Put $awk in quotes:
awk -v m="$build_message" -v s="$settings" "$awk" "$file"
Вопрос
I wrote this test script:
#!/bin/bash
build_message='build'
# On first run, the supplied settings block is appended to the supplied config
# file surrounded by comments ("# build START" and "# build END").
# On subsequent runs, the lines in between the two comments will be replaced
# by the provided settings block.
config-insert () {
settings="$1"
file="$2"
awk='BEGIN { p = 1; o = 1; }
$0 ~ "^# " m " START" { p = 0; if (o) output(); o = 0; }
$0 ~ "^# " m " END"{ p = 1; next }
END { if (o) output(o); }
{ if (p) print $0; }
function output() { print "# " m " START\n" s "\n# " m " END"; }'
awk -v m="$build_message" -v s="$settings" $awk $file > $file
}
config-insert "setting block" testfile
When I run it, I get a weird error:
awk: cmd. line:1: BEGIN blocks must have an action part
Решение
Put $awk in quotes:
awk -v m="$build_message" -v s="$settings" "$awk" "$file"
Другие советы
The shell is eating your quotes. Typically when I get to problems like this with awk/bash/sed scripting I resort to a temp file.
...
tempfile=$(mktemp)
echo ${awk} >${tempfile}
awk ... -f ${tempfile} ...
rm ${tempfile}
Depending on degree of security you want, you might use mktemp to make the directory rather than the file.