Andy Kopra
240cff4278
A snapshot of the development tree. The substantial changes since the last one:
COMMAND OUTPUT POLICY. The three commands display text in exactly three cases,
and each owns a stream: LOGGING under "-v" greater than 0 and an ERROR before
termination go to STDERR; OUTPUT THE USER ASKED FOR goes to STDOUT. For ktext
that output is a document, so "ktext doc.kt -d | ..." is now safe -- logging
used to share the stream and land inside the document. A bare command prints
its usage and succeeds rather than failing. Colour is emitted only to a
terminal, per stream, and NO_COLOR is honoured.
"-v 1" reports every decision whose outcome you could not have read off your own
input: the klammerset that was loaded and from which file, a font's directory, a
":files" name's file, how "-o" was expanded. Higher levels are the trace.
The commands no longer warn and continue: an anomaly is an error, described with
its location. Two exceptions remain, each for a stated reason -- a condition
that is expected and temporary by design, and a judgment that is a heuristic
rather than exact.
@cond IS NOW A TRUE SPECIAL FORM, resolved at APPLICATION time rather than when
the file is read. Two consequences for a writer:
* a state variable reaches the predicate. "@@@state Flag :value true @@@
@cond *Flag* | T | F @" renders "T"; it used to see the literal "*Flag*" and
silently take the false branch. The document now behaves like a klammer
body, whose arguments are bound before its conditionals are decided.
* nothing in a discarded branch happens -- it is not read, not evaluated, not
expanded. An @eval in the branch not taken used to run anyway.
Its predicate relation is total and strict: true, True, 1; false, False, 0, and
empty; anything else is an error at the @cond rather than silently false.
@eval REACHING OUTSIDE. ":shell" and ":haskell" now keep the command's standard
error out of the document (it appears under "-v 1") and treat a nonzero exit as
an error naming what the command reported. A command that exits nonzero on
purpose -- "grep" finding no match -- says so with "|| true".
KLAMMER SETS. Several combine: "--klammersets a b c" loads all three in the
order given, sharing one namespace, with the definition modes deciding
collisions. "none" means none and may not be combined with other symbols. A
klammerset with symbol X is declared in a file X/X.k, which is what lets two
sets require the same third set without loading it twice.
TESTS. Four new suites: the kdiag command's interface, the @eval primitive's
contract with the outside world, and verbosity at both tiers. Three suites
that could not run on macOS at all now do.
Assembled from dev commit 6c8ee6c22fca.
104 lines
4.1 KiB
C++
104 lines
4.1 KiB
C++
#include <iostream>
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#include "error.h"
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#include "command.h"
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#include "log.h"
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#include "argv.h"
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#include "file.h"
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#include "util.h"
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#include "machine.h"
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#include "show.h"
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#include "target_registry.h"
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#include "klammerset_registry.h"
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int main(int argc, char* argv[])
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{
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try {
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set_verbose_level(argc, argv);
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Argv args {};
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args.req("filenames", "Input files in Klammertext format. ", "'list'");
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args.opt("s", "Text processed before input files.", "input-string", "", "'text'");
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args.opt("t","Output target; default is general (unspecified)", "target",
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Target_registry::general_name, "'word'");
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args.opt("o", "Output basename; meaning and default defined by target.", "basename",
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"", "'word'");
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args.flag("d", "Display the output to the screen, rather than writing a file.");
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args.opt("klammersets", "Klammersets to load, as a list of symbols resolved on the "
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"klammerset search path. Several combine: they are loaded in the order given "
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"and share one namespace. The default is the Standard Klammer Set; "
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"\"none\" loads none.",
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"symbols", "", "'list'");
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args.opt("v", "'verbosity'", "degree", "0", "'verbosity'");
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if (show_usage(argc, argv)) {
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// A bare command is a REQUEST for information, not a failure:
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// usage goes to stdout (it is the result being asked for) and the
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// exit status is 0, so "ktext && echo ok" reports what happened.
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args.usage(file_basename(argv[0]));
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exit(0);
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}
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args.parse(argc, argv);
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if (verbose_level > 0) {
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args.describe();
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}
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std::string input_text = args.as_string("s");
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// argv boundaries are authoritative (a shell-quoted "my file.kt" is
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// one element); group_filename_tokens adds the standalone-"/" list
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// form, the existence rescue for unquoted spaces, and ~ expansion.
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std::vector<std::string> input_filenames =
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group_filename_tokens(args.as_vector("filenames"));
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if (input_text.empty() && input_filenames.empty()) {
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throw Argument_error(
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"You must specify input filenames and/or text", Locator());
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}
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auto [target, output_dir, output_basename, output_filename,
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write_files, display_only] =
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parse_args(input_filenames, args.as_string("t"),
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expand_tilde(args.as_string("o")), args.as_bool("d"));
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Machine M;
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M.m_state.open_frame("ktext");
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M.m_state.set("K_target", target);
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M.m_state.set("K_output_dir", output_dir);
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M.m_state.set("K_output_basename", output_basename);
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M.m_state.set("K_stdout_only", display_only ? "true" : "false");
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// The list form uses the standalone-"/" separator (filenames may
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// contain spaces); K_input_filename is the single root input file.
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M.m_state.set("K_input_filenames", join(input_filenames, " / "));
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M.m_state.set("K_input_filename",
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input_filenames.empty() ? "" : input_filenames[0]);
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M.m_state.set("K_verbose_level", std::to_string(verbose_level));
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if (!input_filenames.empty()) {
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M.m_state.set(
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"K_input_dir",absolute_pathname(file_directory(input_filenames[0])));
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} else {
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M.m_state.set("K_input_dir", fs::current_path().string());
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}
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load_klammersets(M, word_split(args.as_string("klammersets")));
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if (!input_text.empty()) {
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M.read(input_text + "\n");
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}
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for (auto p : input_filenames) {
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M.read(fs::path(p));
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}
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std::string result = trim(M.apply(target));
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if (display_only && !result.empty()) {
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std::cout << result << "\n";
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} else if (!result.empty()) {
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string_to_file(output_filename, result + "\n");
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(void)K::log(1, "Wrote file: " + output_filename);
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}
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}
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catch (Error& err) {
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err.print_message();
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std::cerr << "\n";
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return 1;
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}
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return 0;
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}
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