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Write output of command in bash script returns an empty file
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I have a bash script used to write all the committers' details to a file for each repository on a list.
If I perform the steps manually, the file is written and there's content. However, if I do this using the bash script, the written file is empty (without content).
Can you help me find what is wrong?
Thanks in advance.
Below, you can find my script.
#!/usr/bin/env sh
if [ $# -lt 1 ];then
echo "usage: $0 <repos_list>"
exit 1
fi
repos_list=$1
cat $repos_list | while read -r line || [[ -n "$line" ]];
do
# Control will enter here if $line exists.
if [ -d "$line" ]; then
cd $line
git shortlog -sne > git_commits.file 2>&1
echo --------------------------------
echo "#Commits and committers for $line"
echo --------------------------------
cat git_commits.file
echo --------------------------------
rm -rf git_commits.file
cd ..
fi
done
bash sh stdout
asked Jan 3 at 12:05
Bruno FernandesBruno Fernandes
821110
|
show 2 more comments
0
I have a bash script used to write all the committers' details to a file for each repository on a list.
If I perform the steps manually, the file is written and there's content. However, if I do this using the bash script, the written file is empty (without content).
Can you help me find what is wrong?
Thanks in advance.
Below, you can find my script.
#!/usr/bin/env sh
if [ $# -lt 1 ];then
echo "usage: $0 <repos_list>"
exit 1
fi
repos_list=$1
cat $repos_list | while read -r line || [[ -n "$line" ]];
do
# Control will enter here if $line exists.
if [ -d "$line" ]; then
cd $line
git shortlog -sne > git_commits.file 2>&1
echo --------------------------------
echo "#Commits and committers for $line"
echo --------------------------------
cat git_commits.file
echo --------------------------------
rm -rf git_commits.file
cd ..
fi
done
bash sh stdout
asked Jan 3 at 12:05
Bruno FernandesBruno Fernandes
821110
First, note that the or part of the while condition will only be executed if thereadsets an exit code, i.e. if $repos_list is exhausted. In this case,$linestill holds the content of the last input line, but you have processed it already. Aside from this, I guess that what is stored in$lineis not a directory; you could verify it by adding anelsepart, where you print out:echo Not a directory: $line.
– user1934428
Jan 3 at 14:05
2
An aside -Don'tcat $repos_list. Trydone < $repos_list.
– Paul Hodges
Jan 3 at 14:21
1
@user1934428 The|| [[ -n "$line" ]]bit is for the case where the input file doesn't have a newline on the last line.
– Benjamin W.
Jan 3 at 14:29
1
You have ashshebang line, but you use bashisms such as[[ ]]. Use a bash shebang line instead, or use[ ... ]instead.
– Benjamin W.
Jan 3 at 14:30
1
Which file do you expect to be written? The only file I see is deleted in every loop.
– Benjamin W.
Jan 3 at 14:31
|
show 2 more comments
0
0
0
I have a bash script used to write all the committers' details to a file for each repository on a list.
If I perform the steps manually, the file is written and there's content. However, if I do this using the bash script, the written file is empty (without content).
Can you help me find what is wrong?
Thanks in advance.
Below, you can find my script.
#!/usr/bin/env sh
if [ $# -lt 1 ];then
echo "usage: $0 <repos_list>"
exit 1
fi
repos_list=$1
cat $repos_list | while read -r line || [[ -n "$line" ]];
do
# Control will enter here if $line exists.
if [ -d "$line" ]; then
cd $line
git shortlog -sne > git_commits.file 2>&1
echo --------------------------------
echo "#Commits and committers for $line"
echo --------------------------------
cat git_commits.file
echo --------------------------------
rm -rf git_commits.file
cd ..
fi
done
bash sh stdout
asked Jan 3 at 12:05
Bruno FernandesBruno Fernandes
821110
I have a bash script used to write all the committers' details to a file for each repository on a list.
If I perform the steps manually, the file is written and there's content. However, if I do this using the bash script, the written file is empty (without content).
Can you help me find what is wrong?
Thanks in advance.
Below, you can find my script.
#!/usr/bin/env sh
if [ $# -lt 1 ];then
echo "usage: $0 <repos_list>"
exit 1
fi
repos_list=$1
cat $repos_list | while read -r line || [[ -n "$line" ]];
do
# Control will enter here if $line exists.
if [ -d "$line" ]; then
cd $line
git shortlog -sne > git_commits.file 2>&1
echo --------------------------------
echo "#Commits and committers for $line"
echo --------------------------------
cat git_commits.file
echo --------------------------------
rm -rf git_commits.file
cd ..
fi
done
bash sh stdout
bash sh stdout
asked Jan 3 at 12:05
Bruno FernandesBruno Fernandes
821110
asked Jan 3 at 12:05
Bruno FernandesBruno Fernandes
821110
asked Jan 3 at 12:05
Bruno FernandesBruno Fernandes
821110
asked Jan 3 at 12:05
Bruno FernandesBruno Fernandes
821110
asked Jan 3 at 12:05
Bruno FernandesBruno Fernandes
821110
821110
First, note that the or part of the while condition will only be executed if thereadsets an exit code, i.e. if $repos_list is exhausted. In this case,$linestill holds the content of the last input line, but you have processed it already. Aside from this, I guess that what is stored in$lineis not a directory; you could verify it by adding anelsepart, where you print out:echo Not a directory: $line.
– user1934428
Jan 3 at 14:05
2
An aside -Don'tcat $repos_list. Trydone < $repos_list.
– Paul Hodges
Jan 3 at 14:21
1
@user1934428 The|| [[ -n "$line" ]]bit is for the case where the input file doesn't have a newline on the last line.
– Benjamin W.
Jan 3 at 14:29
1
You have ashshebang line, but you use bashisms such as[[ ]]. Use a bash shebang line instead, or use[ ... ]instead.
– Benjamin W.
Jan 3 at 14:30
1
Which file do you expect to be written? The only file I see is deleted in every loop.
– Benjamin W.
Jan 3 at 14:31
|
show 2 more comments
First, note that the or part of the while condition will only be executed if thereadsets an exit code, i.e. if $repos_list is exhausted. In this case,$linestill holds the content of the last input line, but you have processed it already. Aside from this, I guess that what is stored in$lineis not a directory; you could verify it by adding anelsepart, where you print out:echo Not a directory: $line.
– user1934428
Jan 3 at 14:05
2
An aside -Don'tcat $repos_list. Trydone < $repos_list.
– Paul Hodges
Jan 3 at 14:21
1
@user1934428 The|| [[ -n "$line" ]]bit is for the case where the input file doesn't have a newline on the last line.
– Benjamin W.
Jan 3 at 14:29
1
You have ashshebang line, but you use bashisms such as[[ ]]. Use a bash shebang line instead, or use[ ... ]instead.
– Benjamin W.
Jan 3 at 14:30
1
Which file do you expect to be written? The only file I see is deleted in every loop.
– Benjamin W.
Jan 3 at 14:31
First, note that the or part of the while condition will only be executed if the
read sets an exit code, i.e. if $repos_list is exhausted. In this case, $line still holds the content of the last input line, but you have processed it already. Aside from this, I guess that what is stored in $line is not a directory; you could verify it by adding an else part, where you print out: echo Not a directory: $line.– user1934428
Jan 3 at 14:05
First, note that the or part of the while condition will only be executed if the
read sets an exit code, i.e. if $repos_list is exhausted. In this case, $line still holds the content of the last input line, but you have processed it already. Aside from this, I guess that what is stored in $line is not a directory; you could verify it by adding an else part, where you print out: echo Not a directory: $line.– user1934428
Jan 3 at 14:05
2
2
An aside -Don't
cat $repos_list. Try done < $repos_list.– Paul Hodges
Jan 3 at 14:21
An aside -Don't
cat $repos_list. Try done < $repos_list.– Paul Hodges
Jan 3 at 14:21
1
1
@user1934428 The
|| [[ -n "$line" ]] bit is for the case where the input file doesn't have a newline on the last line.– Benjamin W.
Jan 3 at 14:29
@user1934428 The
|| [[ -n "$line" ]] bit is for the case where the input file doesn't have a newline on the last line.– Benjamin W.
Jan 3 at 14:29
1
1
You have a
sh shebang line, but you use bashisms such as [[ ]]. Use a bash shebang line instead, or use [ ... ] instead.– Benjamin W.
Jan 3 at 14:30
You have a
sh shebang line, but you use bashisms such as [[ ]]. Use a bash shebang line instead, or use [ ... ] instead.– Benjamin W.
Jan 3 at 14:30
1
1
Which file do you expect to be written? The only file I see is deleted in every loop.
– Benjamin W.
Jan 3 at 14:31
Which file do you expect to be written? The only file I see is deleted in every loop.
– Benjamin W.
Jan 3 at 14:31
|
show 2 more comments
0
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First, note that the or part of the while condition will only be executed if the
readsets an exit code, i.e. if $repos_list is exhausted. In this case,$linestill holds the content of the last input line, but you have processed it already. Aside from this, I guess that what is stored in$lineis not a directory; you could verify it by adding anelsepart, where you print out:echo Not a directory: $line.– user1934428
Jan 3 at 14:05
2
An aside -Don't
cat $repos_list. Trydone < $repos_list.– Paul Hodges
Jan 3 at 14:21
1
@user1934428 The
|| [[ -n "$line" ]]bit is for the case where the input file doesn't have a newline on the last line.– Benjamin W.
Jan 3 at 14:29
1
You have a
shshebang line, but you use bashisms such as[[ ]]. Use a bash shebang line instead, or use[ ... ]instead.– Benjamin W.
Jan 3 at 14:30
1
Which file do you expect to be written? The only file I see is deleted in every loop.
– Benjamin W.
Jan 3 at 14:31