diff options
Diffstat (limited to 'scripts/env2string.awk')
| -rw-r--r-- | scripts/env2string.awk | 29 |
1 files changed, 20 insertions, 9 deletions
diff --git a/scripts/env2string.awk b/scripts/env2string.awk index 57d0fc8..1bfe9ed 100644 --- a/scripts/env2string.awk +++ b/scripts/env2string.awk @@ -21,29 +21,39 @@ BEGIN { # 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 (match($0, "^([^ \t=][^ =]*)=(.*)$", arr)) { + if (has_var) { if (length(env) != 0) { # Record the value of the variable now completed vars[var] = env + do_output = 1 } - var = arr[1] - env = arr[2] + + # Collect the variable name. The value follows the '=' + match($0, "^([^ \t=][^ =]*)=") + var = substr($0, 1, RLENGTH - 1) + env = substr($0, RLENGTH + 1) # Deal with += which concatenates the new string to the existing - # variable - if (length(env) != 0 && match(var, "^(.*)[+]$", var_arr)) - { + # variable. Again we are careful to use POSIX match() + if (length(env) != 0 && match(var, "^(.*)[+]$")) { + plusname = substr(var, RSTART, RLENGTH - 1) # Allow var\+=val to indicate that the variable name is # var+ and this is not actually a concatenation - if (substr(var_arr[1], length(var_arr[1])) == "\\") { + if (substr(plusname, length(plusname)) == "\\") { # Drop the backslash sub(/\\[+]$/, "+", var) } else { - var = var_arr[1] + var = plusname env = vars[var] env } } @@ -65,9 +75,10 @@ END { # empty it is not set. if (length(env) != 0) { vars[var] = env + do_output = 1 } - if (length(vars) != 0) { + if (do_output) { printf("%s", "#define CONFIG_EXTRA_ENV_TEXT \"") # Print out all the variables |