From 390260c6a689912dbf4c9d41fe36418c44b1d89a Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Thu, 30 Dec 2021 21:49:20 +0100
Subject: [PATCH] Resolve binary realpath to make sure symlinking bin proxies
 works, refs jakzal/phpqa#336

---
 src/Composer/Installer/BinaryInstaller.php | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/Composer/Installer/BinaryInstaller.php b/src/Composer/Installer/BinaryInstaller.php
index 652b58ff1..b7b2b40ab 100644
--- a/src/Composer/Installer/BinaryInstaller.php
+++ b/src/Composer/Installer/BinaryInstaller.php
@@ -392,7 +392,13 @@ PROXY;
         return <<<PROXY
 #!/usr/bin/env sh
 
-dir=\$(cd "\${0%[/\\\\]*}" > /dev/null; cd $binDir && pwd)
+self=\$(realpath \$0)
+if [ -z "\$self" ]
+then
+    self="\$0"
+fi
+
+dir=\$(cd "\${self%[/\\\\]*}" > /dev/null; cd $binDir && pwd)
 
 if [ -d /proc/cygdrive ]; then
     case \$(which php) in
@@ -403,7 +409,7 @@ if [ -d /proc/cygdrive ]; then
     esac
 fi
 
-export COMPOSER_BIN_DIR=\$(cd "\${0%[/\\\\]*}" > /dev/null; pwd)
+export COMPOSER_BIN_DIR=\$(cd "\${self%[/\\\\]*}" > /dev/null; pwd)
 
 "\${dir}/$binFile" "\$@"