git/completion at 3bee6a4733a1ff03b9cc659ea026c6dc17567d4d - git

Tree: 3bee6a4733

SZEDER Gábor 3bee6a4733 completion: don't declare 'local words' to make zsh happy The "_get_comp_words_by_ref -n := words" command from the bash_completion library reassembles a modified version of COMP_WORDS with ':' and '=' no longer treated as word separators and stores it in the ${words[@]} array. Git's programmable tab completion script uses this to abstract away the difference between bash v3's and bash v4's definitions of COMP_WORDS (bash v3 used shell words, while bash v4 breaks at separator characters); see v1.7.4-rc0~11^2~2 (bash: get --pretty=m<tab> completion to work with bash v4, 2010-12-02). zsh has (or rather its completion functions have) another idea about what ${words[@]} should contain: the array is prepopulated with the words from the command it is completing. For reasons that are not well understood, when git-completion.bash reserves its own "words" variable with "local words", the variable becomes empty and cannot be changed from then on. So the completion script neglects the arguments it has seen, and words complete like git subcommand names. For example, typing "git log origi<TAB>" gives no completions because there are no "git origi..." commands. However, when this words variable is not declared as local but is just populated by _get_comp_words_by_ref() and then read in various completion functions, then zsh seems to be happy about it and our completion script works as expected. So, to get our completion script working again under zsh and to prevent the words variable from leaking into the shell environment under bash, we will only declare words as local when using bash. Reported-by: Stefan Haller <lists@haller-berlin.de> Suggested-by: Felipe Contreras <felipe.contreras@gmail.com> Explained-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: SZEDER Gábor <szeder@ira.uka.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>	14 years ago
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git-completion.bash	completion: don't declare 'local words' to make zsh happy	14 years ago

SZEDER Gábor 3bee6a4733 completion: don't declare 'local words' to make zsh happy

The "_get_comp_words_by_ref -n := words" command from the
bash_completion library reassembles a modified version of COMP_WORDS
with ':' and '=' no longer treated as word separators and stores it in
the ${words[@]} array.  Git's programmable tab completion script uses
this to abstract away the difference between bash v3's and bash v4's
definitions of COMP_WORDS (bash v3 used shell words, while bash v4
breaks at separator characters); see v1.7.4-rc0~11^2~2 (bash: get
--pretty=m<tab> completion to work with bash v4, 2010-12-02).

zsh has (or rather its completion functions have) another idea about
what ${words[@]} should contain: the array is prepopulated with the
words from the command it is completing.  For reasons that are not
well understood, when git-completion.bash reserves its own "words"
variable with "local words", the variable becomes empty and cannot be
changed from then on.  So the completion script neglects the arguments
it has seen, and words complete like git subcommand names.  For
example, typing "git log origi<TAB>" gives no completions because
there are no "git origi..." commands.

However, when this words variable is not declared as local but is just
populated by _get_comp_words_by_ref() and then read in various
completion functions, then zsh seems to be happy about it and our
completion script works as expected.

So, to get our completion script working again under zsh and to
prevent the words variable from leaking into the shell environment
under bash, we will only declare words as local when using bash.

Reported-by: Stefan Haller <lists@haller-berlin.de>
Suggested-by: Felipe Contreras <felipe.contreras@gmail.com>
Explained-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

14 years ago

git-completion.bash

completion: don't declare 'local words' to make zsh happy

14 years ago