < (int)form_lines.size(); i++) {
|
|
auto& line = form_lines.at(i);
|
|
if (str_util::contains(line, "|#")) {
|
|
currently_in_block_comment = false;
|
|
}
|
|
if (i > 0 && !currently_in_block_comment) {
|
|
line = fmt::format("{}{}",
|
|
str_util::repeat(curr_node.formatting_config.indentation_width_for_index(
|
|
curr_node.formatting_config, i),
|
|
" "),
|
|
line);
|
|
}
|
|
if (str_util::contains(line, "#|") && !str_util::contains(line, "|#")) {
|
|
currently_in_block_comment = true;
|
|
}
|
|
}
|
|
}
|
|
return form_lines;
|
|
}
|
|
|
|
std::string join_formatted_lines(const std::vector<std::string>& lines,
|
|
const std::string& line_ending) {
|
|
return fmt::format("{}", fmt::join(lines, line_ending));
|
|
}
|
|
|
|
std::optional<std::string> formatter::format_code(const std::string& source) {
|
|
// Create a parser.
|
|
std::shared_ptr<TSParser> parser(ts_parser_new(), TreeSitterParserDeleter());
|
|
ts_parser_set_language(parser.get(), tree_sitter_opengoal());
|
|
|
|
// Build a syntax tree based on source code stored in a string.
|
|
std::shared_ptr<TSTree> tree(
|
|
ts_parser_parse_string(parser.get(), NULL, source.c_str(), source.length()),
|
|
TreeSitterTreeDeleter());
|
|
|
|
// Get the root node of the syntax tree.
|
|
TSNode root_node = ts_tree_root_node(tree.get());
|
|
if (ts_node_is_null(root_node)) {
|
|
lg::error("null root node");
|
|
return std::nullopt;
|
|
} else if (ts_node_has_error(root_node)) {
|
|
lg::error("grammar parsing error, go figure it out!");
|
|
return std::nullopt;
|
|
}
|
|
|
|
try {
|
|
// There are three phases of formatting
|
|
// 1. Simplify the AST down to something that is easier to work on from a formatting perspective
|
|
// this also gathers basic metadata that can be done at this stage, like if the token is a
|
|
// comment or if the form is on the top-level
|
|
auto formatting_tree = FormatterTree(source, root_node);
|
|
// 2. Recursively iterate through this simplified FormatterTree and figure out what rules
|
|
// need to be applied to produce an optimal result
|
|
apply_formatting_config(formatting_tree.root);
|
|
// 3. Use this updated FormatterTree to print out the final source-code, while doing so
|
|
// we may deviate from the optimal result to produce something even more optimal by inlining
|
|
// forms that can fit within the line width.
|
|
const auto formatted_lines = apply_formatting(formatting_tree.root);
|
|
// 4. Now we joint he lines together, it's easier when formatting to leave all lines independent
|
|
// so adding indentation is easier
|
|
const auto formatted_source =
|
|
join_formatted_lines(formatted_lines, file_util::get_majority_file_line_endings(source));
|
|
return formatted_source;
|
|
} catch (std::exception& e) {
|
|
lg::error("Unable to format code - {}", e.what());
|
|
}
|
|
|
|
return std::nullopt;
|
|
}
|