github.com/maruel/nin@v0.0.0-20220112143044-f35891e3ce7e/src/inline.sh (about)

     1  #!/bin/sh
     2  #
     3  # Copyright 2001 Google Inc. All Rights Reserved.
     4  #
     5  # Licensed under the Apache License, Version 2.0 (the "License");
     6  # you may not use this file except in compliance with the License.
     7  # You may obtain a copy of the License at
     8  #
     9  #     http://www.apache.org/licenses/LICENSE-2.0
    10  #
    11  # Unless required by applicable law or agreed to in writing, software
    12  # distributed under the License is distributed on an "AS IS" BASIS,
    13  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14  # See the License for the specific language governing permissions and
    15  # limitations under the License.
    16  
    17  # This quick script converts a text file into an #include-able header.
    18  # It expects the name of the variable as its first argument, and reads
    19  # stdin and writes stdout.
    20  
    21  varname="$1"
    22  
    23  # 'od' and 'sed' may not be available on all platforms, and may not support the
    24  # flags used here. We must ensure that the script exits with a non-zero exit
    25  # code in those cases.
    26  byte_vals=$(od -t x1 -A n -v) || exit 1
    27  escaped_byte_vals=$(echo "${byte_vals}" \
    28    | sed -e 's|^[\t ]\{0,\}$||g; s|[\t ]\{1,\}| |g; s| \{1,\}$||g; s| |\\x|g; s|^|"|; s|$|"|') \
    29    || exit 1
    30  
    31  # Only write output once we have successfully generated the required data
    32  printf "const char %s[] = \n%s;" "${varname}" "${escaped_byte_vals}"