Allow writing of logfiles instead of all to stderr.

src/common

@@ -68,6 +68,13 @@ get_version() {
 get_command() {
     jq -r '.params.command // ["true"]' < "$INPUT_PATH" | jq -r '.[]' | tr '\n"' " '"
 }
+get_stdout_file() {
+    jq -r '.params.stderr_file // "-"' | jq -r tostring
+}
+get_stdout_file() {
+    jq -r '.params.stdout_file // "-"' | jq -r tostring
+}
+
 HOSTNAME="$(get_hostname)"
 PORT="$(get_port)"
 USER="$(get_user)"
@@ -78,6 +85,8 @@ DIRECTORY="$(get_directory)"
 WORKDIR="$(get_workdir)"
 VERSION="$(get_version)"
 COMMAND="$(get_command)"
+STDERR_FILE="$(get_stderr_file)"
+STDOUT_FILE="$(get_stdout_file)"
 
 export HOSTNAME
 export PORT
@@ -89,6 +98,8 @@ export DIRECTORY
 export WORKDIR
 export VERSION
 export COMMAND
+export STDERR_FILE
+export STDOUT_FILE
 
 write_config() {
     config="$(tmpfile)"

src/scripts/put_files.sh

@@ -8,13 +8,35 @@ directory="${DIRECTORY}"
 workdir="${WORKDIR}"
 # shellcheck disable=SC2153
 extract="${EXTRACT}"
+# shellcheck disable=SC2153
+stderr_file="${STDERR_FILE}"
+# shellcheck disable=SC2153
+stdout_file="${STDOUT_FILE}"
+
 (
-    if "$extract"; then
-        cd "$directory"
-        tar x
-    fi
+  if "$extract"; then
+    cd "$directory"
+    tar x
+  fi
 )
 (
-    cd "$workdir"
-    ${COMMAND} >&2
+  cd "$workdir"
+  [ "$stderr_file" != "-" ] && truncate -s 0 "$stderr_file"
+  [ "$stdout_file" != "-" ] && truncate -s 0 "$stdout_file"
+
+  # don't write anything to stdout, since that would get appended to the tar file
+  if [ "$stderr_file" = "-" ] && [ "$stdout_file" = "-" ]; then
+    # redirect stdout to stderr
+    ${COMMAND} 1>&2
+  elif [ "$stderr_file" != "-" ] && [ "$stdout_file" = "-" ]; then
+    # stderr to file, stdout to stderr
+    ( ${COMMAND} 2>"$stderr_file" ) 1>&2
+
+  elif [ "$stderr_file" = "-" ] && [ "$stdout_file" != "-" ]; then
+    # stdout to file
+    ${COMMAND} 1>"$stdout_file"
+  else
+    # both files specified
+    ${COMMAND} 1>"$stdout_file" 2>"$stderr_file"
+  fi
 )

src/scripts/put_files.vars

@@ -2,3 +2,5 @@ ${DIRECTORY}
 ${EXTRACT}
 ${WORKDIR}
 ${COMMAND}
+${STDERR_FILE}
+${STDOUT_FILE}