I want to execute following command on linux terminal using python script
hg log -r "((last(tag())):(first(last(tag(),2))))" work
This command give changesets between last two tags who have affected files in "work" directory
I tried:
import subprocess
releaseNotesFile = 'diff.txt'
with open(releaseNotesFile, 'w') as f:
f.write(subprocess.call(['hg', 'log', '-r', '"((last(tag())):(first(last(tag(),2))))"', 'work']))
error:
abort: unknown revision '((last(tag())):(first(last(tag(),2))))'!
Traceback (most recent call last):
File "test.py", line 4, in <module>
f.write(subprocess.call(['hg', 'log', '-r', '"((last(tag())):(first(last(tag(),2))))"', 'work']))
TypeError: expected a character buffer object
Working with os.popen()
with open(releaseNotesFile, 'w') as file:
f = os.popen('hg log -r "((last(tag())):(first(last(tag(),2))))" work')
file.write(f.read())
How to execute that command using subprocess ?
To solve your problem, change the f.write(subprocess...
line to:
f.write(subprocess.call(['hg', 'log', '-r', '((last(tag())):(first(last(tag(),2))))', 'dcpp']))
When calling a program from a command line (like bash), will "ignore" the "
characters. The two commands below are equivalent:
hg log -r something
hg "log" "-r" "something"
In your specific case, the original version in the shell has to be enclosed in double quotes because it has parenthesis and those have a special meaning in bash. In python that is not necessary since you are enclosing them using single quotes.
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