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https://github.com/tstack/lnav.git
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[prql] add more online help
This commit is contained in:
parent
8d70397005
commit
6d2d414e97
@ -258,7 +258,7 @@ copyright = u'2023, Tim Stack'
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# The short X.Y version.
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version = '0.12'
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# The full version, including alpha/beta/rc tags.
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release = '0.12.0'
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release = '0.12.1'
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# The language for content autogenerated by Sphinx. Refer to documentation
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# for a list of supported languages.
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@ -95,7 +95,7 @@ release: osx-package musl-package release-NEWS.md
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push:
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env LANG=UTF-8 package_cloud push tstack/lnav/ubuntu/lucid outbox/lnav*.deb
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env LANG=UTF-8 package_cloud push tstack/lnav/el/5 outbox/lnav-0.12.0-1.x86_64.rpm
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env LANG=UTF-8 package_cloud push tstack/lnav/el/5 outbox/lnav-0.12.1-1.x86_64.rpm
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clean:
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cd vagrant-static && vagrant destroy -f
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@ -45,6 +45,7 @@ enum class help_context_t {
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HC_SQL_FUNCTION,
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HC_SQL_TABLE_VALUED_FUNCTION,
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HC_PRQL_TRANSFORM,
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HC_PRQL_FUNCTION,
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};
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enum class help_function_type_t {
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@ -97,6 +98,7 @@ struct help_text {
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std::vector<const char*> ht_opposites;
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help_function_type_t ht_function_type{help_function_type_t::HFT_REGULAR};
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std::vector<const char*> ht_prql_path;
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const char* ht_default_value{nullptr};
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void* ht_impl{nullptr};
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help_text() = default;
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@ -159,6 +161,12 @@ struct help_text {
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return *this;
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}
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help_text& prql_function() noexcept
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{
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this->ht_context = help_context_t::HC_PRQL_FUNCTION;
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return *this;
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}
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help_text& with_summary(const char* summary) noexcept
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{
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this->ht_summary = summary;
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@ -191,6 +199,12 @@ struct help_text {
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help_text& with_example(const help_example& example) noexcept;
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help_text& with_default_value(const char* defval)
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{
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this->ht_default_value = defval;
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return *this;
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}
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help_text& optional() noexcept
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{
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this->ht_nargs = help_nargs_t::HN_OPTIONAL;
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@ -357,12 +357,55 @@ format_help_text_for_term(const help_text& ht,
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for (const auto& param : ht.ht_parameters) {
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out.append(" ");
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if (param.ht_nargs == help_nargs_t::HN_OPTIONAL) {
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out.append("[");
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out.append(lnav::roles::symbol(param.ht_name));
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out.append(":");
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if (param.ht_default_value) {
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out.append(param.ht_default_value);
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} else {
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out.append("null");
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}
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} else {
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if (param.ht_group_start) {
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out.append(param.ht_group_start);
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}
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out.append(lnav::roles::variable(param.ht_name));
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}
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out.append(lnav::roles::variable(param.ht_name));
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if (param.ht_nargs == help_nargs_t::HN_OPTIONAL) {
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if (param.ht_nargs == help_nargs_t::HN_ONE_OR_MORE) {
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out.append("1"_variable);
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out.append(" [");
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out.append("..."_variable);
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out.append(" ");
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out.append(lnav::roles::variable(param.ht_name));
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out.append("N"_variable);
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out.append("]");
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}
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if (param.ht_group_end) {
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out.append(param.ht_group_end);
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}
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}
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out.with_attr(string_attr{
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line_range{(int) line_start, (int) out.get_string().length()},
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VC_ROLE.value(role_t::VCR_H3),
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});
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if (htc != help_text_content::synopsis) {
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alb.append("\n")
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.append(lnav::roles::table_border(
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repeat("\u2550", tws.tws_width)))
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.append("\n")
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.indent(body_indent)
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.append(attr_line_t::from_ansi_str(ht.ht_summary),
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&tws.with_indent(body_indent + 2))
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.append("\n");
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}
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break;
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}
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case help_context_t::HC_PRQL_FUNCTION: {
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auto line_start = out.al_string.length();
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out.append(lnav::roles::symbol(ht.ht_name));
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for (const auto& param : ht.ht_parameters) {
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out.append(" ");
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out.append(lnav::roles::variable(param.ht_name));
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if (param.ht_nargs == help_nargs_t::HN_ONE_OR_MORE) {
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out.append("1"_variable);
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out.append(" [");
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@ -417,6 +460,21 @@ format_help_text_for_term(const help_text& ht,
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.append(attr_line_t::from_ansi_str(param.ht_summary),
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&(tws.with_indent(2 + max_param_name_width + 3)))
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.append("\n");
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if (!param.ht_enum_values.empty()) {
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alb.indent(body_indent + max_param_name_width)
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.append(" ")
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.append("Values"_h5)
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.append(": ");
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auto initial = true;
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for (const auto* ename : param.ht_enum_values) {
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if (!initial) {
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alb.append("|");
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}
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alb.append(lnav::roles::symbol(ename));
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initial = false;
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}
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alb.append("\n");
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}
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if (!param.ht_parameters.empty()) {
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for (const auto& sub_param : param.ht_parameters) {
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alb.indent(body_indent + max_param_name_width + 3)
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@ -536,6 +594,7 @@ format_example_text_for_term(const help_text& ht,
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case help_context_t::HC_SQL_FUNCTION:
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case help_context_t::HC_SQL_TABLE_VALUED_FUNCTION:
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case help_context_t::HC_PRQL_TRANSFORM:
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case help_context_t::HC_PRQL_FUNCTION:
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readline_sqlite_highlighter(ex_line, 0);
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prompt = ";";
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break;
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@ -627,6 +686,7 @@ format_help_text_for_rst(const help_text& ht,
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prefix = "";
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break;
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case help_context_t::HC_PRQL_TRANSFORM:
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case help_context_t::HC_PRQL_FUNCTION:
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is_sql = true;
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break;
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default:
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@ -140,7 +140,7 @@ const char *PRQL_HELP =
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const char *PRQL_EXAMPLE =
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ANSI_UNDERLINE("Examples") "\n"
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" from %s | count_by { log_level }\n"
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" from %s | stats.count_by { log_level }\n"
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" from %s | filter log_line == lnav.view.top_line\n"
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;
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@ -577,7 +577,9 @@ rl_search_internal(readline_curses* rc, ln_mode_t mode, bool complete = false)
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riter != curr_stage_prql.get_attrs().rend();
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++riter)
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{
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if (riter->sa_type != &lnav::sql::PRQL_PIPE_ATTR) {
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if (riter->sa_type != &lnav::sql::PRQL_STAGE_ATTR
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|| riter->sa_range.lr_start == 0)
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{
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continue;
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}
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curr_stage_prql.insert(riter->sa_range.lr_start,
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@ -600,7 +602,9 @@ rl_search_internal(readline_curses* rc, ln_mode_t mode, bool complete = false)
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riter != prev_stage_prql.get_attrs().rend();
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++riter)
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{
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if (riter->sa_type != &lnav::sql::PRQL_PIPE_ATTR) {
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if (riter->sa_type != &lnav::sql::PRQL_STAGE_ATTR
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|| riter->sa_range.lr_start == 0)
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{
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continue;
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}
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prev_stage_prql.insert(riter->sa_range.lr_start,
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@ -589,6 +589,7 @@ static readline_context::command_t sql_commands[] = {
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.with_parameter(
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help_text{"side", "Specifies which rows to include"}
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.with_enum_values({"inner", "left", "right", "full"})
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.with_default_value("inner")
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.optional())
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.with_parameter(
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{"table", "The other table to join with the current rows"})
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@ -622,6 +623,25 @@ static readline_context::command_t sql_commands[] = {
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"prql-source",
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{"prql-source"},
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},
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{
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"stats.count_by",
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prql_cmd_sort,
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help_text(
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"stats.count_by",
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"Partition rows and count the number of rows in each partition")
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.prql_function()
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.with_parameter(help_text{"column", "The columns to group by"}
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.one_or_more()
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.with_grouping("{", "}"))
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.with_example({
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"To count rows for a particular value of column 'a'",
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"from [{a=1}, {a=1}, {a=2}] | stats.count_by a",
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help_example::language::prql,
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}),
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nullptr,
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"prql-source",
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{"prql-source"},
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},
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{
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"sort",
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prql_cmd_sort,
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@ -1045,13 +1045,136 @@ register_sqlite_funcs(sqlite3* db, sqlite_registration_func_t* reg_funcs)
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.with_tags({"json"})
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.with_example(
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{"To iterate over an array",
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R"(SELECT key,value,type,atom,fullkey,path FROM json_tree('[null,1,"two",{"three":4.5}]'))"})
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R"(SELECT key,value,type,atom,fullkey,path FROM json_tree('[null,1,"two",{"three":4.5}]'))"}),
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help_text("text.contains", "Returns true if col contains sub")
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.prql_function()
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.with_parameter(
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help_text{"sub", "The substring to look for in col"})
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.with_parameter(help_text{"col", "The string to examine"})
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.with_example({
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"To check if 'Hello' contains 'lo'",
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"from [{s='Hello'}] | select { s=text.contains 'lo' s }",
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help_example::language::prql,
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})
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.with_example({
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"To check if 'Goodbye' contains 'lo'",
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"from [{s='Goodbye'}] | select { s=text.contains 'lo' s }",
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help_example::language::prql,
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}),
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help_text("text.ends_with", "Returns true if col ends with suffix")
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.prql_function()
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.with_parameter(
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help_text{"suffix", "The string to look for at the end of col"})
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.with_parameter(help_text{"col", "The string to examine"})
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.with_example({
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"To check if 'Hello' ends with 'lo'",
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"from [{s='Hello'}] | select { s=text.ends_with 'lo' s }",
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help_example::language::prql,
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})
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.with_example({
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"To check if 'Goodbye' ends with 'lo'",
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"from [{s='Goodbye'}] | select { s=text.ends_with 'lo' s }",
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help_example::language::prql,
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}),
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help_text("text.extract", "Extract a slice of a string")
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.prql_function()
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.with_parameter(help_text{
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"idx",
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"The starting index where the first character is index 1"})
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.with_parameter(help_text{"len", "The length of the slice"})
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.with_parameter(help_text{"str", "The string to extract from"})
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.with_example({
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"To extract a substring from s",
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"from [{s='Hello, World!'}] | select { s=text.extract 1 5 s }",
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help_example::language::prql,
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}),
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help_text("text.length", "Returns the number of characters in col")
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.prql_function()
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.with_parameter(help_text{"col", "The string to examine"})
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.with_example({
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"To count the number of characters in s",
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"from [{s='Hello, World!'}] | select { s=text.length s }",
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help_example::language::prql,
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}),
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help_text("text.lower", "Converts col to lowercase")
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.prql_function()
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.with_parameter(help_text{"col", "The string to convert"})
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.with_example({
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"To convert s to lowercase",
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"from [{s='HELLO'}] | select { s=text.lower s }",
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help_example::language::prql,
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}),
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help_text("text.ltrim", "Remove whitespace from the left side of col")
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.prql_function()
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.with_parameter(help_text{"col", "The string to trim"})
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.with_example({
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"To trim the left side of s",
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"from [{s=' HELLO '}] | select { s=text.ltrim s }",
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help_example::language::prql,
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}),
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help_text("text.replace",
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"Replace all occurrences of before with after in col")
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.prql_function()
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.with_parameter(help_text{"before", "The string to find"})
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.with_parameter(help_text{"after", "The replacement"})
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.with_parameter(help_text{"col", "The string to trim"})
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.with_example({
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"To erase foo in s",
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"from [{s='foobar'}] | select { s=text.replace 'foo' '' s }",
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help_example::language::prql,
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}),
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help_text("text.rtrim", "Remove whitespace from the right side of col")
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.prql_function()
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.with_parameter(help_text{"col", "The string to trim"})
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.with_example({
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"To trim the right side of s",
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"from [{s=' HELLO '}] | select { s=text.rtrim s }",
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help_example::language::prql,
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}),
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help_text("text.starts_with", "Returns true if col starts with suffix")
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.prql_function()
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.with_parameter(help_text{
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"suffix", "The string to look for at the start of col"})
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.with_parameter(help_text{"col", "The string to examine"})
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.with_example({
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"To check if 'Hello' starts with 'lo'",
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"from [{s='Hello'}] | select { s=text.starts_with 'He' s }",
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help_example::language::prql,
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})
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.with_example({
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"To check if 'Goodbye' starts with 'lo'",
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"from [{s='Goodbye'}] | select { s=text.starts_with 'He' s }",
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help_example::language::prql,
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}),
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help_text("text.trim", "Remove whitespace from the both sides of col")
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.prql_function()
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.with_parameter(help_text{"col", "The string to trim"})
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.with_example({
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"To trim s",
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"from [{s=' HELLO '}] | select { s=text.trim s }",
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help_example::language::prql,
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}),
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help_text("text.upper", "Converts col to uppercase")
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.prql_function()
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.with_parameter(help_text{"col", "The string to convert"})
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.with_example({
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"To convert s to uppercase",
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"from [{s='hello'}] | select { s=text.upper s }",
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help_example::language::prql,
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}),
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};
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if (!help_registration_done) {
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for (auto& ht : builtin_funcs) {
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sqlite_function_help.insert(std::make_pair(ht.ht_name, &ht));
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switch (ht.ht_context) {
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case help_context_t::HC_PRQL_FUNCTION:
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lnav::sql::prql_functions.emplace(ht.ht_name, &ht);
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break;
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default:
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sqlite_function_help.emplace(ht.ht_name, &ht);
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break;
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}
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ht.index_tags();
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}
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}
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@ -952,7 +952,8 @@ execute_example(const help_text& ht)
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case help_context_t::HC_SQL_INFIX:
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case help_context_t::HC_SQL_FUNCTION:
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case help_context_t::HC_SQL_TABLE_VALUED_FUNCTION:
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case help_context_t::HC_PRQL_TRANSFORM: {
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case help_context_t::HC_PRQL_TRANSFORM:
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case help_context_t::HC_PRQL_FUNCTION: {
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exec_context ec;
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ec.ec_label_source_stack.push_back(&dls);
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@ -1010,6 +1011,12 @@ execute_examples()
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for (auto help_pair : sqlite_function_help) {
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execute_example(*help_pair.second);
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}
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for (auto help_pair : lnav::sql::prql_functions) {
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if (help_pair.second->ht_context != help_context_t::HC_PRQL_FUNCTION) {
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continue;
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}
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execute_example(*help_pair.second);
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}
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for (auto cmd_pair : *sql_cmd_map) {
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if (cmd_pair.second->c_help.ht_context
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!= help_context_t::HC_PRQL_TRANSFORM)
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