view tests/test-diff-ignore-whitespace @ 4946:e8f4e40f285a

convert/subversion: work around memory leak in svn's python bindings

The svn.ra.get_log wrapper attaches the hash of changed paths for every
log entry to a global memory pool, so memory consumption increases
rapidly, with no way to free it.

Our workaround is to call this function in a child process, and feed
its results back over a pipe.  The memory consumption of the child still
grows huge (hundreds of megabytes), but at least it goes away once the
reading-the-log phase is done.

#!/bin/sh

# GNU diff is the reference for all of these results.

hgdiff() {
    echo hg diff $@
    hg diff --nodates "$@"
}

test_added_blank_lines() {
    printf '\nhello world\n\ngoodbye world\n\n' >foo

    echo '>>> two diffs showing three added lines <<<'
    hgdiff
    hgdiff -b

    echo '>>> no diffs <<<'
    hgdiff -B
    hgdiff -Bb
}

test_added_horizontal_space_first_on_a_line() {
    printf '\t hello world\ngoodbye world\n' >foo

    echo '>>> four diffs showing added space first on the first line <<<'
    hgdiff
    hgdiff -b
    hgdiff -B
    hgdiff -Bb
}

test_added_horizontal_space_last_on_a_line() {
    printf 'hello world\t \ngoodbye world\n' >foo

    echo '>>> two diffs showing space appended to the first line <<<'
    hgdiff
    hgdiff -B

    echo '>>> no diffs <<<'
    hgdiff -b
    hgdiff -Bb
}

test_added_horizontal_space_in_the_middle_of_a_word() {
    printf 'hello world\ngood bye world\n' >foo

    echo '>>> four diffs showing space inserted into "goodbye" <<<'
    hgdiff
    hgdiff -B
    hgdiff -b
    hgdiff -Bb
}

test_increased_horizontal_whitespace_amount() {
    printf 'hello world\ngoodbye\t\t  \tworld\n' >foo

    echo '>>> two diffs showing changed whitespace amount in the last line <<<'
    hgdiff
    hgdiff -B

    echo '>>> no diffs <<<'
    hgdiff -b
    hgdiff -Bb
}

test_added_blank_line_with_horizontal_whitespace() {
    printf 'hello world\n \t\ngoodbye world\n' >foo

    echo '>>> four diffs showing added blank line w/horizontal space <<<'
    hgdiff
    hgdiff -B
    hgdiff -b
    hgdiff -Bb
}

test_added_blank_line_with_other_whitespace() {
    printf 'hello  world\n \t\ngoodbye world \n' >foo

    echo '>>> three diffs showing added blank line w/other space <<<'
    hgdiff
    hgdiff -B
    hgdiff -b
    hgdiff -Bb
}

test_whitespace_changes() {
    printf 'helloworld\ngoodbye\tworld \n' >foo

    echo '>>> four diffs showing changed whitespace <<<'
    hgdiff
    hgdiff -B
    hgdiff -b
    hgdiff -Bb
    hgdiff -w
}

test_whitespace_changes_and_blank_lines() {
    printf 'helloworld\n\n\n\ngoodbye\tworld \n' >foo

    echo '>>> five diffs showing changed whitespace <<<'
    hgdiff
    hgdiff -B
    hgdiff -b
    hgdiff -Bb
    hgdiff -w
    hgdiff -wB
}

hg init
printf 'hello world\ngoodbye world\n' >foo
hg ci -Amfoo -ufoo -d '0 0'

test_added_blank_lines
test_added_horizontal_space_first_on_a_line
test_added_horizontal_space_last_on_a_line
test_added_horizontal_space_in_the_middle_of_a_word
test_increased_horizontal_whitespace_amount
test_added_blank_line_with_horizontal_whitespace
test_added_blank_line_with_other_whitespace
test_whitespace_changes
test_whitespace_changes_and_blank_lines