rage: Install Elvish completions in Debian package

These are not automatically discovered, but installing the files means that Elvish users can import them.
str4d · Jan 20, 2024 · 857f2ec · 857f2ec
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diff --git a/rage/CHANGELOG.md b/rage/CHANGELOG.md
@@ -11,6 +11,8 @@ to 1.0.0 are beta releases.
 ## [Unreleased]
 ### Added
 - `rage-keygen -y IDENTITY_FILE` to convert identity files to recipients.
+- Elvish completions to the Debian package. These are not automatically
+  discovered; Elvish users will need to manually import them.
 
 ### Changed
 - MSRV is now 1.65.0.

diff --git a/rage/Cargo.toml b/rage/Cargo.toml
@@ -38,6 +38,24 @@ assets = [
     ["target/release/completions/rage-keygen.bash", "usr/share/bash-completion/completions/rage-keygen", "644"],
     ["target/release/completions/rage-mount.bash", "usr/share/bash-completion/completions/rage-mount", "644"],
 
+    # From https://github.com/elves/elvish/issues/1564#issuecomment-1166333636:
+    # > Completion files can be installed like other modules into a global module search
+    # > directory ([..]). There is no automatic discovery of completion files though; the
+    # > user would have to import them manually with `use`.
+    #
+    # From https://elv.sh/ref/command.html#module-search-directories:
+    # > When importing modules, Elvish searches the following directories:
+    # > [..]
+    # > 3. If the XDG_DATA_DIRS environment variable is defined and non-empty, it is
+    # >    treated as a colon-delimited list of paths (semicolon-delimited on Windows),
+    # >    which are all searched.
+    # >
+    # >    Otherwise, `/usr/local/share/elvish/lib` and `/usr/share/elvish/lib` are
+    # >    searched on non-Windows OSes.
+    ["target/release/completions/rage.elv", "usr/share/elvish/lib/", "644"],
+    ["target/release/completions/rage-keygen.elv", "usr/share/elvish/lib/", "644"],
+    ["target/release/completions/rage-mount.elv", "usr/share/elvish/lib/", "644"],
+
     # From https://fishshell.com/docs/current/completions.html#where-to-put-completions:
     # > By default, Fish searches the following for completions, using the first available
     # > file that it finds: