fix: --install-if-missing when using version alias (#484)

src/commands/use.rs

@@ -42,14 +42,13 @@ impl Command for Use {
             system_version::path()
         } else if let Some(alias_name) = requested_version.alias_name() {
             let alias_path = config.aliases_dir().join(&alias_name);
-            ensure!(
+            if alias_path.exists() {
-                alias_path.exists(),
-                CantFindVersion {
-                    version: requested_version
-                }
-            );
                 outln!(config#Info, "Using Node for alias {}", alias_name.cyan());
                 alias_path
+            } else {
+                install_new_version(requested_version, config, self.install_if_missing)?;
+                return Ok(());
+            }
         } else {
             let current_version = requested_version.to_version(&all_versions, &config);
             match current_version {
@@ -61,8 +60,25 @@ impl Command for Use {
                         .join("installation")
                 }
                 None => {
+                    install_new_version(requested_version, config, self.install_if_missing)?;
+                    return Ok(());
+                }
+            }
+        };
+
+        replace_symlink(&version_path, &multishell_path).context(SymlinkingCreationIssue)?;
+
+        Ok(())
+    }
+}
+
+fn install_new_version(
+    requested_version: UserVersion,
+    config: &FnmConfig,
+    install_if_missing: bool,
+) -> Result<(), Error> {
     ensure!(
-                        self.install_if_missing || should_install_interactively(&requested_version),
+        install_if_missing || should_install_interactively(&requested_version),
         CantFindVersion {
             version: requested_version
         }
@@ -75,21 +91,13 @@ impl Command for Use {
     .apply(config)
     .context(InstallError)?;
 
-                    Self {
+    Use {
         version: Some(UserVersionReader::Direct(requested_version)),
-                        install_if_missing: self.install_if_missing,
+        install_if_missing: true,
     }
     .apply(config)?;
 
     return Ok(());
-                }
-            }
-        };
-
-        replace_symlink(&version_path, &multishell_path).context(SymlinkingCreationIssue)?;
-
-        Ok(())
-    }
 }
 
 /// Tries to delete `from`, and then tries to symlink `from` to `to` anyway.

tests/feature_tests/mod.rs

@@ -200,3 +200,21 @@ mod matching_dotfiles {
             .then(test_node_version("v11.10.0"))
     });
 }
+
+mod use_alias_install_if_missing {
+    test_shell!(Bash, Zsh, Fish, PowerShell; {
+        EvalFnmEnv::default()
+            .then(WriteFile::new(".node-version", "lts/*"))
+            .then(Call::new("fnm", vec!["use", "--install-if-missing"]))
+            .then(OutputContains::new(Call::new("fnm", vec!["ls"]), "lts-latest"))
+    });
+}
+
+mod use_alias_not_installed {
+    test_shell!(Bash, Zsh, Fish, PowerShell; {
+        EvalFnmEnv::default()
+          .log_level(Some("error"))
+          .then(WriteFile::new(".node-version", "lts/*"))
+          .then(OutputContains::new(IgnoreErrors::new(GetStderr::new(Call::new("fnm", vec!["use"]))),  "Requested version lts-latest is not currently installed"))
+    });
+}

tests/feature_tests/snapshots/e2e__feature_tests__use_alias_install_if_missing__Bash.snap

@@ -0,0 +1,11 @@
+---
+source: tests/feature_tests/mod.rs
+expression: "&source.trim()"
+---
+set -e
+shopt -s expand_aliases
+
+eval "$(fnm env)"
+echo 'lts/*' > .node-version
+fnm use --install-if-missing
+fnm ls | grep lts-latest

tests/feature_tests/snapshots/e2e__feature_tests__use_alias_install_if_missing__Fish.snap

@@ -0,0 +1,8 @@
+---
+source: tests/feature_tests/mod.rs
+expression: "&source.trim()"
+---
+fnm env | source
+echo 'lts/*' > .node-version
+fnm use --install-if-missing
+fnm ls | grep lts-latest

tests/feature_tests/snapshots/e2e__feature_tests__use_alias_install_if_missing__PowerShell.snap

@@ -0,0 +1,9 @@
+---
+source: tests/feature_tests/mod.rs
+expression: "&source.trim()"
+---
+$ErrorActionPreference = "Stop"
+fnm env | Out-String | Invoke-Expression
+echo 'lts/*' > '.node-version'
+fnm use --install-if-missing
+$($__out__ = $(fnm ls | Select-String 'lts-latest'); echo $__out__; if ($__out__ -eq $null){ exit 1 } else { $__out__ })

tests/feature_tests/snapshots/e2e__feature_tests__use_alias_install_if_missing__Zsh.snap

@@ -0,0 +1,9 @@
+---
+source: tests/feature_tests/mod.rs
+expression: "&source.trim()"
+---
+set -e
+eval "$(fnm env)"
+echo 'lts/*' > .node-version
+fnm use --install-if-missing
+fnm ls | grep lts-latest

tests/feature_tests/snapshots/e2e__feature_tests__use_alias_not_installed__Bash.snap

@@ -0,0 +1,10 @@
+---
+source: tests/feature_tests/mod.rs
+expression: "&source.trim()"
+---
+set -e
+shopt -s expand_aliases
+
+eval "$(fnm --log-level='error' env)"
+echo 'lts/*' > .node-version
+fnm use 2>&1 | grep 'Requested version lts-latest is not currently installed'

tests/feature_tests/snapshots/e2e__feature_tests__use_alias_not_installed__Fish.snap

@@ -0,0 +1,7 @@
+---
+source: tests/feature_tests/mod.rs
+expression: "&source.trim()"
+---
+fnm --log-level='error' env | source
+echo 'lts/*' > .node-version
+fnm use 2>&1 | grep 'Requested version lts-latest is not currently installed'

tests/feature_tests/snapshots/e2e__feature_tests__use_alias_not_installed__PowerShell.snap

@@ -0,0 +1,8 @@
+---
+source: tests/feature_tests/mod.rs
+expression: "&source.trim()"
+---
+$ErrorActionPreference = "Stop"
+fnm --log-level='error' env | Out-String | Invoke-Expression
+echo 'lts/*' > '.node-version'
+$($__out__ = $($($_tmp_err_action = $ErrorActionPreference;$ErrorActionPreference = "Continue";fnm use 2>&1;$ErrorActionPreference = $_tmp_err_action) | Select-String 'Requested version lts-latest is not currently installed'); echo $__out__; if ($__out__ -eq $null){ exit 1 } else { $__out__ })

tests/feature_tests/snapshots/e2e__feature_tests__use_alias_not_installed__Zsh.snap

@@ -0,0 +1,8 @@
+---
+source: tests/feature_tests/mod.rs
+expression: "&source.trim()"
+---
+set -e
+eval "$(fnm --log-level='error' env)"
+echo 'lts/*' > .node-version
+fnm use 2>&1 | grep 'Requested version lts-latest is not currently installed'