You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
95 lines
2.3 KiB
95 lines
2.3 KiB
# SPDX-License-Identifier: GPL-2.0+
|
|
#
|
|
# Copyright 2021 Google, Inc
|
|
#
|
|
# SPDX-License-Identifier: GPL-2.0+
|
|
#
|
|
# Awk script to parse a text file containing an environment and convert it
|
|
# to a C string which can be compiled into U-Boot.
|
|
|
|
# The resulting output is:
|
|
#
|
|
# #define CONFIG_EXTRA_ENV_TEXT "<environment here>"
|
|
#
|
|
# If the input is empty, this script outputs a comment instead.
|
|
|
|
BEGIN {
|
|
# env holds the env variable we are currently processing
|
|
env = "";
|
|
ORS = ""
|
|
}
|
|
|
|
# Skip empty lines, as these are generated by the clang preprocessor
|
|
NF {
|
|
do_output = 0
|
|
|
|
# Quote quotes
|
|
gsub("\"", "\\\"")
|
|
|
|
# Avoid using the non-POSIX third parameter to match(), by splitting
|
|
# the work into several steps.
|
|
has_var = match($0, "^([^ \t=][^ =]*)=(.*)$")
|
|
|
|
# Is this the start of a new environment variable?
|
|
if (has_var) {
|
|
if (length(env) != 0) {
|
|
# Record the value of the variable now completed
|
|
vars[var] = env
|
|
do_output = 1
|
|
}
|
|
|
|
# Collect the variable name. The value follows the '='
|
|
match($0, "^([^ \t=][^ =]*)=")
|
|
var = substr($0, 1, RLENGTH - 1)
|
|
env = substr($0, RLENGTH + 1)
|
|
|
|
# Deal with += which concatenates the new string to the existing
|
|
# variable. Again we are careful to use POSIX match()
|
|
if (length(env) != 0 && match(var, "^(.*)[+]$")) {
|
|
plusname = substr(var, RSTART, RLENGTH - 1)
|
|
# Allow var\+=val to indicate that the variable name is
|
|
# var+ and this is not actually a concatenation
|
|
if (substr(plusname, length(plusname)) == "\\") {
|
|
# Drop the backslash
|
|
sub(/\\[+]$/, "+", var)
|
|
} else {
|
|
var = plusname
|
|
env = vars[var] env
|
|
}
|
|
}
|
|
} else {
|
|
# Change newline to space
|
|
gsub(/^[ \t]+/, "")
|
|
|
|
# Don't keep leading spaces generated by the previous blank line
|
|
if (length(env) == 0) {
|
|
env = $0
|
|
} else {
|
|
env = env " " $0
|
|
}
|
|
}
|
|
}
|
|
|
|
END {
|
|
# Record the value of the variable now completed. If the variable is
|
|
# empty it is not set.
|
|
if (length(env) != 0) {
|
|
vars[var] = env
|
|
do_output = 1
|
|
}
|
|
|
|
if (do_output) {
|
|
printf("%s", "#define CONFIG_EXTRA_ENV_TEXT \"")
|
|
|
|
# Print out all the variables by alphabetic order, if using
|
|
# gawk. This allows test_env_test.py to work on both awk (where
|
|
# this next line does nothing)
|
|
PROCINFO["sorted_in"] = "@ind_str_asc"
|
|
for (var in vars) {
|
|
env = vars[var]
|
|
print var "=" vars[var] "\\0"
|
|
}
|
|
print "\"\n"
|
|
}
|
|
}
|