Make a handlebars helper that uses prlink to generate a link from a file

Cargo.lock

@@ -6,16 +6,112 @@ dependencies = [
  "memchr 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
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+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
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+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "bitflags"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
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+[[package]]
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+version = "2.30.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+ "textwrap 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
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+ "vec_map 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
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+
 [[package]]
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+name = "encoding-index-simpchinese"
+version = "1.20141219.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "encoding_index_tests 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "encoding-index-singlebyte"
+version = "1.20141219.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "encoding_index_tests 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
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+name = "encoding-index-tradchinese"
+version = "1.20141219.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "encoding_index_tests 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "encoding_index_tests"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "glob"
+version = "0.2.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "handlebars"
 version = "0.32.0"
@@ -31,6 +127,16 @@ dependencies = [
  "serde_json 1.0.10 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "idna"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "matches 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-bidi 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-normalization 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "itoa"
 version = "0.3.4"
@@ -54,6 +160,11 @@ dependencies = [
  "cfg-if 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "matches"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "memchr"
 version = "2.0.1"
@@ -67,6 +178,11 @@ name = "num-traits"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "percent-encoding"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "pest"
 version = "1.0.6"
@@ -82,6 +198,16 @@ dependencies = [
  "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "prlink"
+version = "0.1.0"
+source = "git+https://github.com/integer32llc/prlink#5ff5420acb5076025527fdeb1be4a3b34dca6541"
+dependencies = [
+ "clap 2.30.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "glob 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "quick-error"
 version = "1.2.1"
@@ -92,6 +218,19 @@ name = "quote"
 version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "redox_syscall"
+version = "0.1.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "redox_termios"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "redox_syscall 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "regex"
 version = "0.2.6"
@@ -114,6 +253,7 @@ name = "rustlings"
 version = "0.1.0"
 dependencies = [
  "handlebars 0.32.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "prlink 0.1.0 (git+https://github.com/integer32llc/prlink)",
  "serde_json 1.0.10 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -133,6 +273,11 @@ dependencies = [
  "serde 1.0.27 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "strsim"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "syn"
 version = "0.11.11"
@@ -151,6 +296,24 @@ dependencies = [
  "unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "termion"
+version = "1.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
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+
+[[package]]
+name = "textwrap"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "unicode-width 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "thread_local"
 version = "0.3.5"
@@ -160,6 +323,24 @@ dependencies = [
  "unreachable 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "unicode-bidi"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "matches 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
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+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "unicode-xid"
 version = "0.0.4"
@@ -173,39 +354,103 @@ dependencies = [
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+version = "1.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+"checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

Cargo.toml

@@ -6,3 +6,4 @@ authors = ["Carol (Nichols || Goulding) <carol.nichols@gmail.com>"]
 [dependencies]
 handlebars = "0.32.0"
 serde_json = "1.0.10"
+prlink = { git = "https://github.com/integer32llc/prlink" }

README.md

@@ -145,7 +145,6 @@ relevant.
 
 - ["arc1.rs"](https://play.rust-lang.org/?code=%2F%2F+arc1.rs%0A%2F%2F+Make+this+code+compile+by+filling+in+a+value+for+%60shared_numbers%60+where+the%0A%2F%2F+TODO+comment+is+and+creating+an+initial+binding+for+%60child_numbers%60%0A%2F%2F+somewhere.+Try+not+to+create+any+copies+of+the+%60numbers%60+Vec%21%0A%2F%2F+Scroll+down+for+hints+%3A%29%0A%0Ause+std%3A%3Async%3A%3AArc%3B%0Ause+std%3A%3Athread%3B%0A%0Afn+main%28%29+%7B%0A++++let+numbers%3A+Vec%3C_%3E+%3D+%280..100u32%29.collect%28%29%3B%0A++++let+shared_numbers+%3D+%2F%2F+TODO%0A++++let+mut+joinhandles+%3D+Vec%3A%3Anew%28%29%3B%0A%0A++++for+offset+in+0..8+%7B%0A++++++++joinhandles.push%28%0A++++++++thread%3A%3Aspawn%28move+%7C%7C+%7B%0A++++++++++++let+mut+i+%3D+offset%3B%0A++++++++++++let+mut+sum+%3D+0%3B%0A++++++++++++while+i+%3C+child_numbers.len%28%29+%7B%0A++++++++++++++++sum+%2B%3D+child_numbers%5Bi%5D%3B%0A++++++++++++++++i+%2B%3D+5%3B%0A++++++++++++%7D%0A++++++++++++println%21%28%22Sum+of+offset+%7B%7D+is+%7B%7D%22%2C+offset%2C+sum%29%3B%0A++++++++%7D%29%29%3B%0A++++%7D%0A++++for+handle+in+joinhandles.into_iter%28%29+%7B%0A++++++++handle.join%28%29.unwrap%28%29%3B%0A++++%7D%0A%7D%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%0A%2F%2F+Make+%60shared_numbers%60+be+an+%60Arc%60+from+the+numbers+vector.+Then%2C+in+order%0A%2F%2F+to+avoid+creating+a+copy+of+%60numbers%60%2C+you%27ll+need+to+create+%60child_numbers%60%0A%2F%2F+inside+the+loop+but+still+in+the+main+thread.%0A%0A%2F%2F+%60child_numbers%60+should+be+a+clone+of+the+Arc+of+the+numbers+instead+of+a%0A%2F%2F+thread-local+copy+of+the+numbers.%0A)
 
-
 #### Iterators
 
 Do not adjust your monitors-- iterators 1 and 2 are indeed missing. Iterator 3 is a bit challenging

src/bin/generate_readme.rs

@@ -7,13 +7,15 @@
 // README.md.
 
 extern crate handlebars;
+extern crate prlink;
 #[macro_use]
 extern crate serde_json;
 
-use handlebars::Handlebars;
+use handlebars::{Handlebars, Helper, RenderContext, RenderError};
 
 use std::fs::File;
 use std::io::prelude::*;
+use std::path::PathBuf;
 
 fn main() {
     let template = include_str!("../../README-template.hbs");
@@ -23,7 +25,9 @@ order to make changes here rather than committing the changes directly.";
 
     let mut generated_readme = File::create("README.md").unwrap();
 
-    let hbs = Handlebars::new();
+    let mut hbs = Handlebars::new();
+    hbs.register_helper("playground_link", Box::new(playground_link_helper));
+
     write!(
         generated_readme,
         "{}",
@@ -33,3 +37,10 @@ order to make changes here rather than committing the changes directly.";
         ).unwrap()
     ).unwrap();
 }
+
+fn playground_link_helper(h: &Helper, _: &Handlebars, rc: &mut RenderContext) -> Result<(), RenderError> {
+    let filename = PathBuf::from(h.param(0).unwrap().value().as_str().unwrap());
+    let link = prlink::linkify_file(&filename);
+    rc.writer.write(link.into_bytes().as_ref())?;
+    Ok(())
+}