From 358bc55dad5ef99c4a86054ff0b1d56b83e423a2 Mon Sep 17 00:00:00 2001
From: Christian Guinard <28689358+christiangnrd@users.noreply.github.com>
Date: Mon, 23 Sep 2024 22:00:35 -0300
Subject: [PATCH 1/3] Fix #55850

---
 stdlib/REPL/src/Pkg_beforeload.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/stdlib/REPL/src/Pkg_beforeload.jl b/stdlib/REPL/src/Pkg_beforeload.jl
index ebd0cd255ce19..472fbc924668d 100644
--- a/stdlib/REPL/src/Pkg_beforeload.jl
+++ b/stdlib/REPL/src/Pkg_beforeload.jl
@@ -88,7 +88,7 @@ function projname(project_file::String)
     end
     for depot in Base.DEPOT_PATH
         envdir = joinpath(depot, "environments")
-        if startswith(abspath(project_file), abspath(envdir))
+        if startswith(safe_realpath(project_file), safe_realpath(envdir))
             return "@" * name
         end
     end

From 1cda5564e3b776669c91da6363bf63cac79d8025 Mon Sep 17 00:00:00 2001
From: Christian Guinard <28689358+christiangnrd@users.noreply.github.com>
Date: Tue, 24 Sep 2024 00:03:27 -0300
Subject: [PATCH 2/3] Add test

---
 stdlib/REPL/test/repl.jl | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/stdlib/REPL/test/repl.jl b/stdlib/REPL/test/repl.jl
index f4d594b2a02e1..b9d0ffff5dc02 100644
--- a/stdlib/REPL/test/repl.jl
+++ b/stdlib/REPL/test/repl.jl
@@ -1971,6 +1971,15 @@ end
         @test prompt == "(@v$(VERSION.major).$(VERSION.minor)) pkg> "
     end
 
+    # Issue 55850
+    tmp_55850 = mktempdir()
+    tmp_sym_link = joinpath(tmp_55850, "sym")
+    symlink(tmp_55850, tmp_sym_link; dir_target=true)
+    withenv("JULIA_DEPOT_PATH" => tmp_sym_link, "JULIA_LOAD_PATH" => nothing) do
+        prompt = readchomp(`$(Base.julia_cmd()[1]) --startup-file=no -e "using REPL; print(REPL.projname(REPL.find_project_file()))"`)
+        @test prompt == "@v$(VERSION.major).$(VERSION.minor)"
+    end
+
     get_prompt(proj::String) = readchomp(`$(Base.julia_cmd()[1]) --startup-file=no $(proj) -e "using REPL; print(REPL.Pkg_promptf())"`)
 
     @test get_prompt("--project=$(pkgdir(REPL))") == "(REPL) pkg> "

From 51a2f1d30373f1f90def94cbdade1922ee964f10 Mon Sep 17 00:00:00 2001
From: Christian Guinard <28689358+christiangnrd@users.noreply.github.com>
Date: Tue, 24 Sep 2024 14:42:21 -0300
Subject: [PATCH 3/3] Speed up tests

---
 stdlib/REPL/test/repl.jl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/stdlib/REPL/test/repl.jl b/stdlib/REPL/test/repl.jl
index b9d0ffff5dc02..85a8137fa003e 100644
--- a/stdlib/REPL/test/repl.jl
+++ b/stdlib/REPL/test/repl.jl
@@ -1966,7 +1966,7 @@ end
 
 @testset "Dummy Pkg prompt" begin
     # do this in an empty depot to test default for new users
-    withenv("JULIA_DEPOT_PATH" => mktempdir(), "JULIA_LOAD_PATH" => nothing) do
+    withenv("JULIA_DEPOT_PATH" => mktempdir() * (Sys.iswindows() ? ";" : ":"), "JULIA_LOAD_PATH" => nothing) do
         prompt = readchomp(`$(Base.julia_cmd()[1]) --startup-file=no -e "using REPL; print(REPL.Pkg_promptf())"`)
         @test prompt == "(@v$(VERSION.major).$(VERSION.minor)) pkg> "
     end
@@ -1975,7 +1975,7 @@ end
     tmp_55850 = mktempdir()
     tmp_sym_link = joinpath(tmp_55850, "sym")
     symlink(tmp_55850, tmp_sym_link; dir_target=true)
-    withenv("JULIA_DEPOT_PATH" => tmp_sym_link, "JULIA_LOAD_PATH" => nothing) do
+    withenv("JULIA_DEPOT_PATH" => tmp_sym_link * (Sys.iswindows() ? ";" : ":"), "JULIA_LOAD_PATH" => nothing) do
         prompt = readchomp(`$(Base.julia_cmd()[1]) --startup-file=no -e "using REPL; print(REPL.projname(REPL.find_project_file()))"`)
         @test prompt == "@v$(VERSION.major).$(VERSION.minor)"
     end