refactor gemtext tools into its own crate

Cargo.toml

@@ -28,6 +28,8 @@ url = "2"
 webpki-roots = { version = "0.20", optional = true }
 webpki = { version = "0.21.0", optional = true }
 
+gemtext = { path = "./gemtext" }
+
 [dev-dependencies]
 pretty_env_logger = "0.4"
 
@@ -54,6 +56,7 @@ server = [
 
 [workspace]
 members = [
+  "./gemtext",
   "./majc",
   "./majd",
   "./site",

gemtext/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "gemtext"
+version = "0.1.0"
+authors = ["Christine Dodrill <me@christine.website>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+
+[dev-dependencies]
+pretty_env_logger = "0.4"

gemtext/src/lib.rs

@@ -0,0 +1,340 @@
+/// This module implements a simple text/gemini parser based on the description
+/// here: https://gemini.circumlunar.space/docs/specification.html
+use std::io::{self, Write};
+
+/// Build a gemini document up from a series of nodes.
+#[derive(Default)]
+pub struct Builder {
+    nodes: Vec<Node>,
+}
+
+impl Builder {
+    pub fn new() -> Builder {
+        Builder::default()
+    }
+
+    pub fn text<T: Into<String>>(mut self, data: T) -> Builder {
+        self.nodes.push(Node::Text(data.into()));
+        self
+    }
+
+    pub fn link<T: Into<String>>(mut self, to: T, name: Option<String>) -> Builder {
+        self.nodes.push(Node::Link {
+            to: to.into(),
+            name: name,
+        });
+        self
+    }
+
+    pub fn preformatted<T: Into<String>>(mut self, data: T) -> Builder {
+        self.nodes.push(Node::Preformatted(data.into()));
+        self
+    }
+
+    pub fn heading<T: Into<String>>(mut self, level: u8, body: T) -> Builder {
+        self.nodes.push(Node::Heading {
+            level: level,
+            body: body.into(),
+        });
+        self
+    }
+
+    pub fn list_item<T: Into<String>>(mut self, item: T) -> Builder {
+        self.nodes.push(Node::ListItem(item.into()));
+        self
+    }
+
+    pub fn quote<T: Into<String>>(mut self, body: T) -> Builder {
+        self.nodes.push(Node::Quote(body.into()));
+        self
+    }
+
+    pub fn build(self) -> Vec<Node> {
+        self.nodes
+    }
+}
+
+/// Render a set of nodes as a document to a writer.
+pub fn render(nodes: Vec<Node>, out: &mut impl Write) -> io::Result<()> {
+    use Node::*;
+
+    for node in nodes {
+        match node {
+            Text(body) => write!(out, "{}\n", body)?,
+            Link { to, name } => match name {
+                Some(name) => write!(out, "=> {} {}\n", to, name)?,
+                None => write!(out, "=> {}\n", to)?,
+            },
+            Preformatted(body) => write!(out, "```\n{}\n```\n", body)?,
+            Heading { level, body } => write!(out, "{} {}\n", "#".repeat(level as usize), body)?,
+            ListItem(body) => write!(out, "* {}\n", body)?,
+            Quote(body) => write!(out, "> {}\n", body)?,
+        };
+    }
+
+    Ok(())
+}
+
+/// Individual nodes of the document. Each node correlates to a line in the file.
+#[derive(Debug, PartialEq, Eq)]
+pub enum Node {
+    /// Text lines are the most fundamental line type - any line which does not
+    /// match the definition of another line type defined below defaults to
+    /// being a text line. The majority of lines in a typical text/gemini document will be text lines.
+    Text(String),
+
+    /// Lines beginning with the two characters "=>" are link lines, which have the following syntax:
+    ///
+    /// ```gemini
+    /// =>[<whitespace>]<URL>[<whitespace><USER-FRIENDLY LINK NAME>]
+    /// ```
+    ///
+    /// where:
+    ///
+    /// * `<whitespace>` is any non-zero number of consecutive spaces or tabs
+    /// * Square brackets indicate that the enclosed content is optional.
+    /// * `<URL>` is a URL, which may be absolute or relative. If the URL
+    ///   does not include a scheme, a scheme of `gemini://` is implied.
+    Link { to: String, name: Option<String> },
+
+    /// Any line whose first three characters are "```" (i.e. three consecutive
+    /// back ticks with no leading whitespace) are preformatted toggle lines.
+    /// These lines should NOT be included in the rendered output shown to the
+    /// user. Instead, these lines toggle the parser between preformatted mode
+    /// being "on" or "off". Preformatted mode should be "off" at the beginning
+    /// of a document. The current status of preformatted mode is the only
+    /// internal state a parser is required to maintain. When preformatted mode
+    /// is "on", the usual rules for identifying line types are suspended, and
+    /// all lines should be identified as preformatted text lines (see 5.4.4).
+    ///
+    /// Preformatted text lines should be presented to the user in a "neutral",
+    /// monowidth font without any alteration to whitespace or stylistic
+    /// enhancements. Graphical clients should use scrolling mechanisms to present
+    /// preformatted text lines which are longer than the client viewport, in
+    /// preference to wrapping. In displaying preformatted text lines, clients
+    /// should keep in mind applications like ASCII art and computer source
+    /// code: in particular, source code in languages with significant whitespace
+    /// (e.g. Python) should be able to be copied and pasted from the client into
+    /// a file and interpreted/compiled without any problems arising from the
+    /// client's manner of displaying them.
+    Preformatted(String),
+
+    /// Lines beginning with "#" are heading lines. Heading lines consist of one,
+    /// two or three consecutive "#" characters, followed by optional whitespace,
+    /// followed by heading text. The number of # characters indicates the "level"
+    /// of header; #, ## and ### can be thought of as analogous to `<h1>`, `<h2>`
+    /// and `<h3>` in HTML.
+    ///
+    /// Heading text should be presented to the user, and clients MAY use special
+    /// formatting, e.g. a larger or bold font, to indicate its status as a header
+    /// (simple clients may simply print the line, including its leading #s,
+    /// without any styling at all). However, the main motivation for the
+    /// definition of heading lines is not stylistic but to provide a
+    /// machine-readable representation of the internal structure of the document.
+    /// Advanced clients can use this information to, e.g. display an automatically
+    /// generated and hierarchically formatted "table of contents" for a long
+    /// document in a side-pane, allowing users to easily jump to specific sections
+    /// without excessive scrolling. CMS-style tools automatically generating menus
+    /// or Atom/RSS feeds for a directory of text/gemini files can use first
+    /// heading in the file as a human-friendly title.
+    Heading { level: u8, body: String },
+
+    /// Lines beginning with "* " are unordered list items. This line type exists
+    /// purely for stylistic reasons. The * may be replaced in advanced clients by
+    /// a bullet symbol. Any text after the "* " should be presented to the user as
+    /// if it were a text line, i.e. wrapped to fit the viewport and formatted
+    /// "nicely". Advanced clients can take the space of the bullet symbol into
+    /// account when wrapping long list items to ensure that all lines of text
+    /// corresponding to the item are offset an equal distance from the left of the screen.
+    ListItem(String),
+
+    /// Lines beginning with ">" are quote lines. This line type exists so that
+    /// advanced clients may use distinct styling to convey to readers the important
+    /// semantic information that certain text is being quoted from an external
+    /// source. For example, when wrapping long lines to the the viewport, each
+    /// resultant line may have a ">" symbol placed at the front.
+    Quote(String),
+}
+
+impl Node {
+    pub fn blank() -> Node {
+        Node::Text("".to_string())
+    }
+}
+
+pub fn parse(doc: &str) -> Vec<Node> {
+    let mut result: Vec<Node> = vec![];
+    let mut collect_preformatted: bool = false;
+    let mut preformatted_buffer: Vec<u8> = vec![];
+
+    for line in doc.lines() {
+        if line.starts_with("```") {
+            collect_preformatted = !collect_preformatted;
+            if !collect_preformatted {
+                result.push(Node::Preformatted(
+                    String::from_utf8(preformatted_buffer)
+                        .unwrap()
+                        .trim_end()
+                        .to_string(),
+                ));
+                preformatted_buffer = vec![];
+            }
+            continue;
+        }
+
+        if collect_preformatted && line != "```" {
+            write!(preformatted_buffer, "{}\n", line).unwrap();
+            continue;
+        }
+
+        // Quotes
+        if line.starts_with(">") {
+            result.push(Node::Quote(line[1..].trim().to_string()));
+            continue;
+        }
+
+        // List items
+        if line.starts_with("*") {
+            result.push(Node::ListItem(line[1..].trim().to_string()));
+            continue;
+        }
+
+        // Headings
+        if line.starts_with("###") {
+            result.push(Node::Heading {
+                level: 3,
+                body: line[3..].trim().to_string(),
+            });
+            continue;
+        }
+        if line.starts_with("##") {
+            result.push(Node::Heading {
+                level: 2,
+                body: line[2..].trim().to_string(),
+            });
+            continue;
+        }
+        if line.starts_with("#") {
+            result.push(Node::Heading {
+                level: 1,
+                body: line[1..].trim().to_string(),
+            });
+            continue;
+        }
+
+        // Links
+        if line.starts_with("=>") {
+            let sp = line[2..].split_ascii_whitespace().collect::<Vec<&str>>();
+
+            match sp.len() {
+                1 => result.push(Node::Link {
+                    to: sp[0].trim().to_string(),
+                    name: None,
+                }),
+                _ => result.push(Node::Link {
+                    to: sp[0].trim().to_string(),
+                    name: Some(sp[1..].join(" ").trim().to_string()),
+                }),
+            }
+
+            continue;
+        }
+
+        result.push(Node::Text(line.to_string()));
+    }
+
+    result
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    #[test]
+    fn basic() {
+        let _ = pretty_env_logger::try_init();
+        let msg = include_str!("../../majc/src/help.gmi");
+        let doc = super::parse(msg);
+        assert_ne!(doc.len(), 0);
+    }
+
+    #[test]
+    fn quote() {
+        let _ = pretty_env_logger::try_init();
+        let msg = ">hi there";
+        let expected: Vec<Node> = vec![Node::Quote("hi there".to_string())];
+        assert_eq!(expected, parse(msg));
+    }
+
+    #[test]
+    fn list() {
+        let _ = pretty_env_logger::try_init();
+        let msg = "*hi there";
+        let expected: Vec<Node> = vec![Node::ListItem("hi there".to_string())];
+        assert_eq!(expected, parse(msg));
+    }
+
+    #[test]
+    fn preformatted() {
+        let _ = pretty_env_logger::try_init();
+        let msg = "```\n\
+                   hi there\n\
+                   ```\n\
+                   \n\
+                   Test\n";
+        let expected: Vec<Node> = vec![
+            Node::Preformatted("hi there".to_string()),
+            Node::Text(String::new()),
+            Node::Text("Test".to_string()),
+        ];
+        assert_eq!(expected, parse(msg));
+    }
+
+    #[test]
+    fn header() {
+        let _ = pretty_env_logger::try_init();
+        let msg = "#hi\n##there\n### my friends";
+        let expected: Vec<Node> = vec![
+            Node::Heading {
+                level: 1,
+                body: "hi".to_string(),
+            },
+            Node::Heading {
+                level: 2,
+                body: "there".to_string(),
+            },
+            Node::Heading {
+                level: 3,
+                body: "my friends".to_string(),
+            },
+        ];
+        assert_eq!(expected, parse(msg));
+    }
+
+    #[test]
+    fn link() {
+        let _ = pretty_env_logger::try_init();
+        let msg = "=>/\n=> / Go home";
+        let expected: Vec<Node> = vec![
+            Node::Link {
+                to: "/".to_string(),
+                name: None,
+            },
+            Node::Link {
+                to: "/".to_string(),
+                name: Some("Go home".to_string()),
+            },
+        ];
+        assert_eq!(expected, parse(msg));
+    }
+
+    #[test]
+    fn ambiguous_preformatted() {
+        let _ = pretty_env_logger::try_init();
+        let msg = include_str!("../../testdata/ambig_preformatted.gmi");
+        let expected: Vec<Node> = vec![
+            Node::Preformatted("FOO".to_string()),
+            Node::Text("Foo bar".to_string()),
+        ];
+        assert_eq!(expected, parse(msg));
+    }
+}

src/gemini.rs

@@ -1,340 +1 @@
-/// This module implements a simple text/gemini parser based on the description
-/// here: https://gemini.circumlunar.space/docs/specification.html
-use std::io::{self, Write};
-
-/// Build a gemini document up from a series of nodes.
-#[derive(Default)]
-pub struct Builder {
-    nodes: Vec<Node>,
-}
-
-impl Builder {
-    pub fn new() -> Builder {
-        Builder::default()
-    }
-
-    pub fn text<T: Into<String>>(mut self, data: T) -> Builder {
-        self.nodes.push(Node::Text(data.into()));
-        self
-    }
-
-    pub fn link<T: Into<String>>(mut self, to: T, name: Option<String>) -> Builder {
-        self.nodes.push(Node::Link {
-            to: to.into(),
-            name: name,
-        });
-        self
-    }
-
-    pub fn preformatted<T: Into<String>>(mut self, data: T) -> Builder {
-        self.nodes.push(Node::Preformatted(data.into()));
-        self
-    }
-
-    pub fn heading<T: Into<String>>(mut self, level: u8, body: T) -> Builder {
-        self.nodes.push(Node::Heading {
-            level: level,
-            body: body.into(),
-        });
-        self
-    }
-
-    pub fn list_item<T: Into<String>>(mut self, item: T) -> Builder {
-        self.nodes.push(Node::ListItem(item.into()));
-        self
-    }
-
-    pub fn quote<T: Into<String>>(mut self, body: T) -> Builder {
-        self.nodes.push(Node::Quote(body.into()));
-        self
-    }
-
-    pub fn build(self) -> Vec<Node> {
-        self.nodes
-    }
-}
-
-/// Render a set of nodes as a document to a writer.
-pub fn render(nodes: Vec<Node>, out: &mut impl Write) -> io::Result<()> {
-    use Node::*;
-
-    for node in nodes {
-        match node {
-            Text(body) => write!(out, "{}\n", body)?,
-            Link { to, name } => match name {
-                Some(name) => write!(out, "=> {} {}\n", to, name)?,
-                None => write!(out, "=> {}\n", to)?,
-            },
-            Preformatted(body) => write!(out, "```\n{}\n```\n", body)?,
-            Heading { level, body } => write!(out, "{} {}\n", "#".repeat(level as usize), body)?,
-            ListItem(body) => write!(out, "* {}\n", body)?,
-            Quote(body) => write!(out, "> {}\n", body)?,
-        };
-    }
-
-    Ok(())
-}
-
-/// Individual nodes of the document. Each node correlates to a line in the file.
-#[derive(Debug, PartialEq, Eq)]
-pub enum Node {
-    /// Text lines are the most fundamental line type - any line which does not
-    /// match the definition of another line type defined below defaults to
-    /// being a text line. The majority of lines in a typical text/gemini document will be text lines.
-    Text(String),
-
-    /// Lines beginning with the two characters "=>" are link lines, which have the following syntax:
-    ///
-    /// ```gemini
-    /// =>[<whitespace>]<URL>[<whitespace><USER-FRIENDLY LINK NAME>]
-    /// ```
-    ///
-    /// where:
-    ///
-    /// * `<whitespace>` is any non-zero number of consecutive spaces or tabs
-    /// * Square brackets indicate that the enclosed content is optional.
-    /// * `<URL>` is a URL, which may be absolute or relative. If the URL
-    ///   does not include a scheme, a scheme of `gemini://` is implied.
-    Link { to: String, name: Option<String> },
-
-    /// Any line whose first three characters are "```" (i.e. three consecutive
-    /// back ticks with no leading whitespace) are preformatted toggle lines.
-    /// These lines should NOT be included in the rendered output shown to the
-    /// user. Instead, these lines toggle the parser between preformatted mode
-    /// being "on" or "off". Preformatted mode should be "off" at the beginning
-    /// of a document. The current status of preformatted mode is the only
-    /// internal state a parser is required to maintain. When preformatted mode
-    /// is "on", the usual rules for identifying line types are suspended, and
-    /// all lines should be identified as preformatted text lines (see 5.4.4).
-    ///
-    /// Preformatted text lines should be presented to the user in a "neutral",
-    /// monowidth font without any alteration to whitespace or stylistic
-    /// enhancements. Graphical clients should use scrolling mechanisms to present
-    /// preformatted text lines which are longer than the client viewport, in
-    /// preference to wrapping. In displaying preformatted text lines, clients
-    /// should keep in mind applications like ASCII art and computer source
-    /// code: in particular, source code in languages with significant whitespace
-    /// (e.g. Python) should be able to be copied and pasted from the client into
-    /// a file and interpreted/compiled without any problems arising from the
-    /// client's manner of displaying them.
-    Preformatted(String),
-
-    /// Lines beginning with "#" are heading lines. Heading lines consist of one,
-    /// two or three consecutive "#" characters, followed by optional whitespace,
-    /// followed by heading text. The number of # characters indicates the "level"
-    /// of header; #, ## and ### can be thought of as analogous to `<h1>`, `<h2>`
-    /// and `<h3>` in HTML.
-    ///
-    /// Heading text should be presented to the user, and clients MAY use special
-    /// formatting, e.g. a larger or bold font, to indicate its status as a header
-    /// (simple clients may simply print the line, including its leading #s,
-    /// without any styling at all). However, the main motivation for the
-    /// definition of heading lines is not stylistic but to provide a
-    /// machine-readable representation of the internal structure of the document.
-    /// Advanced clients can use this information to, e.g. display an automatically
-    /// generated and hierarchically formatted "table of contents" for a long
-    /// document in a side-pane, allowing users to easily jump to specific sections
-    /// without excessive scrolling. CMS-style tools automatically generating menus
-    /// or Atom/RSS feeds for a directory of text/gemini files can use first
-    /// heading in the file as a human-friendly title.
-    Heading { level: u8, body: String },
-
-    /// Lines beginning with "* " are unordered list items. This line type exists
-    /// purely for stylistic reasons. The * may be replaced in advanced clients by
-    /// a bullet symbol. Any text after the "* " should be presented to the user as
-    /// if it were a text line, i.e. wrapped to fit the viewport and formatted
-    /// "nicely". Advanced clients can take the space of the bullet symbol into
-    /// account when wrapping long list items to ensure that all lines of text
-    /// corresponding to the item are offset an equal distance from the left of the screen.
-    ListItem(String),
-
-    /// Lines beginning with ">" are quote lines. This line type exists so that
-    /// advanced clients may use distinct styling to convey to readers the important
-    /// semantic information that certain text is being quoted from an external
-    /// source. For example, when wrapping long lines to the the viewport, each
-    /// resultant line may have a ">" symbol placed at the front.
-    Quote(String),
-}
-
-impl Node {
-    pub fn blank() -> Node {
-        Node::Text("".to_string())
-    }
-}
-
-pub fn parse(doc: &str) -> Vec<Node> {
-    let mut result: Vec<Node> = vec![];
-    let mut collect_preformatted: bool = false;
-    let mut preformatted_buffer: Vec<u8> = vec![];
-
-    for line in doc.lines() {
-        if line.starts_with("```") {
-            collect_preformatted = !collect_preformatted;
-            if !collect_preformatted {
-                result.push(Node::Preformatted(
-                    String::from_utf8(preformatted_buffer)
-                        .unwrap()
-                        .trim_end()
-                        .to_string(),
-                ));
-                preformatted_buffer = vec![];
-            }
-            continue;
-        }
-
-        if collect_preformatted && line != "```" {
-            write!(preformatted_buffer, "{}\n", line).unwrap();
-            continue;
-        }
-
-        // Quotes
-        if line.starts_with(">") {
-            result.push(Node::Quote(line[1..].trim().to_string()));
-            continue;
-        }
-
-        // List items
-        if line.starts_with("*") {
-            result.push(Node::ListItem(line[1..].trim().to_string()));
-            continue;
-        }
-
-        // Headings
-        if line.starts_with("###") {
-            result.push(Node::Heading {
-                level: 3,
-                body: line[3..].trim().to_string(),
-            });
-            continue;
-        }
-        if line.starts_with("##") {
-            result.push(Node::Heading {
-                level: 2,
-                body: line[2..].trim().to_string(),
-            });
-            continue;
-        }
-        if line.starts_with("#") {
-            result.push(Node::Heading {
-                level: 1,
-                body: line[1..].trim().to_string(),
-            });
-            continue;
-        }
-
-        // Links
-        if line.starts_with("=>") {
-            let sp = line[2..].split_ascii_whitespace().collect::<Vec<&str>>();
-
-            match sp.len() {
-                1 => result.push(Node::Link {
-                    to: sp[0].trim().to_string(),
-                    name: None,
-                }),
-                _ => result.push(Node::Link {
-                    to: sp[0].trim().to_string(),
-                    name: Some(sp[1..].join(" ").trim().to_string()),
-                }),
-            }
-
-            continue;
-        }
-
-        result.push(Node::Text(line.to_string()));
-    }
-
-    result
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    #[test]
-    fn basic() {
-        let _ = pretty_env_logger::try_init();
-        let msg = include_str!("../majc/src/help.gmi");
-        let doc = super::parse(msg);
-        assert_ne!(doc.len(), 0);
-    }
-
-    #[test]
-    fn quote() {
-        let _ = pretty_env_logger::try_init();
-        let msg = ">hi there";
-        let expected: Vec<Node> = vec![Node::Quote("hi there".to_string())];
-        assert_eq!(expected, parse(msg));
-    }
-
-    #[test]
-    fn list() {
-        let _ = pretty_env_logger::try_init();
-        let msg = "*hi there";
-        let expected: Vec<Node> = vec![Node::ListItem("hi there".to_string())];
-        assert_eq!(expected, parse(msg));
-    }
-
-    #[test]
-    fn preformatted() {
-        let _ = pretty_env_logger::try_init();
-        let msg = "```\n\
-                   hi there\n\
-                   ```\n\
-                   \n\
-                   Test\n";
-        let expected: Vec<Node> = vec![
-            Node::Preformatted("hi there".to_string()),
-            Node::Text(String::new()),
-            Node::Text("Test".to_string()),
-        ];
-        assert_eq!(expected, parse(msg));
-    }
-
-    #[test]
-    fn header() {
-        let _ = pretty_env_logger::try_init();
-        let msg = "#hi\n##there\n### my friends";
-        let expected: Vec<Node> = vec![
-            Node::Heading {
-                level: 1,
-                body: "hi".to_string(),
-            },
-            Node::Heading {
-                level: 2,
-                body: "there".to_string(),
-            },
-            Node::Heading {
-                level: 3,
-                body: "my friends".to_string(),
-            },
-        ];
-        assert_eq!(expected, parse(msg));
-    }
-
-    #[test]
-    fn link() {
-        let _ = pretty_env_logger::try_init();
-        let msg = "=>/\n=> / Go home";
-        let expected: Vec<Node> = vec![
-            Node::Link {
-                to: "/".to_string(),
-                name: None,
-            },
-            Node::Link {
-                to: "/".to_string(),
-                name: Some("Go home".to_string()),
-            },
-        ];
-        assert_eq!(expected, parse(msg));
-    }
-
-    #[test]
-    fn ambiguous_preformatted() {
-        let _ = pretty_env_logger::try_init();
-        let msg = include_str!("../testdata/ambig_preformatted.gmi");
-        let expected: Vec<Node> = vec![
-            Node::Preformatted("FOO".to_string()),
-            Node::Text("Foo bar".to_string()),
-        ];
-        assert_eq!(expected, parse(msg));
-    }
-}
+pub use gemtext::*;