Rename DEVLOG_HOME env var to DEVLOG_REPO

Author: wedaly

docs/guide.html

@@ -32,7 +32,7 @@ <h2>install</h2>
                 <h2>create</h2>
                 <p>To create a new repository for your devlogs:</p>
                 <pre>devlog init</pre>
-                <p>By default, devlogs are stored in the directory at <code>$HOME/devlogs</code>.  You can choose a different directory by setting the <code>DEVLOG_HOME</code> environment variable.</p>
+                <p>By default, devlogs are stored in the directory at <code>$HOME/devlogs</code>.  You can choose a different directory by setting the <code>DEVLOG_REPO</code> environment variable.</p>
                 <p>Examining the repository directory, you'll see a file called <code>000000001.devlog</code>.  This is your first devlog entry.  It's just a text file.</p>
             </section>
 
@@ -116,8 +116,8 @@ <h3>shell scripts</h3>
 
 
                 <h3>hooks</h3>
-                <p>Devlog can be extended through a mechanism called "hooks".  A <i>hook</i> is an executable file located in the <code>$DEVLOG_HOME/hooks</code> directory.  To enable a hook, make the file executable, like this:</p>
-                <pre>chmod +x $DEVLOG_HOME/hooks/before-edit</pre>
+                <p>Devlog can be extended through a mechanism called "hooks".  A <i>hook</i> is an executable file located in the <code>$DEVLOG_REPO/hooks</code> directory.  To enable a hook, make the file executable, like this:</p>
+                <pre>chmod +x $DEVLOG_REPO/hooks/before-edit</pre>
 
                 <p>The following hooks are available:</p>
                 <table>

src/bin/devlog.rs

@@ -10,7 +10,7 @@ use std::process::exit;
 const VERSION: &'static str = env!("CARGO_PKG_VERSION");
 
 const MAIN_INFO: &'static str =
-    "Devlog files are created in the directory at $DEVLOG_HOME, which defaults to $HOME/devlogs if not set.";
+    "Devlog files are created in the directory at $DEVLOG_REPO, which defaults to $HOME/devlogs if not set.";
 
 const EDIT_INFO: &'static str =
     "Uses the editor program $DEVLOG_EDITOR, which defaults to nano if not set.";

src/config.rs

@@ -4,7 +4,7 @@ use dirs;
 use std::env;
 use std::path::{Path, PathBuf};
 
-const DEVLOG_HOME_ENV_VAR: &'static str = "DEVLOG_HOME";
+const DEVLOG_REPO_ENV_VAR: &'static str = "DEVLOG_REPO";
 const DEFAULT_HOME_DIR: &'static str = "devlogs";
 const EDITOR_ENV_VAR: &'static str = "DEVLOG_EDITOR";
 const DEFAULT_EDITOR: &'static str = "nano";
@@ -27,7 +27,7 @@ impl Config {
     /// Load configuration from environment variables,
     /// providing defaults if the environment variables are not defined.
     pub fn load() -> Config {
-        let repo_dir_str = env::var(DEVLOG_HOME_ENV_VAR)
+        let repo_dir_str = env::var(DEVLOG_REPO_ENV_VAR)
             .ok()
             .unwrap_or_else(default_repo_dir);
         let repo_dir = PathBuf::from(repo_dir_str);