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.cou...@gmail.com>
Mentored-by: Matthieu Moy <matthieu....@grenoble-inp.fr>
Signed-off-by: Karthik Nayak <karthik....@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 954b12a..83716e4 100755
--- a/t/t6302-for-each-ref-filter.sh
+++ b/t/t6302-for-each-ref-filter.sh
@@ -367,4 +367,22 @@ 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
--
2.7.3
--
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