[PATCH] introduce the --optional flag (FS#61336)
Will Song
incertia at incertia.net
Fri Jun 5 15:06:16 UTC 2020
I have pasted the patch below as per the normal pacman patch guidelines.
This is my first archlinux patch so go ham. I expect that there will
probably be a need for some formatting changes.
>From 4582d89f3c41ed94f1895aecbf123af0082ddc9c Mon Sep 17 00:00:00 2001
From: Will Song <incertia at incertia.net>
Date: Wed, 3 Jun 2020 19:48:22 -0400
Subject: [PATCH] introduce the --optional flag
--optional[=DEPTH] will control the depth at which optional dependencies
are printed. Its behavior is fairly simple. If the maximum depth is not
yet exceeded, and it encounters an optional dependency, it will print it
like a normal dependency except with an optional tag. A negative number
means infinite depth.
Signed-off-by: Will Song <incertia at incertia.net>
---
src/pactree.c | 160 +++++++++++++++++++++++++++++++++++---------------
1 file changed, 114 insertions(+), 46 deletions(-)
diff --git a/src/pactree.c b/src/pactree.c
index cf83326..39328e7 100644
--- a/src/pactree.c
+++ b/src/pactree.c
@@ -28,6 +28,8 @@
#define LINE_MAX 512
+#include <limits.h>
+
typedef struct tdepth {
struct tdepth *prev;
struct tdepth *next;
@@ -37,6 +39,7 @@ typedef struct tdepth {
/* output */
struct graph_style {
const char *provides;
+ const char *optional;
const char *tip;
const char *last;
const char *limb;
@@ -50,6 +53,7 @@ struct graph_style {
static struct graph_style graph_utf8 = {
" provides",
+ " (optional)",
UTF_VR UTF_H,
UTF_UR UTF_H,
UTF_V " ",
@@ -58,6 +62,7 @@ static struct graph_style graph_utf8 = {
static struct graph_style graph_default = {
" provides",
+ " (optional)",
"|-",
"`-",
"|",
@@ -69,6 +74,7 @@ static struct graph_style graph_linear = {
"",
"",
"",
+ "",
0
};
@@ -124,6 +130,7 @@ static int reverse = 0;
static int unique = 0;
static int searchsyncs = 0;
static int debug = 0;
+static int opt_level = 0;
static const char *dbpath = DBPATH;
static const char *configfile = CONFFILE;
static const char *gpgdir = GPGDIR;
@@ -243,20 +250,22 @@ static void usage(void)
fprintf(stdout, "pactree v" PACKAGE_VERSION "\n\n"
"A simple dependency tree viewer.\n\n"
"Usage: pactree [options] PACKAGE\n\n"
- " -a, --ascii use ASCII characters for tree formatting\n"
- " -b, --dbpath <path> set an alternate database location\n"
- " -c, --color colorize output\n"
- " -d, --depth <#> limit the depth of recursion\n"
- " -g, --graph generate output for graphviz's dot\n"
- " -h, --help display this help message\n"
- " -l, --linear enable linear output\n"
- " -r, --reverse list packages that depend on the named package\n"
- " -s, --sync search sync databases instead of local\n"
- " -u, --unique show dependencies with no duplicates (implies -l)\n"
- " -v, --version display the version\n"
- " --config <path> set an alternate configuration file\n"
- " --debug display debug messages\n"
- " --gpgdir <path> set an alternate home directory for GnuPG\n");
+ " -a, --ascii use ASCII characters for tree formatting\n"
+ " -b, --dbpath <path> set an alternate database location\n"
+ " -c, --color colorize output\n"
+ " -d, --depth <#> limit the depth of recursion\n"
+ " -g, --graph generate output for graphviz's dot\n"
+ " -h, --help display this help message\n"
+ " -l, --linear enable linear output\n"
+ " -r, --reverse list packages that depend on the named package\n"
+ " -s, --sync search sync databases instead of local\n"
+ " -u, --unique show dependencies with no duplicates (implies -l)\n"
+ " -o, --optional[=DEPTH] controls at which depth to stop printing optional deps\n"
+ " (-1 for no limit)\n"
+ " -v, --version display the version\n"
+ " --config <path> set an alternate configuration file\n"
+ " --debug display debug messages\n"
+ " --gpgdir <path> set an alternate home directory for GnuPG\n");
}
static void version(void)
@@ -280,6 +289,7 @@ static int parse_options(int argc, char *argv[])
{"reverse", no_argument, 0, 'r'},
{"sync", no_argument, 0, 's'},
{"unique", no_argument, 0, 'u'},
+ {"optional",optional_argument, 0, 'o'},
{"version", no_argument, 0, 'v'},
{"config", required_argument, 0, OP_CONFIG},
@@ -294,7 +304,7 @@ static int parse_options(int argc, char *argv[])
style = &graph_utf8;
}
- while((opt = getopt_long(argc, argv, "ab:cd:ghlrsuv", opts, &option_index))) {
+ while((opt = getopt_long(argc, argv, "ab:cd:ghlrsuo::v", opts, &option_index))) {
if(opt < 0) {
break;
}
@@ -345,6 +355,17 @@ static int parse_options(int argc, char *argv[])
case 'v':
version();
cleanup(0);
+ case 'o':
+ if(optarg) {
+ opt_level = (int)strtol(optarg, &endptr, 10);
+ if(*endptr != '\0') {
+ fprintf(stderr, "error: invalid optional depth -- %s\n", optarg);
+ return 1;
+ }
+ } else {
+ opt_level = 1;
+ }
+ break;
case 'h':
usage();
cleanup(0);
@@ -364,9 +385,10 @@ static int parse_options(int argc, char *argv[])
/* pkg provides provision */
static void print_text(const char *pkg, const char *provision,
- tdepth *depth, int last)
+ tdepth *depth, int last, int opt_dep)
{
const char *tip = "";
+ const char *opt_str = opt_dep ? style->optional : "";
int level = 1;
if(!pkg && !provision) {
/* not much we can do */
@@ -395,38 +417,39 @@ static void print_text(const char *pkg, const char *provision,
* want to print the provided package. This makes output easier to parse and
* to reuse. */
if(!pkg && provision) {
- printf("%s%s%s%s [unresolvable]%s\n", tip, color->leaf1,
- provision, color->branch1, color->off);
+ printf("%s%s%s%s [unresolvable]%s%s\n", tip, color->leaf1,
+ provision, color->branch1, opt_str, color->off);
} else if(provision && strcmp(pkg, provision) != 0 && *(style->provides) != '\0') {
- printf("%s%s%s%s%s %s%s%s\n", tip, color->leaf1, pkg,
- color->leaf2, style->provides, color->leaf1, provision,
+ printf("%s%s%s%s%s %s%s%s%s\n", tip, color->leaf1, pkg,
+ color->leaf2, style->provides, color->leaf1, provision, opt_str,
color->off);
} else {
- printf("%s%s%s%s\n", tip, color->leaf1, pkg, color->off);
+ printf("%s%s%s%s%s\n", tip, color->leaf1, pkg, opt_str, color->off);
}
}
-static void print_graph(const char *parentname, const char *pkgname, const char *depname)
+static void print_graph(const char *parentname, const char *pkgname, const char *depname, int opt_dep)
{
+ const char *style = opt_dep ? ", style=dotted" : "";
if(depname) {
- printf("\"%s\" -> \"%s\" [color=chocolate4];\n", parentname, depname);
+ printf("\"%s\" -> \"%s\" [color=chocolate4%s];\n", parentname, depname, style);
if(pkgname && strcmp(depname, pkgname) != 0 && !alpm_list_find_str(provisions, depname)) {
- printf("\"%s\" -> \"%s\" [arrowhead=none, color=grey];\n", depname, pkgname);
+ printf("\"%s\" -> \"%s\" [arrowhead=none, color=grey%s];\n", depname, pkgname, style);
provisions = alpm_list_add(provisions, strdup(depname));
}
} else if(pkgname) {
- printf("\"%s\" -> \"%s\" [color=chocolate4];\n", parentname, pkgname);
+ printf("\"%s\" -> \"%s\" [color=chocolate4%s];\n", parentname, pkgname, style);
}
}
/* parent depends on dep which is satisfied by pkg */
static void print(const char *parentname, const char *pkgname,
- const char *depname, tdepth *depth, int last)
+ const char *depname, tdepth *depth, int last, int opt_dep)
{
if(graphviz) {
- print_graph(parentname, pkgname, depname);
+ print_graph(parentname, pkgname, depname, opt_dep);
} else {
- print_text(pkgname, depname, depth, last);
+ print_text(pkgname, depname, depth, last, opt_dep);
}
}
@@ -442,7 +465,7 @@ static void print_start(const char *pkgname, const char *provname)
NULL,
0
};
- print_text(pkgname, provname, &d, 0);
+ print_text(pkgname, provname, &d, 0, 0);
}
}
@@ -465,23 +488,34 @@ static alpm_list_t *get_pkg_deps(alpm_pkg_t *pkg)
return dep_strings;
}
-/**
- * walk dependencies, showing dependencies of the target
- */
-static void walk_deps(alpm_list_t *dblist, alpm_pkg_t *pkg, tdepth *depth, int rev)
+static alpm_list_t *get_pkg_optdeps(alpm_pkg_t *pkg)
{
- alpm_list_t *deps, *i;
-
- if(!pkg || ((max_depth >= 0) && (depth->level > max_depth))) {
- return;
+ alpm_list_t *i, *dep_strings = NULL;
+ for(i = alpm_pkg_get_optdepends(pkg); i; i = alpm_list_next(i)) {
+ alpm_depend_t *dep = i->data;
+ char *ds = alpm_dep_compute_string(dep);
+ dep_strings = alpm_list_add(dep_strings, ds);
}
+ return dep_strings;
+}
- walked = alpm_list_add(walked, (void *)alpm_pkg_get_name(pkg));
+/* forward declaration */
+static void walk_deps(alpm_list_t *dblist, alpm_pkg_t *pkg, tdepth *depth, int rev, int optional);
- if(rev) {
- deps = alpm_pkg_compute_requiredby(pkg);
+/**
+ * print the dependency list given, passing the optional parameter when required
+ */
+static void print_dep_list(alpm_list_t *deps, alpm_list_t *dblist, alpm_pkg_t *pkg, tdepth *depth, int rev, int optional, int opt_dep)
+{
+ alpm_list_t *i;
+ int new_optional;
+
+ if(optional > 0) {
+ /* decrease the depth by 1 */
+ new_optional = optional - 1;
} else {
- deps = get_pkg_deps(pkg);
+ /* preserve 0 (ran out of depth) and negative numbers (infinite depth) */
+ new_optional = optional;
}
for(i = deps; i; i = alpm_list_next(i)) {
@@ -494,10 +528,10 @@ static void walk_deps(alpm_list_t *dblist, alpm_pkg_t *pkg, tdepth *depth, int r
/* if we've already seen this package, don't print in "unique" output
* and don't recurse */
if(!unique) {
- print(alpm_pkg_get_name(pkg), alpm_pkg_get_name(dep_pkg), pkgname, depth, last);
+ print(alpm_pkg_get_name(pkg), alpm_pkg_get_name(dep_pkg), pkgname, depth, last, opt_dep);
}
} else {
- print(alpm_pkg_get_name(pkg), alpm_pkg_get_name(dep_pkg), pkgname, depth, last);
+ print(alpm_pkg_get_name(pkg), alpm_pkg_get_name(dep_pkg), pkgname, depth, last, opt_dep);
if(dep_pkg) {
tdepth d = {
depth,
@@ -506,7 +540,7 @@ static void walk_deps(alpm_list_t *dblist, alpm_pkg_t *pkg, tdepth *depth, int r
};
depth->next = &d;
/* last dep, cut off the limb here */
- if(last) {
+ if((last && optional && opt_dep) || (last && !optional)) {
if(depth->prev) {
depth->prev->next = &d;
d.prev = depth->prev;
@@ -515,13 +549,47 @@ static void walk_deps(alpm_list_t *dblist, alpm_pkg_t *pkg, tdepth *depth, int r
d.prev = NULL;
}
}
- walk_deps(dblist, dep_pkg, &d, rev);
+ walk_deps(dblist, dep_pkg, &d, rev, new_optional);
depth->next = NULL;
}
}
}
+}
+
+/**
+ * walk dependencies, showing dependencies of the target
+ */
+static void walk_deps(alpm_list_t *dblist, alpm_pkg_t *pkg, tdepth *depth, int rev, int optional)
+{
+ alpm_list_t *deps;
+
+ if(!pkg || ((max_depth >= 0) && (depth->level > max_depth))) {
+ return;
+ }
+
+ walked = alpm_list_add(walked, (void *)alpm_pkg_get_name(pkg));
+
+ if(rev) {
+ deps = alpm_pkg_compute_requiredby(pkg);
+ } else {
+ deps = get_pkg_deps(pkg);
+ }
+
+ print_dep_list(deps, dblist, pkg, depth, rev, optional, 0);
FREELIST(deps);
+
+ if(optional){
+ if(rev) {
+ deps = alpm_pkg_compute_optionalfor(pkg);
+ } else {
+ deps = get_pkg_optdeps(pkg);
+ }
+
+ print_dep_list(deps, dblist, pkg, depth, rev, optional, 1);
+
+ FREELIST(deps);
+ }
}
int main(int argc, char *argv[])
@@ -576,7 +644,7 @@ int main(int argc, char *argv[])
NULL,
1
};
- walk_deps(dblist, pkg, &d, reverse);
+ walk_deps(dblist, pkg, &d, reverse, opt_level);
print_end();
--
2.25.0
--
Will Song
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