Revamp the images template functions

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Breaking
 
 - Newlines are now required after the closing `+++` of front-matter
+- `resize_image` now returns a map: `{url, static_path}` instead of just the URL so you can follow up with other functions  
 - i18n rework: languages now have their sections in `config.toml` to set up all their options
   1. taxonomies don't have a `lang` anymore in the config, you need to declare them in their respective language section
   2. the `config` variable in templates has been changed and is now a stripped down language aware version of the previous `config`

Cargo.lock

@@ -1022,6 +1022,7 @@ dependencies = [
 name = "imageproc"
 version = "0.1.0"
 dependencies = [
+ "config",
  "errors",
  "image",
  "lazy_static",
@@ -2592,6 +2593,8 @@ dependencies = [
  "nom-bibtex",
  "rendering",
  "reqwest",
+ "serde",
+ "serde_derive",
  "serde_json",
  "sha2",
  "svg_metadata",

components/imageproc/Cargo.toml

@@ -10,7 +10,8 @@ regex = "1.0"
 tera = "1"
 image = "0.23"
 rayon = "1"
-webp="0.1.1"
+webp = "0.1.1"
 
 errors = { path = "../errors" }
 utils = { path = "../utils" }
+config = { path = "../config" }

components/imageproc/src/lib.rs

@@ -11,10 +11,12 @@ use lazy_static::lazy_static;
 use rayon::prelude::*;
 use regex::Regex;
 
+use config::Config;
 use errors::{Error, Result};
 use utils::fs as ufs;
 
 static RESIZED_SUBDIR: &str = "processed_images";
+const DEFAULT_Q_JPG: u8 = 75;
 
 lazy_static! {
     pub static ref RESIZED_FILENAME: Regex =
@@ -51,14 +53,12 @@ impl ResizeOp {
         match op {
             "fit_width" => {
                 if width.is_none() {
-                    return Err("op=\"fit_width\" requires a `width` argument".to_string().into());
+                    return Err("op=\"fit_width\" requires a `width` argument".into());
                 }
             }
             "fit_height" => {
                 if height.is_none() {
-                    return Err("op=\"fit_height\" requires a `height` argument"
+                    return Err("op=\"fit_height\" requires a `height` argument".into());
-                        .to_string()
-                        .into());
                 }
             }
             "scale" | "fit" | "fill" => {
@@ -132,8 +132,6 @@ impl Hash for ResizeOp {
         }
     }
 }
-const DEFAULT_Q_JPG: u8 = 75;
-
 /// Thumbnail image format
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum Format {
@@ -215,6 +213,7 @@ impl Hash for Format {
 #[derive(Debug, PartialEq, Eq)]
 pub struct ImageOp {
     source: String,
+    input_path: PathBuf,
     op: ResizeOp,
     format: Format,
     /// Hash of the above parameters
@@ -227,18 +226,9 @@ pub struct ImageOp {
 }
 
 impl ImageOp {
-    pub fn new(source: String, op: ResizeOp, format: Format) -> ImageOp {
-        let mut hasher = DefaultHasher::new();
-        hasher.write(source.as_ref());
-        op.hash(&mut hasher);
-        format.hash(&mut hasher);
-        let hash = hasher.finish();
-
-        ImageOp { source, op, format, hash, collision_id: 0 }
-    }
-
     pub fn from_args(
         source: String,
+        input_path: PathBuf,
         op: &str,
         width: Option<u32>,
         height: Option<u32>,
@@ -247,18 +237,24 @@ impl ImageOp {
     ) -> Result<ImageOp> {
         let op = ResizeOp::from_args(op, width, height)?;
         let format = Format::from_args(&source, format, quality)?;
-        Ok(Self::new(source, op, format))
+
+        let mut hasher = DefaultHasher::new();
+        hasher.write(source.as_ref());
+        op.hash(&mut hasher);
+        format.hash(&mut hasher);
+        let hash = hasher.finish();
+
+        Ok(ImageOp { source, input_path, op, format, hash, collision_id: 0 })
     }
 
-    fn perform(&self, content_path: &Path, target_path: &Path) -> Result<()> {
+    fn perform(&self, target_path: &Path) -> Result<()> {
         use ResizeOp::*;
 
-        let src_path = content_path.join(&self.source);
+        if !ufs::file_stale(&self.input_path, target_path) {
-        if !ufs::file_stale(&src_path, target_path) {
             return Ok(());
         }
 
-        let mut img = image::open(&src_path)?;
+        let mut img = image::open(&self.input_path)?;
         let (img_w, img_h) = img.dimensions();
 
         const RESIZE_FILTER: FilterType = FilterType::Lanczos3;
@@ -266,8 +262,8 @@ impl ImageOp {
 
         let img = match self.op {
             Scale(w, h) => img.resize_exact(w, h, RESIZE_FILTER),
-            FitWidth(w) => img.resize(w, u32::max_value(), RESIZE_FILTER),
+            FitWidth(w) => img.resize(w, u32::MAX, RESIZE_FILTER),
-            FitHeight(h) => img.resize(u32::max_value(), h, RESIZE_FILTER),
+            FitHeight(h) => img.resize(u32::MAX, h, RESIZE_FILTER),
             Fit(w, h) => {
                 if img_w > w || img_h > h {
                     img.resize(w, h, RESIZE_FILTER)
@@ -328,14 +324,15 @@ impl ImageOp {
     }
 }
 
-/// A strcture into which image operations can be enqueued and then performed.
+/// A struct into which image operations can be enqueued and then performed.
 /// All output is written in a subdirectory in `static_path`,
 /// taking care of file stale status based on timestamps and possible hash collisions.
 #[derive(Debug)]
 pub struct Processor {
-    content_path: PathBuf,
+    /// The base path of the Zola site
-    resized_path: PathBuf,
+    base_path: PathBuf,
-    resized_url: String,
+    base_url: String,
+    output_dir: PathBuf,
     /// A map of a ImageOps by their stored hash.
     /// Note that this cannot be a HashSet, because hashset handles collisions and we don't want that,
     /// we need to be aware of and handle collisions ourselves.
@@ -345,30 +342,18 @@ pub struct Processor {
 }
 
 impl Processor {
-    pub fn new(content_path: PathBuf, static_path: &Path, base_url: &str) -> Processor {
+    pub fn new(base_path: PathBuf, config: &Config) -> Processor {
         Processor {
-            content_path,
+            output_dir: base_path.join("static").join(RESIZED_SUBDIR),
-            resized_path: static_path.join(RESIZED_SUBDIR),
+            base_url: config.make_permalink(RESIZED_SUBDIR),
-            resized_url: Self::resized_url(base_url),
+            base_path,
             img_ops: HashMap::new(),
             img_ops_collisions: Vec::new(),
         }
     }
 
-    fn resized_url(base_url: &str) -> String {
+    pub fn set_base_url(&mut self, config: &Config) {
-        if base_url.ends_with('/') {
+        self.base_url = config.make_permalink(RESIZED_SUBDIR);
-            format!("{}{}", base_url, RESIZED_SUBDIR)
-        } else {
-            format!("{}/{}", base_url, RESIZED_SUBDIR)
-        }
-    }
-
-    pub fn set_base_url(&mut self, base_url: &str) {
-        self.resized_url = Self::resized_url(base_url);
-    }
-
-    pub fn source_exists(&self, source: &str) -> bool {
-        self.content_path.join(source).exists()
     }
 
     pub fn num_img_ops(&self) -> usize {
@@ -427,25 +412,25 @@ impl Processor {
         format!("{:016x}{:02x}.{}", hash, collision_id, format.extension())
     }
 
-    fn op_url(&self, hash: u64, collision_id: u32, format: Format) -> String {
+    /// Adds the given operation to the queue but do not process it immediately.
-        format!("{}/{}", &self.resized_url, Self::op_filename(hash, collision_id, format))
+    /// Returns (path in static folder, final URL).
-    }
+    pub fn insert(&mut self, img_op: ImageOp) -> (PathBuf, String) {
-
-    pub fn insert(&mut self, img_op: ImageOp) -> String {
         let hash = img_op.hash;
         let format = img_op.format;
         let collision_id = self.insert_with_collisions(img_op);
-        self.op_url(hash, collision_id, format)
+        let filename = Self::op_filename(hash, collision_id, format);
+        let url = format!("{}{}", self.base_url, filename);
+        (Path::new("static").join(RESIZED_SUBDIR).join(filename), url)
     }
 
     pub fn prune(&self) -> Result<()> {
         // Do not create folders if they don't exist
-        if !self.resized_path.exists() {
+        if !self.output_dir.exists() {
             return Ok(());
         }
 
-        ufs::ensure_directory_exists(&self.resized_path)?;
+        ufs::ensure_directory_exists(&self.output_dir)?;
-        let entries = fs::read_dir(&self.resized_path)?;
+        let entries = fs::read_dir(&self.output_dir)?;
         for entry in entries {
             let entry_path = entry?.path();
             if entry_path.is_file() {
@@ -466,15 +451,15 @@ impl Processor {
 
     pub fn do_process(&mut self) -> Result<()> {
         if !self.img_ops.is_empty() {
-            ufs::ensure_directory_exists(&self.resized_path)?;
+            ufs::ensure_directory_exists(&self.output_dir)?;
         }
 
         self.img_ops
             .par_iter()
             .map(|(hash, op)| {
                 let target =
-                    self.resized_path.join(Self::op_filename(*hash, op.collision_id, op.format));
+                    self.output_dir.join(Self::op_filename(*hash, op.collision_id, op.format));
-                op.perform(&self.content_path, &target)
+                op.perform(&target)
                     .map_err(|e| Error::chain(format!("Failed to process image: {}", op.source), e))
             })
             .collect::<Result<()>>()

components/library/src/content/mod.rs

@@ -3,11 +3,15 @@ mod page;
 mod section;
 mod ser;
 
+use std::fs::read_dir;
+use std::path::{Path, PathBuf};
+
 pub use self::file_info::FileInfo;
 pub use self::page::Page;
 pub use self::section::Section;
 pub use self::ser::{SerializingPage, SerializingSection};
 
+use config::Config;
 use rendering::Heading;
 
 pub fn has_anchor(headings: &[Heading], anchor: &str) -> bool {
@@ -23,9 +27,67 @@ pub fn has_anchor(headings: &[Heading], anchor: &str) -> bool {
     false
 }
 
+/// Looks into the current folder for the path and see if there's anything that is not a .md
+/// file. Those will be copied next to the rendered .html file
+pub fn find_related_assets(path: &Path, config: &Config) -> Vec<PathBuf> {
+    let mut assets = vec![];
+
+    for entry in read_dir(path).unwrap().filter_map(std::result::Result::ok) {
+        let entry_path = entry.path();
+        if entry_path.is_file() {
+            match entry_path.extension() {
+                Some(e) => match e.to_str() {
+                    Some("md") => continue,
+                    _ => assets.push(entry_path.to_path_buf()),
+                },
+                None => continue,
+            }
+        }
+    }
+
+    if let Some(ref globset) = config.ignored_content_globset {
+        // `find_related_assets` only scans the immediate directory (it is not recursive) so our
+        // filtering only needs to work against the file_name component, not the full suffix. If
+        // `find_related_assets` was changed to also return files in subdirectories, we could
+        // use `PathBuf.strip_prefix` to remove the parent directory and then glob-filter
+        // against the remaining path. Note that the current behaviour effectively means that
+        // the `ignored_content` setting in the config file is limited to single-file glob
+        // patterns (no "**" patterns).
+        assets = assets
+            .into_iter()
+            .filter(|path| match path.file_name() {
+                None => false,
+                Some(file) => !globset.is_match(file),
+            })
+            .collect();
+    }
+
+    assets
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
+    use std::fs::File;
+
+    use config::Config;
+    use tempfile::tempdir;
+
+    #[test]
+    fn can_find_related_assets() {
+        let tmp_dir = tempdir().expect("create temp dir");
+        File::create(tmp_dir.path().join("index.md")).unwrap();
+        File::create(tmp_dir.path().join("example.js")).unwrap();
+        File::create(tmp_dir.path().join("graph.jpg")).unwrap();
+        File::create(tmp_dir.path().join("fail.png")).unwrap();
+
+        let assets = find_related_assets(tmp_dir.path(), &Config::default());
+        assert_eq!(assets.len(), 3);
+        assert_eq!(assets.iter().filter(|p| p.extension().unwrap() != "md").count(), 3);
+        assert_eq!(assets.iter().filter(|p| p.file_name().unwrap() == "example.js").count(), 1);
+        assert_eq!(assets.iter().filter(|p| p.file_name().unwrap() == "graph.jpg").count(), 1);
+        assert_eq!(assets.iter().filter(|p| p.file_name().unwrap() == "fail.png").count(), 1);
+    }
 
     #[test]
     fn can_find_anchor_at_root() {

components/library/src/content/page.rs

@@ -12,14 +12,14 @@ use config::Config;
 use errors::{Error, Result};
 use front_matter::{split_page_content, InsertAnchor, PageFrontMatter};
 use rendering::{render_content, Heading, RenderContext};
-use utils::fs::{find_related_assets, read_file};
 use utils::site::get_reading_analytics;
+use utils::slugs::slugify_paths;
 use utils::templates::render_template;
 
 use crate::content::file_info::FileInfo;
-use crate::content::has_anchor;
 use crate::content::ser::SerializingPage;
-use utils::slugs::slugify_paths;
+use crate::content::{find_related_assets, has_anchor};
+use utils::fs::read_file;
 
 lazy_static! {
     // Based on https://regex101.com/r/H2n38Z/1/tests
@@ -43,7 +43,7 @@ pub struct Page {
     pub raw_content: String,
     /// All the non-md files we found next to the .md file
     pub assets: Vec<PathBuf>,
-    /// All the non-md files we found next to the .md file as string for use in templates
+    /// All the non-md files we found next to the .md file
     pub serialized_assets: Vec<String>,
     /// The HTML rendered of the page
     pub content: String,
@@ -216,27 +216,7 @@ impl Page {
 
         if page.file.name == "index" {
             let parent_dir = path.parent().unwrap();
-            let assets = find_related_assets(parent_dir);
+            page.assets = find_related_assets(parent_dir, config);
-
-            if let Some(ref globset) = config.ignored_content_globset {
-                // `find_related_assets` only scans the immediate directory (it is not recursive) so our
-                // filtering only needs to work against the file_name component, not the full suffix. If
-                // `find_related_assets` was changed to also return files in subdirectories, we could
-                // use `PathBuf.strip_prefix` to remove the parent directory and then glob-filter
-                // against the remaining path. Note that the current behaviour effectively means that
-                // the `ignored_content` setting in the config file is limited to single-file glob
-                // patterns (no "**" patterns).
-                page.assets = assets
-                    .into_iter()
-                    .filter(|path| match path.file_name() {
-                        None => false,
-                        Some(file) => !globset.is_match(file),
-                    })
-                    .collect();
-            } else {
-                page.assets = assets;
-            }
-
             page.serialized_assets = page.serialize_assets(&base_path);
         } else {
             page.assets = vec![];

components/library/src/content/section.rs

@@ -8,13 +8,13 @@ use config::Config;
 use errors::{Error, Result};
 use front_matter::{split_section_content, SectionFrontMatter};
 use rendering::{render_content, Heading, RenderContext};
-use utils::fs::{find_related_assets, read_file};
+use utils::fs::read_file;
 use utils::site::get_reading_analytics;
 use utils::templates::render_template;
 
 use crate::content::file_info::FileInfo;
-use crate::content::has_anchor;
 use crate::content::ser::SerializingSection;
+use crate::content::{find_related_assets, has_anchor};
 use crate::library::Library;
 
 // Default is used to create a default index section if there is no _index.md in the root content directory
@@ -36,7 +36,7 @@ pub struct Section {
     pub content: String,
     /// All the non-md files we found next to the .md file
     pub assets: Vec<PathBuf>,
-    /// All the non-md files we found next to the .md file as string for use in templates
+    /// All the non-md files we found next to the .md file as string
     pub serialized_assets: Vec<String>,
     /// All direct pages of that section
     pub pages: Vec<DefaultKey>,
@@ -122,27 +122,7 @@ impl Section {
         let mut section = Section::parse(path, &content, config, base_path)?;
 
         let parent_dir = path.parent().unwrap();
-        let assets = find_related_assets(parent_dir);
+        section.assets = find_related_assets(parent_dir, config);
-
-        if let Some(ref globset) = config.ignored_content_globset {
-            // `find_related_assets` only scans the immediate directory (it is not recursive) so our
-            // filtering only needs to work against the file_name component, not the full suffix. If
-            // `find_related_assets` was changed to also return files in subdirectories, we could
-            // use `PathBuf.strip_prefix` to remove the parent directory and then glob-filter
-            // against the remaining path. Note that the current behaviour effectively means that
-            // the `ignored_content` setting in the config file is limited to single-file glob
-            // patterns (no "**" patterns).
-            section.assets = assets
-                .into_iter()
-                .filter(|path| match path.file_name() {
-                    None => false,
-                    Some(file) => !globset.is_match(file),
-                })
-                .collect();
-        } else {
-            section.assets = assets;
-        }
-
         section.serialized_assets = section.serialize_assets();
 
         Ok(section)

components/site/src/lib.rs

@@ -85,8 +85,7 @@ impl Site {
 
         let content_path = path.join("content");
         let static_path = path.join("static");
-        let imageproc =
+        let imageproc = imageproc::Processor::new(path.to_path_buf(), &config);
-            imageproc::Processor::new(content_path.clone(), &static_path, &config.base_url);
         let output_path = path.join(config.output_dir.clone());
 
         let site = Site {
@@ -152,9 +151,9 @@ impl Site {
     }
 
     pub fn set_base_url(&mut self, base_url: String) {
-        let mut imageproc = self.imageproc.lock().expect("Couldn't lock imageproc (set_base_url)");
-        imageproc.set_base_url(&base_url);
         self.config.base_url = base_url;
+        let mut imageproc = self.imageproc.lock().expect("Couldn't lock imageproc (set_base_url)");
+        imageproc.set_base_url(&self.config);
     }
 
     pub fn set_output_path<P: AsRef<Path>>(&mut self, path: P) {

components/site/src/tpls.rs

@@ -21,11 +21,13 @@ pub fn register_early_global_fns(site: &mut Site) -> TeraResult<()> {
             vec![site.static_path.clone(), site.output_path.clone(), site.content_path.clone()],
         ),
     );
-    site.tera
+    site.tera.register_function(
-        .register_function("resize_image", global_fns::ResizeImage::new(site.imageproc.clone()));
+        "resize_image",
+        global_fns::ResizeImage::new(site.base_path.clone(), site.imageproc.clone()),
+    );
     site.tera.register_function(
         "get_image_metadata",
-        global_fns::GetImageMeta::new(site.content_path.clone()),
+        global_fns::GetImageMetadata::new(site.base_path.clone()),
     );
     site.tera.register_function("load_data", global_fns::LoadData::new(site.base_path.clone()));
     site.tera.register_function("trans", global_fns::Trans::new(site.config.clone()));

components/templates/Cargo.toml

@@ -11,7 +11,9 @@ lazy_static = "1"
 toml = "0.5"
 csv = "1"
 image = "0.23"
-serde_json = "1.0"
+serde = "1"
+serde_json = "1"
+serde_derive = "1"
 sha2 = "0.9"
 url = "2"
 nom-bibtex = "0.3"

components/templates/src/global_fns/images.rs

@@ -4,16 +4,31 @@ use std::path::PathBuf;
 use std::sync::{Arc, Mutex};
 
 use image::GenericImageView;
+use serde_derive::{Deserialize, Serialize};
 use svg_metadata as svg;
 use tera::{from_value, to_value, Error, Function as TeraFn, Result, Value};
 
+#[derive(Debug, Serialize, Deserialize)]
+struct ResizeImageResponse {
+    /// The final URL for that asset
+    url: String,
+    /// The path to the static asset generated
+    static_path: String,
+}
+
 #[derive(Debug)]
 pub struct ResizeImage {
+    /// The base path of the Zola site
+    base_path: PathBuf,
+    search_paths: [PathBuf; 2],
     imageproc: Arc<Mutex<imageproc::Processor>>,
 }
+
 impl ResizeImage {
-    pub fn new(imageproc: Arc<Mutex<imageproc::Processor>>) -> Self {
+    pub fn new(base_path: PathBuf, imageproc: Arc<Mutex<imageproc::Processor>>) -> Self {
-        Self { imageproc }
+        let search_paths =
+            [base_path.join("static").to_path_buf(), base_path.join("content").to_path_buf()];
+        Self { base_path, imageproc, search_paths }
     }
 }
 
@@ -22,7 +37,7 @@ static DEFAULT_FMT: &str = "auto";
 
 impl TeraFn for ResizeImage {
     fn call(&self, args: &HashMap<String, Value>) -> Result<Value> {
-        let path = required_arg!(
+        let mut path = required_arg!(
             String,
             args.get("path"),
             "`resize_image` requires a `path` argument with a string value"
@@ -53,45 +68,38 @@ impl TeraFn for ResizeImage {
         }
 
         let mut imageproc = self.imageproc.lock().unwrap();
-        if !imageproc.source_exists(&path) {
+        if path.starts_with("@/") {
+            path = path.replace("@/", "content/");
+        }
+
+        let mut file_path = self.base_path.join(&path);
+        let mut file_exists = file_path.exists();
+        if !file_exists {
+            // we need to search in both search folders now
+            for dir in &self.search_paths {
+                let p = dir.join(&path);
+                if p.exists() {
+                    file_path = p;
+                    file_exists = true;
+                    break;
+                }
+            }
+        }
+
+        if !file_exists {
             return Err(format!("`resize_image`: Cannot find path: {}", path).into());
         }
 
-        let imageop = imageproc::ImageOp::from_args(path, &op, width, height, &format, quality)
+        let imageop =
-            .map_err(|e| format!("`resize_image`: {}", e))?;
+            imageproc::ImageOp::from_args(path, file_path, &op, width, height, &format, quality)
-        let url = imageproc.insert(imageop);
+                .map_err(|e| format!("`resize_image`: {}", e))?;
+        let (static_path, url) = imageproc.insert(imageop);
 
-        to_value(url).map_err(|err| err.into())
+        to_value(ResizeImageResponse {
-    }
+            static_path: static_path.to_string_lossy().into_owned(),
-}
+            url,
-
+        })
-#[derive(Debug)]
+        .map_err(|err| err.into())
-pub struct GetImageMeta {
-    content_path: PathBuf,
-}
-
-impl GetImageMeta {
-    pub fn new(content_path: PathBuf) -> Self {
-        Self { content_path }
-    }
-}
-
-impl TeraFn for GetImageMeta {
-    fn call(&self, args: &HashMap<String, Value>) -> Result<Value> {
-        let path = required_arg!(
-            String,
-            args.get("path"),
-            "`get_image_metadata` requires a `path` argument with a string value"
-        );
-        let src_path = self.content_path.join(&path);
-        if !src_path.exists() {
-            return Err(format!("`get_image_metadata`: Cannot find path: {}", path).into());
-        }
-        let (height, width) = image_dimensions(&src_path)?;
-        let mut map = tera::Map::new();
-        map.insert(String::from("height"), Value::Number(tera::Number::from(height)));
-        map.insert(String::from("width"), Value::Number(tera::Number::from(width)));
-        Ok(Value::Object(map))
     }
 }
 
@@ -112,9 +120,163 @@ fn image_dimensions(path: &PathBuf) -> Result<(u32, u32)> {
     }
 }
 
+#[derive(Debug)]
+pub struct GetImageMetadata {
+    /// The base path of the Zola site
+    base_path: PathBuf,
+}
+
+impl GetImageMetadata {
+    pub fn new(base_path: PathBuf) -> Self {
+        Self { base_path }
+    }
+}
+
+impl TeraFn for GetImageMetadata {
+    fn call(&self, args: &HashMap<String, Value>) -> Result<Value> {
+        let mut path = required_arg!(
+            String,
+            args.get("path"),
+            "`get_image_metadata` requires a `path` argument with a string value"
+        );
+        if path.starts_with("@/") {
+            path = path.replace("@/", "content/");
+        }
+        let src_path = self.base_path.join(&path);
+        if !src_path.exists() {
+            return Err(format!("`get_image_metadata`: Cannot find path: {}", path).into());
+        }
+        let (height, width) = image_dimensions(&src_path)?;
+        let mut map = tera::Map::new();
+        map.insert(String::from("height"), Value::Number(tera::Number::from(height)));
+        map.insert(String::from("width"), Value::Number(tera::Number::from(width)));
+        Ok(Value::Object(map))
+    }
+}
+
 #[cfg(test)]
 mod tests {
-    use super::*;
+    use super::{GetImageMetadata, ResizeImage};
 
-    // TODO
+    use std::collections::HashMap;
+    use std::fs::{copy, create_dir_all};
+
+    use config::Config;
+    use std::sync::{Arc, Mutex};
+    use tempfile::{tempdir, TempDir};
+    use tera::{to_value, Function};
+
+    fn create_dir_with_image() -> TempDir {
+        let dir = tempdir().unwrap();
+        create_dir_all(dir.path().join("content").join("gallery")).unwrap();
+        create_dir_all(dir.path().join("static")).unwrap();
+        copy("gutenberg.jpg", dir.path().join("content").join("gutenberg.jpg")).unwrap();
+        copy("gutenberg.jpg", dir.path().join("content").join("gallery").join("asset.jpg"))
+            .unwrap();
+        copy("gutenberg.jpg", dir.path().join("static").join("gutenberg.jpg")).unwrap();
+        dir
+    }
+
+    // https://github.com/getzola/zola/issues/788
+    // https://github.com/getzola/zola/issues/1035
+    #[test]
+    fn can_resize_image() {
+        let dir = create_dir_with_image();
+        let imageproc = imageproc::Processor::new(dir.path().to_path_buf(), &Config::default());
+
+        let static_fn = ResizeImage::new(dir.path().to_path_buf(), Arc::new(Mutex::new(imageproc)));
+        let mut args = HashMap::new();
+        args.insert("height".to_string(), to_value(40).unwrap());
+        args.insert("width".to_string(), to_value(40).unwrap());
+
+        // hashing is stable based on filename and params so we can compare with hashes
+
+        // 1. resizing an image in static
+        args.insert("path".to_string(), to_value("static/gutenberg.jpg").unwrap());
+        let data = static_fn.call(&args).unwrap().as_object().unwrap().clone();
+        assert_eq!(
+            data["static_path"],
+            to_value("static/processed_images/e49f5bd23ec5007c00.jpg").unwrap()
+        );
+        assert_eq!(
+            data["url"],
+            to_value("http://a-website.com/processed_images/e49f5bd23ec5007c00.jpg").unwrap()
+        );
+
+        // 2. resizing an image in content with a relative path
+        args.insert("path".to_string(), to_value("content/gutenberg.jpg").unwrap());
+        let data = static_fn.call(&args).unwrap().as_object().unwrap().clone();
+        assert_eq!(
+            data["static_path"],
+            to_value("static/processed_images/32454a1e0243976c00.jpg").unwrap()
+        );
+        assert_eq!(
+            data["url"],
+            to_value("http://a-website.com/processed_images/32454a1e0243976c00.jpg").unwrap()
+        );
+
+        // 3. resizing an image in content starting with `@/`
+        args.insert("path".to_string(), to_value("@/gutenberg.jpg").unwrap());
+        let data = static_fn.call(&args).unwrap().as_object().unwrap().clone();
+        assert_eq!(
+            data["static_path"],
+            to_value("static/processed_images/32454a1e0243976c00.jpg").unwrap()
+        );
+        assert_eq!(
+            data["url"],
+            to_value("http://a-website.com/processed_images/32454a1e0243976c00.jpg").unwrap()
+        );
+
+        // 4. resizing an image with a relative path not starting with static or content
+        args.insert("path".to_string(), to_value("gallery/asset.jpg").unwrap());
+        let data = static_fn.call(&args).unwrap().as_object().unwrap().clone();
+        assert_eq!(
+            data["static_path"],
+            to_value("static/processed_images/c8aaba7b0593a60b00.jpg").unwrap()
+        );
+        assert_eq!(
+            data["url"],
+            to_value("http://a-website.com/processed_images/c8aaba7b0593a60b00.jpg").unwrap()
+        );
+
+        // 5. resizing with an absolute path
+        args.insert("path".to_string(), to_value("/content/gutenberg.jpg").unwrap());
+        assert!(static_fn.call(&args).is_err());
+    }
+
+    // TODO: consider https://github.com/getzola/zola/issues/1161
+    #[test]
+    fn can_get_image_metadata() {
+        let dir = create_dir_with_image();
+
+        let static_fn = GetImageMetadata::new(dir.path().to_path_buf());
+
+        // Let's test a few scenarii
+        let mut args = HashMap::new();
+
+        // 1. a call to something in `static` with a relative path
+        args.insert("path".to_string(), to_value("static/gutenberg.jpg").unwrap());
+        let data = static_fn.call(&args).unwrap().as_object().unwrap().clone();
+        assert_eq!(data["height"], to_value(380).unwrap());
+        assert_eq!(data["width"], to_value(300).unwrap());
+
+        // 2. a call to something in `static` with an absolute path is not handled currently
+        let mut args = HashMap::new();
+        args.insert("path".to_string(), to_value("/static/gutenberg.jpg").unwrap());
+        assert!(static_fn.call(&args).is_err());
+
+        // 3. a call to something in `content` with a relative path
+        let mut args = HashMap::new();
+        args.insert("path".to_string(), to_value("content/gutenberg.jpg").unwrap());
+        let data = static_fn.call(&args).unwrap().as_object().unwrap().clone();
+        assert_eq!(data["height"], to_value(380).unwrap());
+        assert_eq!(data["width"], to_value(300).unwrap());
+
+        // 4. a call to something in `content` with a @/ path corresponds to
+        let mut args = HashMap::new();
+        args.insert("path".to_string(), to_value("@/gutenberg.jpg").unwrap());
+        let data = static_fn.call(&args).unwrap().as_object().unwrap().clone();
+        assert_eq!(data["height"], to_value(380).unwrap());
+        assert_eq!(data["width"], to_value(300).unwrap());
+    }
 }

components/templates/src/global_fns/mod.rs

@@ -19,7 +19,7 @@ mod load_data;
 
 pub use self::content::{GetPage, GetSection, GetTaxonomy, GetTaxonomyUrl};
 pub use self::i18n::Trans;
-pub use self::images::{GetImageMeta, ResizeImage};
+pub use self::images::{GetImageMetadata, ResizeImage};
 pub use self::load_data::LoadData;
 
 #[derive(Debug)]

components/utils/src/fs.rs

@@ -1,5 +1,5 @@
 use filetime::{set_file_mtime, FileTime};
-use std::fs::{copy, create_dir_all, metadata, read_dir, File};
+use std::fs::{copy, create_dir_all, metadata, File};
 use std::io::prelude::*;
 use std::path::{Path, PathBuf};
 use std::time::SystemTime;
@@ -60,27 +60,6 @@ pub fn read_file(path: &Path) -> Result<String> {
     Ok(content)
 }
 
-/// Looks into the current folder for the path and see if there's anything that is not a .md
-/// file. Those will be copied next to the rendered .html file
-pub fn find_related_assets(path: &Path) -> Vec<PathBuf> {
-    let mut assets = vec![];
-
-    for entry in read_dir(path).unwrap().filter_map(std::result::Result::ok) {
-        let entry_path = entry.path();
-        if entry_path.is_file() {
-            match entry_path.extension() {
-                Some(e) => match e.to_str() {
-                    Some("md") => continue,
-                    _ => assets.push(entry_path.to_path_buf()),
-                },
-                None => continue,
-            }
-        }
-    }
-
-    assets
-}
-
 /// Copy a file but takes into account where to start the copy as
 /// there might be folders we need to create on the way.
 pub fn copy_file(src: &Path, dest: &PathBuf, base_path: &PathBuf, hard_link: bool) -> Result<()> {
@@ -204,25 +183,9 @@ mod tests {
     use std::path::PathBuf;
     use std::str::FromStr;
 
-    use tempfile::{tempdir, tempdir_in};
+    use tempfile::tempdir_in;
 
-    use super::{copy_file, find_related_assets};
+    use super::copy_file;
-
-    #[test]
-    fn can_find_related_assets() {
-        let tmp_dir = tempdir().expect("create temp dir");
-        File::create(tmp_dir.path().join("index.md")).unwrap();
-        File::create(tmp_dir.path().join("example.js")).unwrap();
-        File::create(tmp_dir.path().join("graph.jpg")).unwrap();
-        File::create(tmp_dir.path().join("fail.png")).unwrap();
-
-        let assets = find_related_assets(tmp_dir.path());
-        assert_eq!(assets.len(), 3);
-        assert_eq!(assets.iter().filter(|p| p.extension().unwrap() != "md").count(), 3);
-        assert_eq!(assets.iter().filter(|p| p.file_name().unwrap() == "example.js").count(), 1);
-        assert_eq!(assets.iter().filter(|p| p.file_name().unwrap() == "graph.jpg").count(), 1);
-        assert_eq!(assets.iter().filter(|p| p.file_name().unwrap() == "fail.png").count(), 1);
-    }
 
     #[test]
     fn test_copy_file_timestamp_preserved() {