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* Fix capturing output for internal poemsRory Dudley2024-06-211-1/+9
| | | | | | | | | | Sometime when the switch to the new built-in command system was happening, we lost the logic to force the capture the output of STDOUT, mainly used for running internal poems (i.e. 'ls `ls`'). This patch adds a new field to the Environment struct, called fc (force capture). It gets set to true before running internal poems, and unset afterwards. Finally, some checks were added to the incant!() macro to properly handle STDOUT when fc is set.
* Add back spellcheckRory Dudley2024-06-141-8/+23
| | | | | | | | | | | | | | This commit reworks spellcheck() so it is more verbose about what it returns. It also re-introduces the use of spellcheck() in Poem::recite(). Spellcheck now returns a value in the enum, Spelling: FullPath -> Indicates a full path was specified as the verb OnPath -> Indicates the verb is on the $PATH BuiltIn -> Indicates the verb is a built-in command None (Option) -> The verb does not exist This commit also removes some defunct (commented-out) code.
* Updated the way built-in commands are called/usedRory Dudley2024-06-042-210/+251
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Previously, built-in commands were fairly primitive, merely outputting STDOUT and STDERR with the print! macros. However, we need them to behave like normal programs, that is: - Acknowledge their verse's meter (forking, piping, etc.), - Ability to capture STDOUT and STDERR (>, 2>), - and Affect the currently running environment. For these reasons, the anthology was reworked, and now contains the Anthology struct, which mimics both std::process::{Child, Command}. The AnthologyStdin helper struct was also created, for built-ins to take input on STDIN, though no built-in is currently using it. Each built-ins' incant functions were updated to return a std::process::Output. It contains output from STDOUT, output from STDERR, and the exit code of the "process". A fix was also implemented for aliases, where the STDOUT and STDERR vectors were not being copied to the newly constructed verse. Notes: There is some cleanup that needs to happen on this patch. For one, the spellcheck function is no longer being used, so there is a generic OS error if the program cannot be found in the $PATH. Also, anthology::lookup gets called twice, which shouldn't need to happen.
* Update the return value of Verse::spellcheck()Rory Dudley2024-05-201-12/+13
| | | | | | | | | | | | | Instead of returning true or false, if a given bin is found on the $PATH, return the index of where the bin was found. This is useful, in case we want to actually get the full path of the bin. If a full or relative path is specified, the function will return the length of the bins vector. Notes: This is primarily useful for the built-in 'which' command, so that we can print out the full bin path without invoking /usr/bin/which.
* Updated/added doc comments for the Verse elementRory Dudley2024-05-201-4/+61
| | | | | | | | | | Added definitions of fields for the Verse struct, and updated its wording to accomodate for the type change of the couplet field. Updated the wording of Verse::add() to make it more verbose, and also added descriptions of the arguments, alongside some example usage. Added documentation comments for the Verse::incant() function.
* Update doc comments for RunesRory Dudley2024-05-201-0/+4
| | | | | Added documentation comments for the new Runes that help with handling file redirection of STDERR.
* Don't clear 'out' unconditionallyRory Dudley2024-05-201-1/+3
| | | | | Only clear the 'out' vector when the verse is not a couplet, otherwise text will not be piped to the next verse in the poem.
* Handle STDERR, in addition to STDOUTRory Dudley2024-05-192-335/+289
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch overhauls the reading and reciting of verses, such that the redirection of STDERR (in addition to STDOUT, which was already a feature), is now possible. Removed the 'stdout' argument from recite(), since it is no longer needed with how incantations function. A verse's couplet indicator is now a u8, instead of a bool, with certain values corresponding to types of couplets, for instance: ls | grep Ca | lolcat ^ ^ ^ | | 2: right side of a couplet | 3: both sides of a couplet 1: left side of a couplet Incantions are no longer hanlded in rune.rs, and the task macros have been removed. Now, a verse incants itself, matching on its own meter to determine how to handle the next verse. The following runes were added to help with handling STDERR: Write2 -> 2> WriteAll -> &> Addendum2 -> 2>> AddendumAll -> &>> The 'io' field in verse was changed from an Option<Rune>, to an array of Runes, since a single verse might have multiple IO operations. The following fields were added to Verse, to assist with handling STDERR: ip -> List of filenames to read into STDIN op -> List of filenames to send STDOUT to ep -> List of filenames to send STDERR to Keep track of channels when reading a poem. Channels are relating to IO operations. If channel is None, words get pushed to the verse's primary stanza (i.e. the verb or the clause). If a channel is selected, words are pushed to one of the aforementioned new fields in Verse. Read -> ip Write/Addedum -> op Write2/Addedum2 -> ep WriteAll/AddendumAll -> op and ep Notes: This commit also added tests for the new Runes.
* Remove some defunct codeRory Dudley2024-05-041-8/+0
| | | | | Remove some defunct code that was previously used to check for special runes.
* Capture STDOUT as bytes, and convert to string when necessaryRory Dudley2024-04-061-33/+51
| | | | | | | | | | | | | Previously, the recite() function created the 'out' variable, which was a String, that got passed to the various incant functions, in order to capture STDOUT in certain situations. In cases where STDOUT was captured, it was first converted to a String, and then appended to the 'out' variable, by means of String::from_utf8_lossy(). This works for basic text, however, does NOT work for binary data. This becomes problematic, when for example, downling a tar file with curl/wget, that is then piped ('|') to the tar program. Using from_utf8_lossy() in this case can corrupt the tar file. This patch makes it so that out is stored as bytes by default, and only converted to a String when necessary.
* Add comments (`#`) to the parserRory Dudley2024-03-281-1/+3
| | | | | The parser will now interpret the '#' character as a single-line comment string, which works on it's own line, or at the end of an existing line.
* Documentation for incant_Rory Dudley2024-03-241-0/+1
| | | | Add docstring for `incant_quiet_io`.
* read() and recite() overhaulRory Dudley2024-03-234-0/+534
Rebuilt the LR parser (i.e. read()) from the ground up. This required that some changes be made to recite(), in order to accomodate the new data structures. These data structures were each split out into their own file, in order to make working with each component a bit easier. In addition to reworking the parts of the parser already present, some new features were also added, such as: - Support for strings (' and ") - Support for environment variables ($) - Support for interpreting tild as $HOME (~) - Support for sub-reading and sub-reciting (`) Notes: This is a huge commit that changes almost the entire program (main.rs is still the same, except for imports). Ideally, huge sweeping changes like this should not occur on the codebase, but since this is still pre-alpha, I guess this is acceptable. This is far from the end of patch set, however, as there is quite a lot of cleanup that needs to be done. For instance, checking for internal poems and environment variables should get split out to their own functions/macros. There is also some defunct code (that's commented out), that is unlikely to be useful in the future.