feat: create and initialise a new journal

At the moment this only creates a new directory, but most of the
change is scaffolding so that more interesting changes can be built on
top of this later.

2 files changed, 55 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1 @@
+
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..0a7efe1
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,54 @@
+use anyhow::Result;
+use std::fs;
+use std::path::{Path, PathBuf};
+use structopt::StructOpt;
+use thiserror::Error;
+
+#[derive(Debug, StructOpt)]
+#[structopt(about = "maintain a journal")]
+enum JT {
+    Init {
+        #[structopt(help = "Directory where journal should be stored")]
+        dirname: PathBuf,
+        #[structopt(help = "Short name for journal")]
+        journalname: String,
+        #[structopt(help = "Short description of journal, its title")]
+        description: String,
+    },
+    IsJournal {
+        #[structopt(help = "Directory that may or may not be a journal")]
+        dirname: PathBuf,
+    },
+}
+
+#[derive(Debug, Error)]
+enum JournalError {
+    #[error("directory {0} is not a journal")]
+    NotAJournal(String),
+}
+
+fn main() -> Result<()> {
+    let opt = JT::from_args();
+    match opt {
+        JT::Init {
+            dirname,
+            journalname,
+            description,
+        } => init(&dirname, &journalname, &description)?,
+        JT::IsJournal { dirname } => is_journal(&dirname)?,
+    }
+    Ok(())
+}
+
+fn init(dirname: &Path, _journalname: &str, _description: &str) -> anyhow::Result<()> {
+    std::fs::create_dir(dirname)?;
+    Ok(())
+}
+
+fn is_journal(dirname: &Path) -> anyhow::Result<()> {
+    let meta = fs::symlink_metadata(dirname)?;
+    if !meta.is_dir() {
+        return Err(JournalError::NotAJournal(dirname.to_string_lossy().to_string()).into());
+    }
+    Ok(())
+}