discovery: prevent dup OLLAMA_LIBRARY_PATH (#12514)

This variable isn't currently documented or intended as something the user can
override, but if the user happens to set OLLAMA_LIBRARY_PATH we were doubling
this in the subprocess environment which will cause problems with the new
bootstrap discovery logic.

discover/runner.go

@@ -442,15 +442,18 @@ func bootstrapDevices(ctx context.Context, ollamaLibDirs []string, extraEnvs []s
 		cmd.Stderr = os.Stderr
 	}
 	// cmd.SysProcAttr = llm.LlamaServerSysProcAttr // circular dependency - bring back once refactored
-	cmd.Env = append(cmd.Env, "OLLAMA_LIBRARY_PATH="+strings.Join(ollamaLibDirs, string(filepath.ListSeparator)))
 	pathEnvVal := strings.Join(libraryPaths, string(filepath.ListSeparator))
 	pathNeeded := true
+	ollamaPathNeeded := true
 	extraDone := make([]bool, len(extraEnvs))
 	for i := range cmd.Env {
 		cmp := strings.SplitN(cmd.Env[i], "=", 2)
 		if strings.EqualFold(cmp[0], pathEnv) {
 			cmd.Env[i] = pathEnv + "=" + pathEnvVal
 			pathNeeded = false
+		} else if strings.EqualFold(cmp[0], "OLLAMA_LIBRARY_PATH") {
+			cmd.Env[i] = "OLLAMA_LIBRARY_PATH=" + strings.Join(ollamaLibDirs, string(filepath.ListSeparator))
+			ollamaPathNeeded = false
 		} else {
 			for j := range extraEnvs {
 				if extraDone[j] {
@@ -467,6 +470,9 @@ func bootstrapDevices(ctx context.Context, ollamaLibDirs []string, extraEnvs []s
 	if pathNeeded {
 		cmd.Env = append(cmd.Env, pathEnv+"="+pathEnvVal)
 	}
+	if ollamaPathNeeded {
+		cmd.Env = append(cmd.Env, "OLLAMA_LIBRARY_PATH="+strings.Join(ollamaLibDirs, string(filepath.ListSeparator)))
+	}
 	for i := range extraDone {
 		if !extraDone[i] {
 			cmd.Env = append(cmd.Env, extraEnvs[i])

llm/server.go

@@ -359,20 +359,22 @@ func NewLlamaServer(gpus discover.GpuInfoList, modelPath string, f *ggml.GGML, a
 		s.cmd.Stderr = s.status
 		s.cmd.SysProcAttr = LlamaServerSysProcAttr
 
-		s.cmd.Env = append(s.cmd.Env, "OLLAMA_LIBRARY_PATH="+strings.Join(ggmlPaths, string(filepath.ListSeparator)))
-
 		// Always filter down the set of GPUs in case there are any unsupported devices that might crash
 		envWorkarounds := gpus.GetVisibleDevicesEnv()
 		pathEnvVal := strings.Join(libraryPaths, string(filepath.ListSeparator))
 
 		// Update or add the path variable with our adjusted version
 		pathNeeded := true
+		ollamaPathNeeded := true
 		envWorkaroundDone := make([]bool, len(envWorkarounds))
 		for i := range s.cmd.Env {
 			cmp := strings.SplitN(s.cmd.Env[i], "=", 2)
 			if strings.EqualFold(cmp[0], pathEnv) {
 				s.cmd.Env[i] = pathEnv + "=" + pathEnvVal
 				pathNeeded = false
+			} else if strings.EqualFold(cmp[0], "OLLAMA_LIBRARY_PATH") {
+				s.cmd.Env[i] = "OLLAMA_LIBRARY_PATH=" + strings.Join(ggmlPaths, string(filepath.ListSeparator))
+				ollamaPathNeeded = false
 			} else if len(envWorkarounds) != 0 {
 				for j, kv := range envWorkarounds {
 					tmp := strings.SplitN(kv, "=", 2)
@@ -386,6 +388,9 @@ func NewLlamaServer(gpus discover.GpuInfoList, modelPath string, f *ggml.GGML, a
 		if pathNeeded {
 			s.cmd.Env = append(s.cmd.Env, pathEnv+"="+pathEnvVal)
 		}
+		if ollamaPathNeeded {
+			s.cmd.Env = append(s.cmd.Env, "OLLAMA_LIBRARY_PATH="+strings.Join(ggmlPaths, string(filepath.ListSeparator)))
+		}
 		for i, done := range envWorkaroundDone {
 			if !done {
 				s.cmd.Env = append(s.cmd.Env, envWorkarounds[i])