From 5533699ec5824c8df3c6a9a0fac05a058a626de2 Mon Sep 17 00:00:00 2001
From: Peter Dave Hello <hsu@peterdavehello.org>
Date: Fri, 30 Jan 2026 00:04:01 +0800
Subject: [PATCH] Improve uninstall error message for missing versions

Include the requested version in the uninstall error output when

the target is not installed.

Add a fast test to lock the behavior.

Close #3767
---
 nvm.sh                                         |  8 +++++++-
 ...inferred version shows the inferred message | 18 ++++++++++++++++++
 ...stalled version shows the requested version | 13 +++++++++++++
 ...-exec' should display required node version |  1 -
 4 files changed, 38 insertions(+), 2 deletions(-)
 create mode 100755 test/fast/Running 'nvm uninstall' with an inferred version shows the inferred message
 create mode 100755 test/fast/Running 'nvm uninstall' with an uninstalled version shows the requested version

diff --git a/nvm.sh b/nvm.sh
index 4e8448e..9107746 100755
--- a/nvm.sh
+++ b/nvm.sh
@@ -3750,7 +3750,13 @@ nvm() {
       fi
 
       if ! nvm_is_version_installed "${VERSION}"; then
-        nvm_err "${VERSION} version is not installed..."
+        local REQUESTED_VERSION
+        REQUESTED_VERSION="${PATTERN}"
+        if [ "_${VERSION}" != "_N/A" ] && [ "_${VERSION}" != "_${PATTERN}" ]; then
+          nvm_err "Version '${VERSION}' (inferred from ${PATTERN}) is not installed."
+        else
+          nvm_err "Version '${REQUESTED_VERSION}' is not installed."
+        fi
         return
       fi
 
diff --git a/test/fast/Running 'nvm uninstall' with an inferred version shows the inferred message b/test/fast/Running 'nvm uninstall' with an inferred version shows the inferred message
new file mode 100755
index 0000000..2a08076
--- /dev/null
+++ b/test/fast/Running 'nvm uninstall' with an inferred version shows the inferred message	
@@ -0,0 +1,18 @@
+#!/bin/sh
+
+set -ex
+
+\. ../../nvm.sh
+\. ../common.sh
+
+VERSION='v0.0.1'
+PATTERN='0.0'
+
+mkdir -p "${NVM_DIR}/${VERSION}"
+
+set +ex # needed for stderr
+RETURN_MESSAGE="$(nvm uninstall "${PATTERN}" 2>&1 || echo)"
+set -ex
+EXPECTED_MESSAGE="Version '${VERSION}' (inferred from ${PATTERN}) is not installed."
+
+[ "${RETURN_MESSAGE}" = "${EXPECTED_MESSAGE}" ]
diff --git a/test/fast/Running 'nvm uninstall' with an uninstalled version shows the requested version b/test/fast/Running 'nvm uninstall' with an uninstalled version shows the requested version
new file mode 100755
index 0000000..25ba202
--- /dev/null
+++ b/test/fast/Running 'nvm uninstall' with an uninstalled version shows the requested version	
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+set -ex
+
+\. ../../nvm.sh
+\. ../common.sh
+
+set +ex # needed for stderr
+RETURN_MESSAGE="$(nvm uninstall 22 2>&1 || echo)"
+set -ex
+EXPECTED_MESSAGE="Version '22' is not installed."
+
+[ "${RETURN_MESSAGE}" = "${EXPECTED_MESSAGE}" ]
diff --git a/test/fast/Running 'nvm-exec' should display required node version b/test/fast/Running 'nvm-exec' should display required node version
index 1aef91b..0d24e56 100755
--- a/test/fast/Running 'nvm-exec' should display required node version	
+++ b/test/fast/Running 'nvm-exec' should display required node version	
@@ -5,7 +5,6 @@ set -x
 \. ../../nvm.sh
 
 cleanup() { rm -f .nvmrc; }
-
 die () { echo "$@" ; cleanup ; exit 1; }
 
 NVM_TEST_VERSION=v0.42