I am reading configurations from .config file and I want to do some operation if a configuration is enabled. I have written following function but it is throwing error message "/bin/sh: 1: Syntax error: ")" unexpected (expecting "then")"
define parse_configs
while read -r file; do \
config=$$(echo $$file | grep -Po '(?<=(CONFIG_)).*(?==)'); \
val=$$(echo $$file | grep -Po '(?<=(=)).*'); \
$$(if $(findstring y, $$val), echo "do Ops", echo "No ops"); \
done < .config;
endef
The problem is with if statement, other part of function is fine. Please let me know the mistake in the code. Thanks.
What is wrong with the statement:
$$(if $(findstring y, $$val), echo "do Ops", echo "No ops");
is that is actually a GNU Make if-function,
calling the GNU Make findstring-function,
which you have written in the middle of a shell statement, and required ($$) that it be expanded by the shell, but it makes no sense to the shell.
It might as well be Javascript. Replace it with an appropriate shell if-statement, e.g.
while read -r file; do \
config=$$(echo $$file | grep -Po '(?<=(CONFIG_)).*(?==)'); \
val=$$(echo $$file | grep -Po '(?<=(=)).*'); \
if [ -z $${val##*"y"*} ]; then echo "do Ops"; else echo "No ops"; fi; \
done < .config;
Related
I went through some posts, but still didn't get how it work.
My request is:
for i in *.json
do
file = `echo $i |cut -d _ -f2`
echo ${file}
# do the rest tasks
done
How to convert above script to target of Makefile?
Here is what I tried
foo:
for i in *.json; do \
$(eval FILE = $(shell echo $$i |cut -d _ -f2)); \
echo $(FILE) ;\
done
But it doesn't work
Using $(eval) or $(shell) is ... not even wrong.
foo:
for i in *.json; do \
file=$$(echo "$$i" |cut -d _ -f2); \
echo "$$file"; \
done
Notice the quoting of the filename variables, and the absence of spaces around the = assignment operator, and the doubling of any dollar sign in order to pass it through from make to the shell.
However, the shell provides a much better mechanism for this;
foo:
for i in *.json; do \
j=$${i#*_}; \
echo "$${j%%_*}"; \
done
or perhaps
foo:
printf '%s\n' *.json \
| sed 's/[^_]*_\([^_]*\)_.*/\1/'
If you only expect a single underscore, both of these can be further simplified.
Or maybe you are just looking for
makefile_variable := $(foreach x,$(wildcard *.json),$(word 2,$(subst _, ,$x)))
I was reading the grep source code and found egrep.sh with the below content:
#!#SHELL#
grep=grep
case $0 in
*/*)
dir=${0%/*}
if test -x "$dir/#grep#"; then
PATH=$dir:$PATH
grep=#grep#
fi;;
esac
exec $grep #option# "$#"
I don't seem to understand how #SHELL# #grep# and #option# works or even what they do in the context they are used
Referenced source is located at: http://git.savannah.gnu.org/cgit/grep.git/tree/src/egrep.sh
Based on the comments, I read the Makefile and found that the #something# were placeholders to be substituted with sed as below:
sed -e 's|[#]SHELL#|$(SHELL)|g' \
-e "$$edit_substring" \
-e "s|[#]grep#|$$grep|g" \
-e "s|[#]option#|$$option|g" <$(srcdir)/egrep.sh >$#-t
$(AM_V_at)chmod a=rx $#-t
$(AM_V_at)mv $#-t $#
In the goal to create a file from a one line (bash) command, the goal is to output the contents of any text file - in this example a bash script - and wrap each line inside a command that is able to output that same line when pasted in a Terminal window.
Example source input file:
Line 1
Line 2
Line 3
Example desired output:
echo 'Line 1';echo 'Line 2';echo 'Line 3';
Note: whether printf, echo or another command is used to create the output, doesn't matter as long as the source is human readable.
One hurdle were the single quotes, that would not be recreated. Therefore use the form $'string', which are treated specially. The word expands to string, with backslash-escaped characters replaced as specified by the ANSI C standard.
Another requirement is to re-create tab characters from the old file in the new file. Therefore the wish is to replace <\tab> characters with \t.
Our tries to do this with sed or tr fail. How to replace tabs with their escape \t counterpart and still being able to output lines with original quotes?
Input file /Library/Scripts/BootRepairMount.sh contains:
$ cat /Library/Scripts/BootRepairMount.sh
#!/bin/bash
sleep 18
for OUTPUT in $(diskutil list | grep ': Apple_HFS' | awk '{ print $NF }')
do
if [[ -z $(df -lnh | grep /dev/$OUTPUT) ]]; then
echo "$OUTPUT is not mounted, repair and mount"
diskutil repairVolume $OUTPUT
diskutil mount $OUTPUT
fi
done
The best shell one line command we could create is:
$ oldifs=$IFS;printf '\n';printf '{';while IFS= read -r p;do [[ "$p" == *"'"* ]] && echo -n "echo $'$p';" || echo -n "echo '$p';"; done < /Library/Scripts/BootRepairMount.sh | tr '\t' '\134\164';printf '}';printf '\n\n';IFS=$oldifs
Which returns this faulty output:
{echo '#!/bin/bash';echo 'sleep 18';echo $'for OUTPUT in $(diskutil list | grep ': Apple_HFS' | awk '{ print $NF }')';echo 'do';echo '\if [[ -z $(df -lnh | grep /dev/$OUTPUT) ]]; then';echo '\\echo "$OUTPUT is not mounted, repair and mount"';echo '\\diskutil repairVolume $OUTPUT';echo '\\diskutil mount $OUTPUT';echo '\fi';echo 'done';}
Desired output is:
{echo '#!/bin/bash';echo 'sleep 18';echo $'for OUTPUT in $(diskutil list | grep ': Apple_HFS' | awk '{ print $NF }')';echo 'do';echo '\tif [[ -z $(df -lnh | grep /dev/$OUTPUT) ]]; then';echo '\t\techo "$OUTPUT is not mounted, repair and mount"';echo '\t\tdiskutil repairVolume $OUTPUT';echo '\t\tdiskutil mount $OUTPUT';echo '\tfi';echo 'done';}
Bash one line command version 2
$ oldifs=$IFS;printf '\n';printf '{';while IFS= read -r p;do [[ "$p" == *"'"* ]] && printf 'printf $'\''%q'\'';' "$p" || printf 'printf '\''%q'\'';' "$p"; done < /Library/Scripts/BootRepairMount.sh;printf '}';printf '\n\n';IFS=$oldifs
returns output that is heavy escaped:
{printf '\#\!/bin/bash';printf 'sleep\ 18';printf $'for\ OUTPUT\ in\ \$\(diskutil\ list\ \|\ grep\ \':\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Apple_HFS\'\ \|\ awk\ \'\{\ print\ \$NF\ \}\'\)';printf 'do';printf '$'\tif [[ -z $(df -lnh | grep /dev/$OUTPUT) ]]; then'';printf '$'\t\techo "$OUTPUT is not mounted, repair and mount"'';printf '$'\t\tdiskutil repairVolume $OUTPUT'';printf '$'\t\tdiskutil mount $OUTPUT'';printf '$'\tfi'';printf 'done';}
that never gets unescaped back to its original values in Mac OS X 10.7.5.
printf '\#\!/bin/bash';
outputs:
\#\!/bin/bash
As well as:
echo -e '\#\!/bin/bash'
does output the unescaped value
\#\!/bin/bash
-e is not a valid command switch for the Mac OS X 10.7.5 echo command, according to its man page.
bash's builtin command printf has %q format code that handles this:
printf '\n{ '; while IFS= read -r p; do printf "echo %q; " "$p"; done < /Library/Scripts/BootRepairMount.sh; printf '}\n\n'
Unfortunately, it doesn't always choose quoting/escaping modes that're easy to read. Specifically, it tends to prefer escaping individual metacharacters (e.g. spaces) rather than enclosing them in quotes:
{ echo \#\!/bin/bash; echo sleep\ 18; echo for\ OUTPUT\ in\ \$(diskutil\ list\ \|\ grep\ \':\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Apple_HFS\'\ \|\ awk\ \'{\ print\ \$NF\ }\'); echo do; echo $'\tif [[ -z $(df -lnh | grep /dev/$OUTPUT) ]]; then'; echo $'\t\techo "$OUTPUT is not mounted, repair and mount"'; echo $'\t\tdiskutil repairVolume $OUTPUT'; echo $'\t\tdiskutil mount $OUTPUT'; echo $'\tfi'; echo done; }
If I understand right you want paste one long line to the Terminal.app and want get the "source code" of original script. So, need a script what will generate the one-line script.
Maybe a bit unusual solution, but it is easy and simple.
here is the test script called test.sh (instead of your BootReapirMount.sh)
for i in {1..10}
do
date
done
Here is the generator script mkecho.sh
#!/bin/bash
[[ ! -f "$1" ]] && echo "Need filename" && exit 1
asc=$(gzip < "$1" | base64)
echo "base64 -D <<<'$asc'| gzip -d"
Now, run:
bash mkecho.sh test.sh
you will get the next:
base64 -D <<<'H4sIAASwqFEAA0vLL1LIVMjMU6g21NMzNKjlSsnn4kxJLEkFMvJSuQBZFmY0HwAAAA=='| gzip -d
If you copy and paste the above into the terminal, it will will display the original test.sh
Variant2
If you want directly execute the script, you should modify the mkecho.sh to the next mkeval.sh
#!/bin/bash
[[ ! -f "$1" ]] && echo "Need filename" && exit 1
asc=$(gzip < "$1" | base64)
echo -n 'eval "$(base64 -D <<<"'
echo -n $asc
echo -n '" | gzip -d)"'
echo
When run
bash mkeval.sh test.sh
will get
eval "$(base64 -D <<<"H4sIAASwqFEAA0vLL1LIVMjMU6g21NMzNKjlSsnn4kxJLEkFMvJSuQBZFmY0HwAAAA==" | gzip -d)"
and finally when you copy and paste it into the terminal, you run the test.sh and will get:
Fri May 31 16:25:08 CEST 2013
... 8 lined deleted...
Fri May 31 16:25:08 CEST 2013
Warning: because the script is NOT TESTED for every possible conditions, nor for redirects and so on - I really don't recommending using the eval verision.
sed 's/\\t/\\/g'
$ echo 'ffsd \tif [[ -z $' | sed 's/\\t/\\/g'
ffsd \if [[ -z $
I am executing the following command in Makefile:-
#ls export_mojave/marker_*.tcl > export_mojave.list
#for file in `cat export_mojave_tcl_files.list`; do \
diff $$file bk_marker > $$file.diff ; \
if ! [ -s $$file.diff ]; then\
rm -f $$file.diff ; \
else \
echo $$file >> marker.fill.tcl.diff; \
fi \
done ;
If there exists some file related to the above expression in the mentioned directory,
it will run fine but if there does not exits any files matching to above expression, It is marking an error. Is there anything exists like "catch" in Makefile?
If you need to skip error in makefiles' rule, then prefix command with '-' sign:
-#ls .... > some_file || echo Error: no file;
if [ -e some_file ] ....
Or modify to be more in make-style:
FILES := $(shell ls ...)
ifeq ($(FILES),)
$(error no files)
endif
....
target:
$(foreach file,$(FILES), ...)
I have used the find command for this, but it doesnt return any message when a file is not found.
And I want the search to be recursive and return a message "not found" when a file is not found.
Here's the code I have done so far. Here "input.txt" contains the list of files to be searched.
set `cat input.txt`
echo $#
for i in $#
do
find $HOME -name $i
done
Try this:
listfile=input.txt
exec 3>&1
find | \
grep -f <( sed 's|.*|/&$|' "$listfile" ) | \
tee /dev/fd/3 | \
sed 's|.*/\([^/]*\)$|\1|' | \
grep -v -f - "$listfile" | \
sed 's/$/ Not found/'
exec 3>&-
open file descriptor 3
find the files
see if they're on the list (use sed to
send a copy of the found ones to file descriptor 3
strip off the directory name
get a list of the ones that don't appear
add the "Not found" message
close file descriptor 3
Output looks like:
/path/to/file1
/path/somewhere/file2
foo Not found
bar Not found
No loops necessary.
Whats wrong with using a script. I hope this will do.
#!/bin/bash -f
for i in $#
do
var=`find $HOME -name $i`
if [ -z "$var"]
then
var="File not found"
fi
echo $var
done
You can use the shell builtin 'test' to test the existence of a file. There is also an alternative syntax using square brackets:
if [ -f $a ]; then # Don't forget the semicolon.
echo $a
else
echo 'Not Found'
fi
Here is one way - create a list of all the files to grep against. If your implementation supports
grep -q otherwise use grep [pattern] 2&>1 >/dev/null....
find $HOME -type f |
while read fname
do
echo "$(basename $fname) $fname"
done > /tmp/chk.lis
while read fname
do
grep -q "^$fname" /tmp/chk.lis
[ $? -eq 0 ] && echo "$fname found" || echo "$fname not found"
done < /tmp/chk.lis
All of this is needed because POSIX find does not return an error when a file is not found
perl -nlE'say-f$_?$_:"not found: $_"' file