From: Karthik Nayak <karthik.188@gmail.com>
To: git@vger.kernel.org
Cc: jacob.keller@gmail.com, gitster@pobox.com,
Karthik Nayak <karthik.188@gmail.com>
Subject: [PATCH v10 03/20] ref-filter: implement %(if:equals=<string>) and %(if:notequals=<string>)
Date: Tue, 10 Jan 2017 14:19:36 +0530 [thread overview]
Message-ID: <20170110084953.15890-4-Karthik.188@gmail.com> (raw)
In-Reply-To: <20170110084953.15890-1-Karthik.188@gmail.com>
From: Karthik Nayak <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 different 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 | 46 +++++++++++++++++++++++++++++++++-----
t/t6302-for-each-ref-filter.sh | 18 +++++++++++++++
3 files changed, 62 insertions(+), 5 deletions(-)
diff --git a/Documentation/git-for-each-ref.txt b/Documentation/git-for-each-ref.txt
index 6b671ae92..d5be41973 100644
--- a/Documentation/git-for-each-ref.txt
+++ b/Documentation/git-for-each-ref.txt
@@ -158,6 +158,9 @@ 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 f31c4b68b..e002629ff 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -16,6 +16,7 @@
#include "trailer.h"
typedef enum { FIELD_STR, FIELD_ULONG, FIELD_TIME } cmp_type;
+typedef enum { COMPARE_EQUAL, COMPARE_UNEQUAL, COMPARE_NONE } cmp_status;
struct align {
align_type position;
@@ -23,6 +24,8 @@ struct align {
};
struct if_then_else {
+ cmp_status cmp_status;
+ const char *str;
unsigned int then_atom_seen : 1,
else_atom_seen : 1,
condition_satisfied : 1;
@@ -50,6 +53,10 @@ static struct used_atom {
enum { C_BARE, C_BODY, C_BODY_DEP, C_LINES, C_SIG, C_SUB, C_TRAILERS } option;
unsigned int nlines;
} contents;
+ struct {
+ cmp_status cmp_status;
+ const char *str;
+ } if_then_else;
enum { O_FULL, O_SHORT } objectname;
} u;
} *used_atom;
@@ -179,6 +186,21 @@ 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) {
+ atom->u.if_then_else.cmp_status = COMPARE_NONE;
+ return;
+ } else if (skip_prefix(arg, "equals=", &atom->u.if_then_else.str)) {
+ atom->u.if_then_else.cmp_status = COMPARE_EQUAL;
+ } else if (skip_prefix(arg, "notequals=", &atom->u.if_then_else.str)) {
+ atom->u.if_then_else.cmp_status = COMPARE_UNEQUAL;
+ } else {
+ die(_("unrecognized %%(if) argument: %s"), arg);
+ }
+}
+
+
static struct {
const char *name;
cmp_type cmp_type;
@@ -220,7 +242,7 @@ static struct {
{ "color", FIELD_STR, color_atom_parser },
{ "align", FIELD_STR, align_atom_parser },
{ "end" },
- { "if" },
+ { "if", FIELD_STR, if_atom_parser },
{ "then" },
{ "else" },
};
@@ -422,6 +444,9 @@ 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->str = atomv->atom->u.if_then_else.str;
+ if_then_else->cmp_status = atomv->atom->u.if_then_else.cmp_status;
+
push_stack_element(&state->stack);
new = state->stack;
new->at_end = if_then_else_handler;
@@ -453,10 +478,17 @@ 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->cmp_status == COMPARE_EQUAL) {
+ if (!strcmp(if_then_else->str, cur->output.buf))
+ if_then_else->condition_satisfied = 1;
+ } else if (if_then_else->cmp_status == COMPARE_UNEQUAL) {
+ if (strcmp(if_then_else->str, 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);
}
@@ -1158,7 +1190,11 @@ 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 fed30133d..a09a1a46e 100755
--- a/t/t6302-for-each-ref-filter.sh
+++ b/t/t6302-for-each-ref-filter.sh
@@ -403,4 +403,22 @@ 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
--
2.11.0
next prev parent reply other threads:[~2017-01-10 8:49 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-10 8:49 [PATCH v10 00/20] port branch.c to use ref-filter's printing options Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 01/20] ref-filter: implement %(if), %(then), and %(else) atoms Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 02/20] ref-filter: include reference to 'used_atom' within 'atom_value' Karthik Nayak
2017-01-10 8:49 ` Karthik Nayak [this message]
2017-01-10 20:45 ` [PATCH v10 03/20] ref-filter: implement %(if:equals=<string>) and %(if:notequals=<string>) Junio C Hamano
2017-01-14 10:02 ` Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 04/20] ref-filter: modify "%(objectname:short)" to take length Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 05/20] ref-filter: move get_head_description() from branch.c Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 06/20] ref-filter: introduce format_ref_array_item() Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 07/20] ref-filter: make %(upstream:track) prints "[gone]" for invalid upstreams Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 08/20] ref-filter: add support for %(upstream:track,nobracket) Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 09/20] ref-filter: make "%(symref)" atom work with the ':short' modifier Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 10/20] ref-filter: introduce refname_atom_parser_internal() Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 11/20] ref-filter: introduce refname_atom_parser() Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 12/20] ref-filter: make remote_ref_atom_parser() use refname_atom_parser_internal() Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 13/20] ref-filter: rename the 'strip' option to 'lstrip' Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 14/20] ref-filter: Do not abruptly die when using the 'lstrip=<N>' option Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 15/20] ref-filter: modify the 'lstrip=<N>' option to work with negative '<N>' Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 16/20] ref-filter: add an 'rstrip=<N>' option to atoms which deal with refnames Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 17/20] ref-filter: allow porcelain to translate messages in the output Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 18/20] branch, tag: use porcelain output Karthik Nayak
2017-01-10 8:49 ` [PATCH v10 19/20] branch: use ref-filter printing APIs Karthik Nayak
2017-01-11 23:47 ` Jacob Keller
2017-01-14 10:01 ` Karthik Nayak
2017-01-15 5:51 ` Jacob Keller
2017-01-10 8:49 ` [PATCH v10 20/20] branch: implement '--format' option Karthik Nayak
2017-01-10 20:51 ` [PATCH v10 00/20] port branch.c to use ref-filter's printing options Junio C Hamano
2017-01-14 10:03 ` Karthik Nayak
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