add git credential helper for http(s) authHEADmaster

1 files changed, 36 insertions, 0 deletions

diff --git a/contrib/git-credential-kasi b/contrib/git-credential-kasi
new file mode 100755
index 0000000..794ef62
--- /dev/null
+++ b/contrib/git-credential-kasi
@@ -0,0 +1,36 @@
+#!/bin/sh
+# reads git's request on stdin and prints credentials to stdout
+# this script is made for overleaf's non-standard ssh-less git
+# but it can be trivially modified for other git http auth
+
+# Setup:
+# git config --global credential.helper kasi
+# git config --global credential.https://git.overleaf.com/.username git
+
+set -euo pipefail
+
+# read the command from Git
+if [ -n "$1" ]; then cmd="$1"; else read cmd || exit 1; fi
+
+case "$cmd" in
+        # easier on me to manually handle credentials
+        store) ;;
+        erase) ;;
+
+        # git is fine with nothing responded to this
+        capability*) ;;
+
+        # the only command needed
+        get)
+                host="$(awk -F'=' '/^host=/ {print $2; exit}' <&0)"
+                [ "$host" != "git.overleaf.com" ] && exit 0
+
+                password="$(kasi view 'university/overleaf' | awk '/^Git:/ {print $2}')"
+                echo "username=git"
+                echo "password=$password"
+                ;;
+        *)
+                echo >&2 "Unknown command received by git-credential-kasi: $cmd"
+                exit 1
+                ;;
+esac