[supervisor] support multi-line environment variable in ssh

Author: iQQBot

Diff for: components/supervisor/openssh/BUILD.yaml

@@ -9,7 +9,5 @@ packages:
         - ["rm", "-rf", "components-supervisor-openssh--docker-build"]
   - name: docker-build
     type: docker
-    srcs:
-      - "*.patch"
     config:
       dockerfile: leeway.Dockerfile

Diff for: components/supervisor/openssh/leeway.Dockerfile

@@ -54,12 +54,10 @@ RUN ./configure \
     --with-privsep-user=nobody \
     --with-ssl-engine
 
-COPY supervisorenv.patch .
 ENV aports=https://raw.githubusercontent.com/alpinelinux/aports/master/main/openssh
 RUN curl -fsSL \
     "${aports}/{avoid-redefined-warnings-when-building-with-utmps,disable-forwarding-by-default,fix-utmp,fix-verify-dns-segfault,gss-serv.c,sftp-interactive}.patch" \
     | patch -p1
-RUN cat supervisorenv.patch | patch -p1
 RUN make install-nosysconf exec_prefix=/openssh
 
 RUN TEST_SSH_UNSAFE_PERMISSIONS=1 \

Diff for: components/supervisor/openssh/supervisorenv.patch

@@ -33,9 +33,9 @@ func newSSHServer(ctx context.Context, cfg *Config, envvars []string) (*sshServe
 			return nil, xerrors.Errorf("unexpected error creating SSH key: %w", err)
 		}
 	}
-	err = writeSSHEnv(cfg, envvars)
+	err = ensureSSHDir(cfg)
 	if err != nil {
-		return nil, xerrors.Errorf("unexpected error creating SSH env: %w", err)
+		return nil, xerrors.Errorf("unexpected error creating SSH dir: %w", err)
 	}
 
 	return &sshServer{
@@ -103,6 +103,18 @@ func (s *sshServer) handleConn(ctx context.Context, conn net.Conn) {
 		"-oLogLevel DEBUG", // enabled DEBUG mode by default
 	}
 
+	envs := make([]string, 0)
+	for _, env := range s.envvars {
+		s := strings.SplitN(env, "=", 2)
+		if len(s) != 2 {
+			continue
+		}
+		envs = append(envs, fmt.Sprintf("%s=%s", s[0], fmt.Sprintf("\"%s\"", strings.ReplaceAll(s[1], "\"", "\\\""))))
+	}
+	if len(envs) > 0 {
+		args = append(args, fmt.Sprintf("-oSetEnv %s", strings.Join(envs, " ")))
+	}
+
 	socketFD, err := conn.(*net.TCPConn).File()
 	if err != nil {
 		log.WithError(err).Error("cannot start SSH server")
@@ -189,21 +201,14 @@ func prepareSSHKey(ctx context.Context, sshkey string) error {
 	return nil
 }
 
-func writeSSHEnv(cfg *Config, envvars []string) error {
+func ensureSSHDir(cfg *Config) error {
 	home := "/home/gitpod"
 
 	d := filepath.Join(home, ".ssh")
 	err := os.MkdirAll(d, 0o700)
 	if err != nil {
 		return xerrors.Errorf("cannot create $HOME/.ssh: %w", err)
 	}
-
-	fn := filepath.Join(d, "supervisor_env")
-	err = os.WriteFile(fn, []byte(strings.Join(envvars, "\n")), 0o644)
-	if err != nil {
-		return xerrors.Errorf("cannot write %s: %w", fn, err)
-	}
-
 	_ = exec.Command("chown", "-R", fmt.Sprintf("%d:%d", gitpodUID, gitpodGID), d).Run()
 
 	return nil