feat! drop support to act as a Pandoc filter

When we change Subplot to take a YAML file instead of a Markdown file
as input, it doesn't make sense to act as a Pandoc filter anymore:
Pandoc doesn't understand our YAML file.

In any case, I seem to have been the only user ever of that feature,
so it won't really bother anyone else. Even so, we should treat this
as a breaking change.

"subplot docgen" still works as before.

Sponsored-by: author

2 files changed, 2 insertions, 74 deletions

diff --git a/src/bin/subplot-filter.rs b/src/bin/subplot-filter.rs
deleted file mode 100644
index 6c01241..0000000
--- a/src/bin/subplot-filter.rs
+++ /dev/null
@@ -1,16 +0,0 @@
-use anyhow::Result;
-use std::io::{self, Read, Write};
-use subplot::{Document, Style};
-
-fn main() -> Result<()> {
-    let mut buffer = String::new();
-    let mut stdin = io::stdin();
-    stdin.read_to_string(&mut buffer)?;
-    let basedir = std::path::Path::new(".");
-    let style = Style::default();
-    let mut doc = Document::from_json(&basedir, vec![], &buffer, style, None)?;
-    doc.typeset();
-    let bytes = doc.ast()?.into_bytes();
-    io::stdout().write_all(&bytes)?;
-    Ok(())
-}
diff --git a/src/bin/subplot.rs b/src/bin/subplot.rs
index 5e802b4..759b70b 100644
--- a/src/bin/subplot.rs
+++ b/src/bin/subplot.rs
@@ -13,8 +13,8 @@ use time::{format_description::FormatItem, macros::format_description, OffsetDat
 use clap::{CommandFactory, FromArgMatches, Parser};
 use std::convert::TryFrom;
 use std::ffi::OsString;
-use std::fs::{self, write, File};
-use std::io::{Read, Write};
+use std::fs::{self, write};
+use std::io::Write;
 use std::path::{Path, PathBuf};
 use std::process::{self, Command};
 use std::time::UNIX_EPOCH;
@@ -53,7 +53,6 @@ impl Toplevel {
 #[derive(Debug, Parser)]
 enum Cmd {
     Extract(Extract),
-    Filter(Filter),
     Metadata(Metadata),
     Docgen(Docgen),
     Codegen(Codegen),
@@ -65,7 +64,6 @@ impl Cmd {
     fn run(&self) -> Result<()> {
         match self {
             Cmd::Extract(e) => e.run(),
-            Cmd::Filter(f) => f.run(),
             Cmd::Metadata(m) => m.run(),
             Cmd::Docgen(d) => d.run(),
             Cmd::Codegen(c) => c.run(),
@@ -76,7 +74,6 @@ impl Cmd {
     fn doc_path(&self) -> Option<&Path> {
         match self {
             Cmd::Extract(e) => e.doc_path(),
-            Cmd::Filter(f) => f.doc_path(),
             Cmd::Metadata(m) => m.doc_path(),
             Cmd::Docgen(d) => d.doc_path(),
             Cmd::Codegen(c) => c.doc_path(),
@@ -194,59 +191,6 @@ impl Extract {
 }
 
 #[derive(Debug, Parser)]
-/// Filter a pandoc JSON document.
-///
-/// This filters a pandoc JSON document, applying Subplot's formatting rules and
-/// image conversion support.
-///
-/// If input/output filename is provided, this operates on STDIN/STDOUT.
-struct Filter {
-    #[clap(name = "INPUT", long = "input", short = 'i', parse(from_os_str))]
-    /// Input file (uses STDIN if omitted)
-    input: Option<PathBuf>,
-
-    #[clap(name = "OUTPUT", long = "output", short = 'o', parse(from_os_str))]
-    /// Output file (uses STDOUT if omitted)
-    output: Option<PathBuf>,
-
-    #[clap(name = "BASE", long = "base", short = 'b', parse(from_os_str))]
-    /// Base directory (defaults to dir of input if given, or '.' if using STDIN)
-    base: Option<PathBuf>,
-}
-
-impl Filter {
-    fn doc_path(&self) -> Option<&Path> {
-        self.input.as_deref().and_then(Path::parent)
-    }
-
-    fn run(&self) -> Result<()> {
-        let mut buffer = String::new();
-        if let Some(filename) = &self.input {
-            File::open(filename)?.read_to_string(&mut buffer)?;
-        } else {
-            std::io::stdin().read_to_string(&mut buffer)?;
-        }
-        let basedir = if let Some(path) = &self.base {
-            path.as_path()
-        } else if let Some(path) = &self.input {
-            path.parent().unwrap_or_else(|| Path::new("."))
-        } else {
-            Path::new(".")
-        };
-        let style = Style::default();
-        let mut doc = Document::from_json(basedir, vec![], &buffer, style, None)?;
-        doc.typeset();
-        let bytes = doc.ast()?.into_bytes();
-        if let Some(filename) = &self.output {
-            File::create(filename)?.write_all(&bytes)?;
-        } else {
-            std::io::stdout().write_all(&bytes)?;
-        }
-        Ok(())
-    }
-}
-
-#[derive(Debug, Parser)]
 /// Extract metadata about a document
 ///
 /// Load and process a subplot document, extracting various metadata about the