[PATCH v4 03/16] ref-filter: implement %(if:equals=<string>) and %(if:notequals=<string>)
- From
Karthik Nayak <karthik.188@gmail.com>
- Date
- Apr 9, 2016, 18:45 UTC
- Message-ID
- <1460227515-28437-4-git-send-email-Karthik.188@gmail.com>
- In-Reply-To
- <1460227515-28437-1-git-send-email-Karthik.188@gmail.com>
Implement %(if:equals=<string>) wherein the if condition is only satisfied if the value obtained between the %(if:...) and %(then) atom is the same as the given '<string>'.
Similarly, implement (if:notequals=<string>) wherein the if condition is only satisfied if the value obtained between the %(if:...) and %(then) atom is differnt from the given '<string>'.
This is done by introducing 'if_atom_parser()' which parses the given %(if) atom and then stores the data in used_atom which is later passed on to the used_atom of the %(then) atom, so that it can do the required comparisons.
Add tests and Documentation for the same.
Mentored-by: Christian Couder <christian.couder@gmail.com> Mentored-by: Matthieu Moy <matthieu.moy@grenoble-inp.fr> Signed-off-by: Karthik Nayak <karthik.188@gmail.com> --- Documentation/git-for-each-ref.txt | 3 +++ ref-filter.c | 43 +++++++++++++++++++++++++++++++++----- t/t6302-for-each-ref-filter.sh | 18 ++++++++++++++++ 3 files changed, 59 insertions(+), 5 deletions(-)
diff --git a/Documentation/git-for-each-ref.txt b/Documentation/git-for-each-ref.txt index d048561..e1b1a66 100644 --- a/Documentation/git-for-each-ref.txt +++ b/Documentation/git-for-each-ref.txt @@ -152,6 +152,9 @@ if:: evaluating the string before %(then), this is useful when we use the %(HEAD) atom which prints either "*" or " " and we want to apply the 'if' condition only on the 'HEAD' ref. + Append ":equals=<string>" or ":notequals=<string>" to compare + the value between the %(if:...) and %(then) atoms with the + given string. In addition to the above, for commit and tag objects, the header field names (`tree`, `parent`, `object`, `type`, and `tag`) can diff --git a/ref-filter.c b/ref-filter.c index 12e646c..857a8b5 100644 --- a/ref-filter.c +++ b/ref-filter.c @@ -22,6 +22,8 @@ struct align { }; struct if_then_else { + const char *if_equals, + *not_equals; unsigned int then_atom_seen : 1, else_atom_seen : 1, condition_satisfied : 1; @@ -49,6 +51,10 @@ static struct used_atom { enum { C_BARE, C_BODY, C_BODY_DEP, C_LINES, C_SIG, C_SUB } option; unsigned int nlines; } contents; + struct { + const char *if_equals, + *not_equals; + } if_then_else; enum { O_FULL, O_SHORT } objectname; } u; } *used_atom; @@ -169,6 +175,19 @@ static void align_atom_parser(struct used_atom *atom, const char *arg) string_list_clear(¶ms, 0); } +static void if_atom_parser(struct used_atom *atom, const char *arg) +{ + if (!arg) + return; + else if (skip_prefix(arg, "equals=", &atom->u.if_then_else.if_equals)) + ; + else if (skip_prefix(arg, "notequals=", &atom->u.if_then_else.not_equals)) + ; + else + die(_("unrecognized %%(if) argument: %s"), arg); +} + + static struct { const char *name; cmp_type cmp_type; @@ -209,7 +228,7 @@ static struct { { "color", FIELD_STR, color_atom_parser }, { "align", FIELD_STR, align_atom_parser }, { "end" }, - { "if" }, + { "if", FIELD_STR, if_atom_parser }, { "then" }, { "else" }, }; @@ -410,6 +429,9 @@ static void if_atom_handler(struct atom_value *atomv, struct ref_formatting_stat struct ref_formatting_stack *new; struct if_then_else *if_then_else = xcalloc(sizeof(struct if_then_else), 1); + if_then_else->if_equals = atomv->atom->u.if_then_else.if_equals; + if_then_else->not_equals = atomv->atom->u.if_then_else.not_equals; + push_stack_element(&state->stack); new = state->stack; new->at_end = if_then_else_handler; @@ -441,10 +463,17 @@ static void then_atom_handler(struct atom_value *atomv, struct ref_formatting_st die(_("format: %%(then) atom used after %%(else)")); if_then_else->then_atom_seen = 1; /* - * If there exists non-empty string between the 'if' and - * 'then' atom then the 'if' condition is satisfied. + * If the 'equals' or 'notequals' attribute is used then + * perform the required comparison. If not, only non-empty + * strings satisfy the 'if' condition. */ - if (cur->output.len && !is_empty(cur->output.buf)) + if (if_then_else->if_equals) { + if (!strcmp(if_then_else->if_equals, cur->output.buf)) + if_then_else->condition_satisfied = 1; + } else if (if_then_else->not_equals) { + if (strcmp(if_then_else->not_equals, cur->output.buf)) + if_then_else->condition_satisfied = 1; + } else if (cur->output.len && !is_empty(cur->output.buf)) if_then_else->condition_satisfied = 1; strbuf_reset(&cur->output); } @@ -1137,7 +1166,11 @@ static void populate_value(struct ref_array_item *ref) } else if (!strcmp(name, "end")) { v->handler = end_atom_handler; continue; - } else if (!strcmp(name, "if")) { + } else if (starts_with(name, "if")) { + const char *s; + + if (skip_prefix(name, "if:", &s)) + v->s = xstrdup(s); v->handler = if_atom_handler; continue; } else if (!strcmp(name, "then")) { diff --git a/t/t6302-for-each-ref-filter.sh b/t/t6302-for-each-ref-filter.sh index 05935b3..206ad67 100755 --- a/t/t6302-for-each-ref-filter.sh +++ b/t/t6302-for-each-ref-filter.sh @@ -404,4 +404,22 @@ test_expect_success 'ignore spaces in %(if) atom usage' ' test_cmp expect actual ' +test_expect_success 'check %(if:equals=<string>)' ' + git for-each-ref --format="%(if:equals=master)%(refname:short)%(then)Found master%(else)Not master%(end)" refs/heads/ >actual && + cat >expect <<-\EOF && + Found master + Not master + EOF + test_cmp expect actual +' + +test_expect_success 'check %(if:notequals=<string>)' ' + git for-each-ref --format="%(if:notequals=master)%(refname:short)%(then)Not master%(else)Found master%(end)" refs/heads/ >actual && + cat >expect <<-\EOF && + Found master + Not master + EOF + test_cmp expect actual +' + test_done
-- 2.8.0