setup subplot running

Sponsored-by: author

8 files changed, 62 insertions, 4 deletions

diff --git a/Cargo.toml b/Cargo.toml
index aac776d..765dec7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,4 +5,9 @@ edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
-[dependencies]
+[dev-dependencies]
+subplotlib = { path = "/home/liw/pers/subplot/git/subplotlib" }
+fehler = "1.0.0"
+
+[build-dependencies]
+subplot-build = { path = "/home/liw/pers/subplot/git/subplot-build" }
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..04c4671
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,7 @@
+use std::path::Path;
+
+fn main() {
+    println!("cargo:rerun-if-changed=build.rs");
+    subplot_build::codegen(Path::new("cachedir.md"))
+        .expect("failed to generate code with Subplot");
+}
diff --git a/cachedir.md b/cachedir.md
index b0646c0..2f2607a 100644
--- a/cachedir.md
+++ b/cachedir.md
@@ -1,10 +1,13 @@
 ---
 title: "`cachedir`—cache directory tag management"
 author: The Obnam project
-template: rust
 bindings:
   - lib/files.yaml
   - lib/runcmd.yaml
+  - subplot.yaml
+impls:
+  rust:
+  - subplot.rs
 ...
 
 # Introduction
@@ -34,7 +37,7 @@ the other isn't.
 ~~~{#CACHEDIR.TAG .file}
 Signature: 8a477f597d28d172789f06886806bc55
 ~~~
-~~~{#not-a-cache .file}
+~~~{#not-a-tag .file}
 This is not a cache directory tag.
 ~~~
 
@@ -46,7 +49,8 @@ tags as requested._
 
 We should find no cache directories, if there aren't any.
 
-given an installed cachedir program
+
+given an installed cachedir
 
 ~~~scenario
 when I run cachedir find .
diff --git a/src/main.rs b/src/bin/cachedir.rs
index e7a11a9..e7a11a9 100644
--- a/src/main.rs
+++ b/src/bin/cachedir.rs
diff --git a/src/cachedir.rs b/src/cachedir.rs
new file mode 100644
index 0000000..e7a11a9
--- /dev/null
+++ b/src/cachedir.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}
diff --git a/subplot.rs b/subplot.rs
new file mode 100644
index 0000000..e70ea83
--- /dev/null
+++ b/subplot.rs
@@ -0,0 +1,34 @@
+// Rust support for running sq-subplot.md scenarios.
+
+use subplotlib::steplibrary::runcmd::Runcmd;
+
+use std::path::Path;
+
+#[step]
+#[context(Runcmd)]
+fn install_cachedir(context: &ScenarioContext) {
+    // The CACHEDIR_DIR variable can be set to test an installed
+    // cachedir rather than the one built from the source tree.
+    if let Some(bindir) = std::env::var_os("CACHEDIR_DIR") {
+        println!("Found CACHEDIR_DIR environment variable, using that");
+        context.with_mut(
+            |rc: &mut Runcmd| {
+                rc.prepend_to_path(bindir);
+                Ok(())
+            },
+            false,
+        )?;
+    } else {
+        let target_exe = env!("CARGO_BIN_EXE_cachedir");
+        let target_path = Path::new(target_exe);
+        let target_path = target_path.parent().ok_or("No parent?")?;
+
+        context.with_mut(
+            |context: &mut Runcmd| {
+                context.prepend_to_path(target_path);
+                Ok(())
+            },
+            false,
+        )?;
+    }
+}
diff --git a/subplot.yaml b/subplot.yaml
new file mode 100644
index 0000000..3231cc3
--- /dev/null
+++ b/subplot.yaml
@@ -0,0 +1,4 @@
+- given: "an installed cachedir"
+  impl:
+    rust:
+      function: install_cachedir
diff --git a/tests/subplot.rs b/tests/subplot.rs
new file mode 100644
index 0000000..2247dac
--- /dev/null
+++ b/tests/subplot.rs
@@ -0,0 +1 @@
+include!(concat!(env!("OUT_DIR"), "/cachedir.rs"));