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git/t/t5409-colorize-remote-messages.sh

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sideband: highlight keywords in remote sideband output The colorization is controlled with the config setting "color.remote". Supported keywords are "error", "warning", "hint" and "success". They are highlighted if they appear at the start of the line, which is common in error messages, eg. ERROR: commit is missing Change-Id The Git push process itself prints lots of non-actionable messages (eg. bandwidth statistics, object counters for different phases of the process). This obscures actionable error messages that servers may send back. Highlighting keywords in the sideband draws more attention to those messages. The background for this change is that Gerrit does server-side processing to create or update code reviews, and actionable error messages (eg. missing Change-Id) must be communicated back to the user during the push. User research has shown that new users have trouble seeing these messages. The highlighting is done on the client rather than server side, so servers don't have to grow capabilities to understand terminal escape codes and terminal state. It also consistent with the current state where Git is control of the local display (eg. prefixing messages with "remote: "). The highlighting can be configured using color.remote.<KEYWORD> configuration settings. Since the keys are matched case insensitively, we match the keywords case insensitively too. Finally, this solution is backwards compatible: many servers already prefix their messages with "error", and they will benefit from this change without requiring a server update. By contrast, a server-side solution would likely require plumbing the TERM variable through the git protocol, so it would require changes to both server and client. Helped-by: Duy Nguyen <pclouds@gmail.com> Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-07 14:51:08 +02:00
#!/bin/sh
test_description='remote messages are colorized on the client'
. ./test-lib.sh
test_expect_success 'setup' '
mkdir .git/hooks &&
write_script .git/hooks/update <<-\EOF &&
echo error: error
echo ERROR: also highlighted
echo hint: hint
echo hinting: not highlighted
echo success: success
echo warning: warning
echo prefixerror: error
echo " " "error: leading space"
sideband: do not read beyond the end of input The caller of maybe_colorize_sideband() gives a counted buffer <src, n>, but the callee checked src[] as if it were a NUL terminated buffer. If src[] had all isspace() bytes in it, we would have made n negative, and then (1) made number of strncasecmp() calls to see if the remaining bytes in src[] matched keywords, reading beyond the end of the array (this actually happens even if n does not go negative), and/or (2) called strbuf_add() with negative count, most likely triggering the "you want to use way too much memory" error due to unsigned integer overflow. Fix both issues by making sure we do not go beyond &src[n]. In the longer term we may want to accept size_t as parameter for clarity (even though we know that a sideband message we are painting typically would fit on a line on a terminal and int is sufficient). Write it down as a NEEDSWORK comment. Helped-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-18 18:16:28 +02:00
echo " "
echo Err
sideband: highlight keywords in remote sideband output The colorization is controlled with the config setting "color.remote". Supported keywords are "error", "warning", "hint" and "success". They are highlighted if they appear at the start of the line, which is common in error messages, eg. ERROR: commit is missing Change-Id The Git push process itself prints lots of non-actionable messages (eg. bandwidth statistics, object counters for different phases of the process). This obscures actionable error messages that servers may send back. Highlighting keywords in the sideband draws more attention to those messages. The background for this change is that Gerrit does server-side processing to create or update code reviews, and actionable error messages (eg. missing Change-Id) must be communicated back to the user during the push. User research has shown that new users have trouble seeing these messages. The highlighting is done on the client rather than server side, so servers don't have to grow capabilities to understand terminal escape codes and terminal state. It also consistent with the current state where Git is control of the local display (eg. prefixing messages with "remote: "). The highlighting can be configured using color.remote.<KEYWORD> configuration settings. Since the keys are matched case insensitively, we match the keywords case insensitively too. Finally, this solution is backwards compatible: many servers already prefix their messages with "error", and they will benefit from this change without requiring a server update. By contrast, a server-side solution would likely require plumbing the TERM variable through the git protocol, so it would require changes to both server and client. Helped-by: Duy Nguyen <pclouds@gmail.com> Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-07 14:51:08 +02:00
exit 0
EOF
echo 1 >file &&
git add file &&
git commit -m 1 &&
git clone . child &&
(
cd child &&
test_commit message2 file content2
)
'
test_expect_success 'keywords' '
git --git-dir child/.git -c color.remote=always push -f origin HEAD:refs/heads/keywords 2>output &&
test_decode_color <output >decoded &&
grep "<BOLD;RED>error<RESET>: error" decoded &&
grep "<YELLOW>hint<RESET>:" decoded &&
grep "<BOLD;GREEN>success<RESET>:" decoded &&
grep "<BOLD;YELLOW>warning<RESET>:" decoded
'
test_expect_success 'whole words at line start' '
git --git-dir child/.git -c color.remote=always push -f origin HEAD:refs/heads/whole-words 2>output &&
test_decode_color <output >decoded &&
grep "<YELLOW>hint<RESET>:" decoded &&
grep "hinting: not highlighted" decoded &&
grep "prefixerror: error" decoded
'
sideband: do not read beyond the end of input The caller of maybe_colorize_sideband() gives a counted buffer <src, n>, but the callee checked src[] as if it were a NUL terminated buffer. If src[] had all isspace() bytes in it, we would have made n negative, and then (1) made number of strncasecmp() calls to see if the remaining bytes in src[] matched keywords, reading beyond the end of the array (this actually happens even if n does not go negative), and/or (2) called strbuf_add() with negative count, most likely triggering the "you want to use way too much memory" error due to unsigned integer overflow. Fix both issues by making sure we do not go beyond &src[n]. In the longer term we may want to accept size_t as parameter for clarity (even though we know that a sideband message we are painting typically would fit on a line on a terminal and int is sufficient). Write it down as a NEEDSWORK comment. Helped-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-18 18:16:28 +02:00
test_expect_success 'short line' '
git -C child -c color.remote=always push -f origin HEAD:short-line 2>output &&
test_decode_color <output >decoded &&
grep "remote: Err" decoded
'
sideband: highlight keywords in remote sideband output The colorization is controlled with the config setting "color.remote". Supported keywords are "error", "warning", "hint" and "success". They are highlighted if they appear at the start of the line, which is common in error messages, eg. ERROR: commit is missing Change-Id The Git push process itself prints lots of non-actionable messages (eg. bandwidth statistics, object counters for different phases of the process). This obscures actionable error messages that servers may send back. Highlighting keywords in the sideband draws more attention to those messages. The background for this change is that Gerrit does server-side processing to create or update code reviews, and actionable error messages (eg. missing Change-Id) must be communicated back to the user during the push. User research has shown that new users have trouble seeing these messages. The highlighting is done on the client rather than server side, so servers don't have to grow capabilities to understand terminal escape codes and terminal state. It also consistent with the current state where Git is control of the local display (eg. prefixing messages with "remote: "). The highlighting can be configured using color.remote.<KEYWORD> configuration settings. Since the keys are matched case insensitively, we match the keywords case insensitively too. Finally, this solution is backwards compatible: many servers already prefix their messages with "error", and they will benefit from this change without requiring a server update. By contrast, a server-side solution would likely require plumbing the TERM variable through the git protocol, so it would require changes to both server and client. Helped-by: Duy Nguyen <pclouds@gmail.com> Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-07 14:51:08 +02:00
test_expect_success 'case-insensitive' '
git --git-dir child/.git -c color.remote=always push -f origin HEAD:refs/heads/case-insensitive 2>output &&
cat output &&
test_decode_color <output >decoded &&
grep "<BOLD;RED>error<RESET>: error" decoded &&
grep "<BOLD;RED>ERROR<RESET>: also highlighted" decoded
'
test_expect_success 'leading space' '
git --git-dir child/.git -c color.remote=always push -f origin HEAD:refs/heads/leading-space 2>output && cat output &&
test_decode_color <output >decoded &&
grep " <BOLD;RED>error<RESET>: leading space" decoded
'
sideband: do not read beyond the end of input The caller of maybe_colorize_sideband() gives a counted buffer <src, n>, but the callee checked src[] as if it were a NUL terminated buffer. If src[] had all isspace() bytes in it, we would have made n negative, and then (1) made number of strncasecmp() calls to see if the remaining bytes in src[] matched keywords, reading beyond the end of the array (this actually happens even if n does not go negative), and/or (2) called strbuf_add() with negative count, most likely triggering the "you want to use way too much memory" error due to unsigned integer overflow. Fix both issues by making sure we do not go beyond &src[n]. In the longer term we may want to accept size_t as parameter for clarity (even though we know that a sideband message we are painting typically would fit on a line on a terminal and int is sufficient). Write it down as a NEEDSWORK comment. Helped-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-18 18:16:28 +02:00
test_expect_success 'spaces only' '
git -C child -c color.remote=always push -f origin HEAD:only-space 2>output &&
test_decode_color <output >decoded &&
grep "remote: " decoded
'
sideband: highlight keywords in remote sideband output The colorization is controlled with the config setting "color.remote". Supported keywords are "error", "warning", "hint" and "success". They are highlighted if they appear at the start of the line, which is common in error messages, eg. ERROR: commit is missing Change-Id The Git push process itself prints lots of non-actionable messages (eg. bandwidth statistics, object counters for different phases of the process). This obscures actionable error messages that servers may send back. Highlighting keywords in the sideband draws more attention to those messages. The background for this change is that Gerrit does server-side processing to create or update code reviews, and actionable error messages (eg. missing Change-Id) must be communicated back to the user during the push. User research has shown that new users have trouble seeing these messages. The highlighting is done on the client rather than server side, so servers don't have to grow capabilities to understand terminal escape codes and terminal state. It also consistent with the current state where Git is control of the local display (eg. prefixing messages with "remote: "). The highlighting can be configured using color.remote.<KEYWORD> configuration settings. Since the keys are matched case insensitively, we match the keywords case insensitively too. Finally, this solution is backwards compatible: many servers already prefix their messages with "error", and they will benefit from this change without requiring a server update. By contrast, a server-side solution would likely require plumbing the TERM variable through the git protocol, so it would require changes to both server and client. Helped-by: Duy Nguyen <pclouds@gmail.com> Signed-off-by: Han-Wen Nienhuys <hanwen@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-08-07 14:51:08 +02:00
test_expect_success 'no coloring for redirected output' '
git --git-dir child/.git push -f origin HEAD:refs/heads/redirected-output 2>output &&
test_decode_color <output >decoded &&
grep "error: error" decoded
'
test_expect_success 'push with customized color' '
git --git-dir child/.git -c color.remote=always -c color.remote.error=blue push -f origin HEAD:refs/heads/customized-color 2>output &&
test_decode_color <output >decoded &&
grep "<BLUE>error<RESET>:" decoded &&
grep "<BOLD;GREEN>success<RESET>:" decoded
'
test_expect_success 'error in customized color' '
git --git-dir child/.git -c color.remote=always -c color.remote.error=i-am-not-a-color push -f origin HEAD:refs/heads/error-customized-color 2>output &&
test_decode_color <output >decoded &&
grep "<BOLD;GREEN>success<RESET>:" decoded
'
test_expect_success 'fallback to color.ui' '
git --git-dir child/.git -c color.ui=always push -f origin HEAD:refs/heads/fallback-color-ui 2>output &&
test_decode_color <output >decoded &&
grep "<BOLD;RED>error<RESET>: error" decoded
'
test_done
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