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create hook: version-name

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Expose a `version-name` hook.

It is invoked *after* the traditional `RBENV_VERSION` lookup. Which means hook scripts can interrogate `$RBENV_VERSION_FILE` and/or `$RBENV_VERSION` (or use the executables).

The hooks are then run, giving plugins a chance to alter `RBENV_VERSION`. Once the hooks have run, we now have (in `$RBENV_VERSION`) the actual version we want to use (or it's empty which defaults to `system` per normal). Lastly, the same logic remains for checking if the version exists, or trimming the `ruby-` prefix.

Prime example: the ruby-bundler-ruby-version plugin can select a ruby by using the `ruby` directive from the `Gemfile` if a local `.ruby-version` doesn't exist.
This commit is contained in:
Jason Karns
2015-05-27 23:10:39 -04:00
committed by Mislav Marohnić
parent 5b9e4f0584
commit 258e4413b1
2 changed files with 26 additions and 0 deletions
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libexec/rbenv-version-name
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@@ -8,6 +8,13 @@ if [ -z "$RBENV_VERSION" ]; then
RBENV_VERSION="$(rbenv-version-file-read "$RBENV_VERSION_FILE" || true)"
fi
OLDIFS="$IFS"
IFS=$'\n' scripts=(`rbenv-hooks version-name`)
IFS="$OLDIFS"
for script in "${scripts[@]}"; do
source "$script"
done
if [ -z "$RBENV_VERSION" ] || [ "$RBENV_VERSION" = "system" ]; then
echo "system"
exit